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Rice husk derived Aminated Silica for the efficient adsorption of different gases
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Physical and chemical properties of the synthesized material were investigated by various" /> <meta property="article:author" content="https://independent.academia.edu/RashedBakdash" /> <meta name="description" content="In this present work, we successfully prepared aminated silica (ASiO 2) from rice husk ash (RHA) and functionalized with 3-aminopropyltriethoxysilane (APTES). 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false; window.loswp.work = {"work":{"id":107915331,"created_at":"2023-10-10T02:41:24.263-07:00","from_world_paper_id":241697931,"updated_at":"2025-02-01T15:56:19.600-08:00","_data":{"publisher":"Nature Portfolio","ai_title_tag":"Aminated Silica from Rice Husk for Gas Adsorption","grobid_abstract":"In this present work, we successfully prepared aminated silica (ASiO 2) from rice husk ash (RHA) and functionalized with 3-aminopropyltriethoxysilane (APTES). Physical and chemical properties of the synthesized material were investigated by various techniques SEM-EDX, XPS, FTIR, TGA. The surface area of RHA was 223 m 2 /g, while for ASiO 2 was 101 m 2 /g. Molecular level DFT calculations revealed that the functionalization of ASiO 2 resulted in a significant decrease in the HOMO-LUMO energy gap, a reduction in hardness, and a consequent increase in charge transfer characteristics. The adsorption behavior at low pressure (1 atm.) of aminated silica on different gases CO 2 , CH 4 , H 2 , and N 2 at temperatures 77, 273, 298 K was studied. The adsorption of hydrogen was reported for the first time on aminated silica with an excellent adsorption capacity of 1.2 mmol/g. The ASiO 2 exhibited excellent performance in terms of gas separation in binary mixtures of CO 2 /CH 4 , CO 2 /N 2 and CO 2 /H 2 at 273, and 298 K, respectively. The catalyst further exhibits high stability during three cycles with less than 10% variation in the separation capacity. The flexibility of silica-based mesoporous materials enables their functionalization with other materials, such as metal nanoparticles, or rare-earth elements 1. Mesoporous silica has an advantage of high surface area and pore volume, high stability, unique pore structure characteristics, and uniform pore size distributions. It has been widely used in wastewater treatment, air purification, thermal insulation systems, oxygen, and humidity sensors and battery electrodes applications 2. Other applications include as gas adsorbent due to its controllable pore size and volume. The functional groups present on the surface of mesoporous silica contributes significantly to its gas adsorption-desorption capacity and its interactions with other materials 1,3. The rising average temperature of the earth as a result of an increased presence of greenhouse gases such as CO2 have raised a lot of concerns in recent years. CO 2 is considered one of the major contributors (up to 60%) to total greenhouse gas emissions. To reduce the impact of CO 2 gas, the CO 2 Capture, Storage and Utilization technologies were introduced. However, the sustainability of these technologies remain of concern due to the cost implications 4. The captured CO2 can be converted into valuable chemicals such as methane which is considered a green source of power generation in households 4,5. The purification and upgrade of biogas (CH 4 , CO 2 , and N 2) to meet pure natural gas (CH 4) (pipeline quality) to avoid the corrosion can be achieved by effective cheap techniques to separate CO 2 and N 2 gas, such as absorption 6 , cryogenic separation 7 , membrane separation 8 , distillation 9 and adsorption 10. More specifically, solid adsorbents are more effective and less expensive than liquid absorbents like amine solvents, which have some restrictions due to their volatility, tendency to cause corrosion and high-energy consumption, especially in long-term application 4,5,11-14. CO 2 capture as a physisorption process can be achieved by using activated carbon, silica gel, molecularly imprinted adsorbents, metal-organic frameworks (MOFs), and mesoporous molecular sieve 2. The development of mesoporous materials have attracted more attentions in recent years for CO 2 adsorption due to their high porosity, high gas diffusibility, and large pore volumes. Moreover, the separation capacity and selectivity of CO 2 on mesoporous materials are not good enough. So, the improvement of these materials is highly attractive 15. The functionalization of mesoporous adsorbent with various type of amines will enhance the interactions with CO 2 compared with microporous materials due to the formation of ammonium carbamates and carbonates reversibly at moderate temperature 16,17. Amine functionalization results in highly efficient CO 2 capture at low temperature due to the strong interaction between the CO 2 molecules and the porous structure, resulting in high gas diffusion through the adsorbent 18. Kumar et al. 19 , reported the functionalization of commercial silica with polyethyleneimine and 3-aminopropyltriethoxysilane (APTES) for CO 2 capture. The amine functional group drastically enhanced the adsorption","publication_date":"2020,11,11","publication_name":"Scientific Reports","grobid_abstract_attachment_id":"106444276"},"document_type":"paper","pre_hit_view_count_baseline":null,"quality":"high","language":"en","title":"Rice husk derived Aminated Silica for the efficient adsorption of different gases","broadcastable":false,"draft":null,"has_indexable_attachment":true,"indexable":true}}["work"]; window.loswp.workCoauthors = [106702346]; window.loswp.locale = "en"; window.loswp.countryCode = "SG"; window.loswp.cwvAbTestBucket = ""; window.loswp.designVariant = "ds_vanilla"; window.loswp.fullPageMobileSutdModalVariant = "control"; window.loswp.useOptimizedScribd4genScript = false; window.loginModal = {}; window.loginModal.appleClientId = 'edu.academia.applesignon'; window.userInChina = "false";</script><script defer="" src="https://accounts.google.com/gsi/client"></script><div class="ds-loswp-container"><div class="ds-work-card--grid-container"><div class="ds-work-card--container js-loswp-work-card"><div class="ds-work-card--cover"><div class="ds-work-cover--wrapper"><div class="ds-work-cover--container"><button class="ds-work-cover--clickable js-swp-download-button" data-signup-modal="{"location":"swp-splash-paper-cover","attachmentId":106444275,"attachmentType":"pdf"}"><img alt="First page of “Rice husk derived Aminated Silica for the efficient adsorption of different gases”" class="ds-work-cover--cover-thumbnail" src="https://0.academia-photos.com/attachment_thumbnails/106444275/mini_magick20231010-1-rcvmte.png?1696930928" /><img alt="PDF Icon" class="ds-work-cover--file-icon" src="//a.academia-assets.com/images/single_work_splash/adobe_icon.svg" /><div class="ds-work-cover--hover-container"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span><p>Download Free PDF</p></div><div class="ds-work-cover--ribbon-container">Download Free PDF</div><div class="ds-work-cover--ribbon-triangle"></div></button></div></div></div><div class="ds-work-card--work-information"><h1 class="ds-work-card--work-title">Rice husk derived Aminated Silica for the efficient adsorption of different gases</h1><div class="ds-work-card--work-authors ds-work-card--detail"><a class="ds-work-card--author js-wsj-grid-card-author ds2-5-body-md ds2-5-body-link" data-author-id="106702346" href="https://independent.academia.edu/RashedBakdash"><img alt="Profile image of Rashed Bakdash" class="ds-work-card--author-avatar" src="//a.academia-assets.com/images/s65_no_pic.png" />Rashed Bakdash</a></div><div class="ds-work-card--detail"><p class="ds-work-card--detail ds2-5-body-sm">2020, Scientific Reports</p><div class="ds-work-card--work-metadata"><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">visibility</span><p class="ds2-5-body-sm" id="work-metadata-view-count">…</p></div><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">description</span><p class="ds2-5-body-sm">12 pages</p></div><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">link</span><p class="ds2-5-body-sm">1 file</p></div></div><script>(async () => { const workId = 107915331; const worksViewsPath = "/v0/works/views?subdomain_param=api&work_ids%5B%5D=107915331"; const getWorkViews = async (workId) => { const response = await fetch(worksViewsPath); if (!response.ok) { throw new Error('Failed to load work views'); } const data = await response.json(); return data.views[workId]; }; // Get the view count for the work - we send this immediately rather than waiting for // the DOM to load, so it can be available as soon as possible (but without holding up // the backend or other resource requests, because it's a bit expensive and not critical). const viewCount = await getWorkViews(workId); const updateViewCount = (viewCount) => { try { const viewCountNumber = parseInt(viewCount, 10); if (viewCountNumber === 0) { // Remove the whole views element if there are zero views. document.getElementById('work-metadata-view-count')?.parentNode?.remove(); return; } const commaizedViewCount = viewCountNumber.toLocaleString(); const viewCountBody = document.getElementById('work-metadata-view-count'); if (!viewCountBody) { throw new Error('Failed to find work views element'); } viewCountBody.textContent = `${commaizedViewCount} views`; } catch (error) { // Remove the whole views element if there was some issue parsing. document.getElementById('work-metadata-view-count')?.parentNode?.remove(); throw new Error(`Failed to parse view count: ${viewCount}`, error); } }; // If the DOM is still loading, wait for it to be ready before updating the view count. if (document.readyState === "loading") { document.addEventListener('DOMContentLoaded', () => { updateViewCount(viewCount); }); // Otherwise, just update it immediately. } else { updateViewCount(viewCount); } })();</script></div><p class="ds-work-card--work-abstract ds-work-card--detail ds2-5-body-md">In this present work, we successfully prepared aminated silica (ASiO 2) from rice husk ash (RHA) and functionalized with 3-aminopropyltriethoxysilane (APTES). Physical and chemical properties of the synthesized material were investigated by various techniques SEM-EDX, XPS, FTIR, TGA. The surface area of RHA was 223 m 2 /g, while for ASiO 2 was 101 m 2 /g. Molecular level DFT calculations revealed that the functionalization of ASiO 2 resulted in a significant decrease in the HOMO-LUMO energy gap, a reduction in hardness, and a consequent increase in charge transfer characteristics. The adsorption behavior at low pressure (1 atm.) of aminated silica on different gases CO 2 , CH 4 , H 2 , and N 2 at temperatures 77, 273, 298 K was studied. The adsorption of hydrogen was reported for the first time on aminated silica with an excellent adsorption capacity of 1.2 mmol/g. The ASiO 2 exhibited excellent performance in terms of gas separation in binary mixtures of CO 2 /CH 4 , CO 2 /N 2 and CO 2 /H 2 at 273, and 298 K, respectively. The catalyst further exhibits high stability during three cycles with less than 10% variation in the separation capacity. The flexibility of silica-based mesoporous materials enables their functionalization with other materials, such as metal nanoparticles, or rare-earth elements 1. Mesoporous silica has an advantage of high surface area and pore volume, high stability, unique pore structure characteristics, and uniform pore size distributions. It has been widely used in wastewater treatment, air purification, thermal insulation systems, oxygen, and humidity sensors and battery electrodes applications 2. Other applications include as gas adsorbent due to its controllable pore size and volume. The functional groups present on the surface of mesoporous silica contributes significantly to its gas adsorption-desorption capacity and its interactions with other materials 1,3. The rising average temperature of the earth as a result of an increased presence of greenhouse gases such as CO2 have raised a lot of concerns in recent years. CO 2 is considered one of the major contributors (up to 60%) to total greenhouse gas emissions. To reduce the impact of CO 2 gas, the CO 2 Capture, Storage and Utilization technologies were introduced. However, the sustainability of these technologies remain of concern due to the cost implications 4. The captured CO2 can be converted into valuable chemicals such as methane which is considered a green source of power generation in households 4,5. The purification and upgrade of biogas (CH 4 , CO 2 , and N 2) to meet pure natural gas (CH 4) (pipeline quality) to avoid the corrosion can be achieved by effective cheap techniques to separate CO 2 and N 2 gas, such as absorption 6 , cryogenic separation 7 , membrane separation 8 , distillation 9 and adsorption 10. More specifically, solid adsorbents are more effective and less expensive than liquid absorbents like amine solvents, which have some restrictions due to their volatility, tendency to cause corrosion and high-energy consumption, especially in long-term application 4,5,11-14. CO 2 capture as a physisorption process can be achieved by using activated carbon, silica gel, molecularly imprinted adsorbents, metal-organic frameworks (MOFs), and mesoporous molecular sieve 2. The development of mesoporous materials have attracted more attentions in recent years for CO 2 adsorption due to their high porosity, high gas diffusibility, and large pore volumes. Moreover, the separation capacity and selectivity of CO 2 on mesoporous materials are not good enough. So, the improvement of these materials is highly attractive 15. The functionalization of mesoporous adsorbent with various type of amines will enhance the interactions with CO 2 compared with microporous materials due to the formation of ammonium carbamates and carbonates reversibly at moderate temperature 16,17. Amine functionalization results in highly efficient CO 2 capture at low temperature due to the strong interaction between the CO 2 molecules and the porous structure, resulting in high gas diffusion through the adsorbent 18. Kumar et al. 19 , reported the functionalization of commercial silica with polyethyleneimine and 3-aminopropyltriethoxysilane (APTES) for CO 2 capture. The amine functional group drastically enhanced the adsorption</p><div class="ds-work-card--button-container"><button class="ds2-5-button js-swp-download-button" data-signup-modal="{"location":"continue-reading-button--work-card","attachmentId":106444275,"attachmentType":"pdf","workUrl":"https://www.academia.edu/107915331/Rice_husk_derived_Aminated_Silica_for_the_efficient_adsorption_of_different_gases"}">See full PDF</button><button class="ds2-5-button ds2-5-button--secondary js-swp-download-button" data-signup-modal="{"location":"download-pdf-button--work-card","attachmentId":106444275,"attachmentType":"pdf","workUrl":"https://www.academia.edu/107915331/Rice_husk_derived_Aminated_Silica_for_the_efficient_adsorption_of_different_gases"}"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span>Download PDF</button></div><div class="ds-signup-banner-trigger-container"><div class="ds-signup-banner-trigger ds-signup-banner-trigger-control"></div></div><div class="ds-signup-banner ds-signup-banner-control"><div id="ds-signup-banner-close-button"><button class="ds2-5-button ds2-5-button--secondary ds2-5-button--inverse"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">close</span></button></div><div class="ds-signup-banner-ctas" data-impression-entity-id="107915331" data-impression-entity-type="2" data-impression-source="signup-banner"><img src="//a.academia-assets.com/images/academia-logo-capital-white.svg" /><h4 class="ds2-5-heading-serif-sm">Sign up for access to the world's latest research</h4><button class="ds2-5-button ds2-5-button--inverse ds2-5-button--full-width js-swp-download-button" data-signup-modal="{"location":"signup-banner"}">Sign up for free<span class="material-symbols-outlined" style="font-size: 20px" translate="no">arrow_forward</span></button></div><div class="ds-signup-banner-divider"></div><div class="ds-signup-banner-reasons"><div class="ds-signup-banner-reasons-item"><span class="material-symbols-outlined" style="font-size: 24px" translate="no">check</span><span>Get notified about relevant papers</span></div><div class="ds-signup-banner-reasons-item"><span class="material-symbols-outlined" style="font-size: 24px" translate="no">check</span><span>Save papers to use in your research</span></div><div class="ds-signup-banner-reasons-item"><span class="material-symbols-outlined" style="font-size: 24px" translate="no">check</span><span>Join the discussion with peers</span></div><div class="ds-signup-banner-reasons-item"><span class="material-symbols-outlined" style="font-size: 24px" translate="no">check</span><span>Track your impact</span></div></div></div><script>(() => { // Set up signup banner show/hide behavior: // 1. 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Therefore, the engineering of solid supports for efficient CO2 adsorption attracts research attention. Modification of mesoporous silica materials with tailor-made organic molecules can greatly improve silica’s performance in CO2 capture and separation. In that context, a new derivative of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, possessing an electron-rich condensed aromatic structure and also known for its anti-oxidative properties, was synthesized and applied as a modifying agent of 2D SBA-15, 3D SBA-16, and KIT-6 silicates. The physicochemical properties of the initial and modified materials were studied using nitrogen physisorption and temperature-gravimetric analysis. The adsorption capacity of CO2 was measured in a dynamic CO2 adsorption regime. The three modified materials displayed a higher capacity for CO2 adsorption than the initial ones. Among the studied sorbe...</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Engineering of Silica Mesoporous Materials for CO2 Adsorption","attachmentId":103467907,"attachmentType":"pdf","work_url":"https://www.academia.edu/103468074/Engineering_of_Silica_Mesoporous_Materials_for_CO2_Adsorption","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/103468074/Engineering_of_Silica_Mesoporous_Materials_for_CO2_Adsorption"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="1" data-entity-id="115224559" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/115224559/Preparation_and_characterisation_of_amino_functionalized_pore_expanded_mesoporous_silica_for_carbon_dioxide_capture">Preparation and characterisation of amino-functionalized pore-expanded mesoporous silica for carbon dioxide capture</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="35116561" href="https://independent.academia.edu/IvankaHolclajtnerantunovic">Ivanka Holclajtner-antunovic</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Journal of Porous Materials, 2020</p><p class="ds-related-work--abstract ds2-5-body-sm">In this study, the preparation of some large-pore ordered mesoporous silicas using a proper surfactant with different swelling agents was carried out. The synthesis of conventional SBA-15 was modified to obtain pore-expanded materials, with pore diameters up to 10 nm. To use a micelle swelling agent with a moderate swelling ability, three swelling agents were selected: 1-phenyl-decane (Dec), butyl benzene (BB), and mesitylene (Mes). These syntheses aimed to achieve a pore diameter enlargement but at the same time to avoid the formation of heterogeneous and/or poorly defined nanostructure of silica. The CO 2 adsorbents were obtained by post-synthesis functionalization treatments carried out by grafting with 3-aminopropyl triethoxysilane. The CO 2 adsorption/desorption experiments showed that carbon dioxide sorption capacities depend on the textural characteristics and the temperature used for the adsorption process. Good CO 2 adsorption capacities were obtained for all prepared adsorbents, especially for SSBA-15-Mes-sil and SSBA-15-BB-sil samples. At 50 °C, the SSBA-15-Mes-sil sample has an adsorption capacity of 3.58 mmol CO 2 /g SiO 2 , and an efficiency of amino groups of 0.99 mmol CO 2 /mmol NH 2. The results of adsorption capacities are comparable or even superior with the ones reported in literature for mesoporous silica functionalized with different amines. After nine adsorption-desorption cycles, the performance of the SSBA-15-Messil adsorbent is relatively stable, with a low decrease in the adsorption capacity (0.1 mmol/g of CO 2 , i.e., 2.8% of initial capacity). These studies show the potential of mesoporous silica for carbon dioxide capture.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Preparation and characterisation of amino-functionalized pore-expanded mesoporous silica for carbon dioxide capture","attachmentId":111694307,"attachmentType":"pdf","work_url":"https://www.academia.edu/115224559/Preparation_and_characterisation_of_amino_functionalized_pore_expanded_mesoporous_silica_for_carbon_dioxide_capture","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/115224559/Preparation_and_characterisation_of_amino_functionalized_pore_expanded_mesoporous_silica_for_carbon_dioxide_capture"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="2" data-entity-id="22055953" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/22055953/Amine_modified_ordered_mesoporous_silica_The_effect_of_pore_size_on_CO2_capture_performance">Amine-modified ordered mesoporous silica: The effect of pore size on CO2 capture performance</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="43337831" href="https://independent.academia.edu/MaohongFan">Maohong Fan</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Applied Surface Science, 2015</p><p class="ds-related-work--abstract ds2-5-body-sm">The objective of current research is to investigate the effect of pore size of mesoporous silica supports on the CO 2 capture performance of solid amine sorbents. Two ordered mesoporous silicas (OMS) with different pore sizes (5.6 nm and 7.6 nm) were synthesized as tetraethylenepentamine (TEPA) supports. A serious of techniques, such as physical adsorption, infrared spectroscopy and thermal gravimetric analysis were used to characterize the solid amine sorbents. The CO 2 capture performances of the sorbents were evaluated using breakthrough method with a fixed-bed reactor equipped with an online mass spectrometer. The experimental results indicate that the pore size has significant influence on CO 2 capture performance. Larger pore size could decrease the mass transfer resistance and increase the interaction between CO 2 and TEPA. Therefore, OMS-7.6 is better than OMS-5.6 as amine support. The highest CO 2 sorption capacities achieved with OMS-7.6 with 50 wt% TEPA loading (OMS-7.6-50) in the absence and presence of moisture are 3.45 mmol/g and 4.28 mmol/g, respectively, under the conditions of 10.0% CO 2 /N 2 mixture at 75 • C. Cyclic CO 2 adsorption-desorption experiments indicate that the solid amine sorbents are fairly stable and regenerable.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Amine-modified ordered mesoporous silica: The effect of pore size on CO2 capture performance","attachmentId":42734520,"attachmentType":"pdf","work_url":"https://www.academia.edu/22055953/Amine_modified_ordered_mesoporous_silica_The_effect_of_pore_size_on_CO2_capture_performance","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/22055953/Amine_modified_ordered_mesoporous_silica_The_effect_of_pore_size_on_CO2_capture_performance"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="3" data-entity-id="14992405" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/14992405/Amine_modified_ordered_mesoporous_silica_Effect_of_pore_size_on_carbon_dioxide_capture">Amine-modified ordered mesoporous silica: Effect of pore size on carbon dioxide capture</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="33988471" href="https://independent.academia.edu/D%C3%A1%C5%A1aHalamov%C3%A1">Dáša Halamová</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Chemical Engineering Journal, 2008</p><p class="ds-related-work--abstract ds2-5-body-sm">Three mesoporous silica materials with different pore sizes (33 Å for small pore size MCM-41; 38 Å for SBA-12; 71 Å for large pore size SBA-15) and pore connectivity (2D for MCM-41 and SBA-15-type materials; 3D for SBA-12 material) were prepared and functionalized with aminopropyl (AP) ligands by post-synthesis treatment. The materials were characterized by small angle X-ray scattering (SAXS), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and nitrogen adsorption/desorption experiments. The carbon dioxide sorption on modified mesoporous molecular sieves was investigated by using of microbalances at 25 • C, and the influence of pore size and pore architecture on CO 2 sorption was discussed. The large pore silica, SBA-15, showed the largest carbon dioxide sorption capacity (1.5 mmol/g), relating to highest amine surface density in this material. On the other hand, three-dimensional accessibility of amine sites inside the pores of SBA-12 silica resulted in a faster response to CO 2 uptake in comparison with MCM-41 and SBA-15 molecular sieves.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Amine-modified ordered mesoporous silica: Effect of pore size on carbon dioxide capture","attachmentId":43669582,"attachmentType":"pdf","work_url":"https://www.academia.edu/14992405/Amine_modified_ordered_mesoporous_silica_Effect_of_pore_size_on_carbon_dioxide_capture","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/14992405/Amine_modified_ordered_mesoporous_silica_Effect_of_pore_size_on_carbon_dioxide_capture"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="4" data-entity-id="80988757" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/80988757/Effect_of_the_amine_type_on_thermal_stability_of_modified_mesoporous_silica_used_for_CO2_adsorption">Effect of the amine type on thermal stability of modified mesoporous silica used for CO2 adsorption</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="218610580" href="https://independent.academia.edu/VerdesOrsina">Orsina Verdes</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Journal of Thermal Analysis and Calorimetry, 2018</p><p class="ds-related-work--abstract ds2-5-body-sm">In this study, the preparation by grafting of amino-functionalized SBA-15 molecular sieves was carried out. Aminofunctionalized molecular sieves were synthesized using a silane coupling agent and different types of amination reagents which react with modified SBA-15. These composites were characterized by FT-IR spectroscopy, X-ray diffraction at low angles, nitrogen physisorption at 77 K, and evaluated by the adsorption of CO 2 and its temperature-programmed desorption-TPD. Thermal stability was investigated by TGA and DTA methods. In the view of a possible use of these aminofunctionalized molecular sieves as sorbents for CO 2 removal, their adsorption-desorption properties towards CO 2 were also investigated by the TPD method. The mass loss of amino-functionalized molecular sieves above 215°C was due to the oxidation and decomposition of amino propyl functional groups. This means that these composites could be used for adsorption of CO 2 at temperatures below 215°C. The adsorption of CO 2 and its temperature programmed desorption using thermogravimetry were studied for amino-functionalized molecular sieves at 60°C. The evolved gases during the adsorption-desorption of CO 2 on amino-functionalized molecular sieves were identified by online mass spectrometry coupled with thermogravimetry. CO 2 adsorption isotherms of functionalized samples at 60°C showed that both the adsorption capacity (mg CO 2 /g adsorbent) and the efficiency of amino groups (mol CO 2 /mol NH 2) depend on the type of amination reagents and the amount of organic compound used.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Effect of the amine type on thermal stability of modified mesoporous silica used for CO2 adsorption","attachmentId":87187486,"attachmentType":"pdf","work_url":"https://www.academia.edu/80988757/Effect_of_the_amine_type_on_thermal_stability_of_modified_mesoporous_silica_used_for_CO2_adsorption","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/80988757/Effect_of_the_amine_type_on_thermal_stability_of_modified_mesoporous_silica_used_for_CO2_adsorption"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="5" data-entity-id="13777745" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/13777745/Functionalised_micro_mesoporous_silica_for_the_adsorption_of_carbon_dioxide">Functionalised micro-/mesoporous silica for the adsorption of carbon dioxide</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="32886836" href="https://univ-amu.academia.edu/PhilipLlewellyn">Philip Llewellyn</a><span>, </span><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="33023593" href="https://univ-amu.academia.edu/VirginieHornebecq">Virginie Hornebecq</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Microporous and Mesoporous Materials, 2007</p><p class="ds-related-work--abstract ds2-5-body-sm">SBA-16 silica was synthesised using the tri-block copolymer F127 as a surfactant. The copolymer was eliminated by calcination to 823 K or extraction with ethanol. These materials were functionalised with the diamine (CH 3 O) 3 Si-(CH 2 ) 3 -NH-(CH 2 ) 2 -NH 2 by post-synthesis grafting. TGA and DRIFT infrared spectroscopy revealed that the copolymer was not removed completely by extraction. For both methods the cubic pore structure of the synthesised silica remained intact which was corroborated by nitrogen isotherms and TEM measurements. The adsorption of carbon dioxide was studied with microcalorimetry at 300 K and up to 35 bars. The grafted silica samples show high enthalpies [À(90-100) kJ mol À1 ] at low pressures for the carbon dioxide adsorption. This was attributed to the initial interactions of the gas with the amine modified silica surface. With increasing carbon dioxide pressures the enthalpies decreased to values close to those observed with the non-grafted silica. The amounts of CO 2 adsorbed at 30 bar were $6.5 mmol g À1 for the non-grafted silica samples and 5.4 (extracted sample) and 4.6 mmol g À1 adsorbent (calcined sample) for the grafted silica materials, respectively.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Functionalised micro-/mesoporous silica for the adsorption of carbon dioxide","attachmentId":44965772,"attachmentType":"pdf","work_url":"https://www.academia.edu/13777745/Functionalised_micro_mesoporous_silica_for_the_adsorption_of_carbon_dioxide","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/13777745/Functionalised_micro_mesoporous_silica_for_the_adsorption_of_carbon_dioxide"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="6" data-entity-id="57181857" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/57181857/Amine_Grafted_Mesoporous_Silica_for_CO2_Capture">Amine-Grafted Mesoporous Silica for CO2 Capture</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="46539703" href="https://independent.academia.edu/M%C3%B3nicaParentis">Mónica Parentis</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Latin American Applied Research - An international journal</p><p class="ds-related-work--abstract ds2-5-body-sm">Three-aminopropyltriethoxysilane modified MCM-41 mesoporous silicas were synthesized by grafting the organic groups on the support surface, using different molar ratios of SiO2:Aminosilane. The synthesized solids were characterized by N2 adsorption, XRD, FTIR and TG-DTA. MCM-41 has a specific surface area of about 1500 m2/g, while that of the functionalized materials falls around 600 m2/g, showing a tendency to decrease as the content of the functionalizing agent grows. The N2 adsorption isotherms of pure and functionalized materials are characteristic of mesoporous type IV materials. The structural properties were studied by FTIR and XRD. TG-DTA studies allow analyzing the thermal stability of the materials and determining the deposited amine content. The aminosilane modified mesoporous silica materials increase the CO2 adsorption capacity compared to that of the pure MCM-41. The results obtained are well interpreted by Freundlich physicochemical model and the model parameters show...</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Amine-Grafted Mesoporous Silica for CO2 Capture","attachmentId":72204671,"attachmentType":"pdf","work_url":"https://www.academia.edu/57181857/Amine_Grafted_Mesoporous_Silica_for_CO2_Capture","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/57181857/Amine_Grafted_Mesoporous_Silica_for_CO2_Capture"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="7" data-entity-id="77072485" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/77072485/CO2_Adsorption_on_the_N_and_P_Modified_Mesoporous_Silicas">CO2 Adsorption on the N- and P-Modified Mesoporous Silicas</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="161994880" href="https://independent.academia.edu/MitovaVioleta">Violeta Mitova</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Nanomaterials</p><p class="ds-related-work--abstract ds2-5-body-sm">SBA-15 and MCM-48 mesoporous silicas were modified with functionalized (3-aminopropyl)triethoxysilane (APTES) by using the post-synthesis method, thus introducing N- and P-containing groups to the pore surface. The structure of the newly synthesized modifiers (aldimine and aminophosphonate derivatives of (3-aminopropyl)triethoxysilane and their grafting onto the porous matrix were proved by applying multinuclear NMR and FTIR spectroscopies. The content of the grafted functional groups was determined via thermogravimetric analysis. The physicochemical properties of the adsorbent samples were studied by nitrogen physisorption and UV–Vis spectroscopy. The adsorption capacity of CO2 was measured in a dynamic CO2 adsorption regime. The modified silicas displayed an enhanced adsorption capacity compared to the initial material. The 13C NMR spectra with high-power proton decoupling proved the presence of physically captured CO2. A value of 4.60 mmol/g was achieved for the MCM-48 material g...</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"CO2 Adsorption on the N- and P-Modified Mesoporous Silicas","attachmentId":84544370,"attachmentType":"pdf","work_url":"https://www.academia.edu/77072485/CO2_Adsorption_on_the_N_and_P_Modified_Mesoporous_Silicas","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/77072485/CO2_Adsorption_on_the_N_and_P_Modified_Mesoporous_Silicas"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="8" data-entity-id="11171062" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/11171062/Pilot_scale_production_of_mesoporous_silica_based_adsorbent_for_CO_sub_2_sub_capture">Pilot-scale production of mesoporous silica-based adsorbent for CO< sub> 2</sub> capture</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="26970521" href="https://independent.academia.edu/YKang3">Y Kang</a></div><p class="ds-related-work--metadata ds2-5-body-xs">2012</p><p class="ds-related-work--abstract ds2-5-body-sm">This study presents a pilot-scale spray drying system designed to manufacture spherical mesoporous silica particles (MSP) that is capable of producing up to 100 g per hour. The MSP fabricated via a nozzle pressure of 4 kg/cm 2 and a drying temperature of 200 • C possess a high specific area of 1012 m 2 /g, a narrow pore size distribution with an average pore diameter of 2.4 nm, and large pore volume of 0.81 cm 3 /g. They were further modified with a tetraethylenepentamine (TEPA-MSP) to enhance CO 2 adsorption selectivity from gas streams. The adsorption capacity of 15% CO 2 on TEPA-MSP was significantly influenced by adsorption temperature and water vapor of air streams, and reached a maximum of 87.05 mg/g (1.98 mmol/g) at 60 • C and 129.19 mg/g (2.94 mmol/g) at a water vapor of 6.98%. The adsorption capacities and the physicochemical properties of TEPA-MSP were preserved through 20 cycles of adsorption-desorption operation. A comparative study revealed that the TEPA-MSP had better adsorption performance of 15% CO 2 than the TEPA-modified granular activated carbon and zeolite. These results suggest that the TEPA-MSP can be stably employed in the prolonged cyclic CO 2 adsorption and that they possess good potential for CO 2 capture from flue gas.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Pilot-scale production of mesoporous silica-based adsorbent for CO\u003c sub\u003e 2\u003c/sub\u003e capture","attachmentId":46844637,"attachmentType":"pdf","work_url":"https://www.academia.edu/11171062/Pilot_scale_production_of_mesoporous_silica_based_adsorbent_for_CO_sub_2_sub_capture","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/11171062/Pilot_scale_production_of_mesoporous_silica_based_adsorbent_for_CO_sub_2_sub_capture"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="9" data-entity-id="97397765" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/97397765/Tuning_the_textural_properties_of_HMS_mesoporous_silica_Functionalization_towards_CO2_adsorption">Tuning the textural properties of HMS mesoporous silica. Functionalization towards CO2 adsorption</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="82694102" href="https://urjc.academia.edu/AmayaArencibia">Amaya Arencibia</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Microporous and Mesoporous Materials, 2018</p><p class="ds-related-work--abstract ds2-5-body-sm">HMS mesoporous silica materials were prepared using different amines as structure directing agents. Textural properties showed a clear dependence on the molecule used, with too long and too short amines yielding significantly distorted structures. CO 2 adsorbents were obtained by loading additional amino groups on supports before (as made) or after removing the structure directing agent (extracted and calcined). Organic loading was performed by grafting with diethylenetriaminetrimethoxysilane (DT) and by impregnation with polyethyleneimine (PEI). CO 2 adsorption analyses showed a higher CO 2 uptake and amine efficiency (defined as the molar ratio CO 2 /N) for uniformly-structured adsorbents. Besides, as-made materials showed the best CO 2 adsorption properties due to a synergistic effect between loaded amines and those already present in the support. The influence of adsorption temperature, operation cycles and CO 2 concentration was also studied. A maximum CO 2 uptake of 4.19 mmol CO 2 /g (184 mg CO 2 /g) was registered in pure CO 2 (90 ºC, 1 bar), while a value of 1.80 mmol CO 2 /g was found in direct air capture conditions (400 ppm CO 2 , 45ºC, 1 bar).</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Tuning the textural properties of HMS mesoporous silica. Functionalization towards CO2 adsorption","attachmentId":99030983,"attachmentType":"pdf","work_url":"https://www.academia.edu/97397765/Tuning_the_textural_properties_of_HMS_mesoporous_silica_Functionalization_towards_CO2_adsorption","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/97397765/Tuning_the_textural_properties_of_HMS_mesoporous_silica_Functionalization_towards_CO2_adsorption"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div></div></div><div class="ds-sticky-ctas--wrapper js-loswp-sticky-ctas hidden"><div class="ds-sticky-ctas--grid-container"><div class="ds-sticky-ctas--container"><button class="ds2-5-button js-swp-download-button" data-signup-modal="{"location":"continue-reading-button--sticky-ctas","attachmentId":106444275,"attachmentType":"pdf","workUrl":null}">See full PDF</button><button class="ds2-5-button ds2-5-button--secondary js-swp-download-button" data-signup-modal="{"location":"download-pdf-button--sticky-ctas","attachmentId":106444275,"attachmentType":"pdf","workUrl":null}"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span>Download PDF</button></div></div></div><div class="ds-below-fold--grid-container"><div class="ds-work--container js-loswp-embedded-document"><div class="attachment_preview" data-attachment="Attachment_106444275" style="display: none"><div class="js-scribd-document-container"><div class="scribd--document-loading js-scribd-document-loader" style="display: block;"><img alt="Loading..." src="//a.academia-assets.com/images/loaders/paper-load.gif" /><p>Loading Preview</p></div></div><div style="text-align: center;"><div class="scribd--no-preview-alert js-preview-unavailable"><p>Sorry, preview is currently unavailable. You can download the paper by clicking the button above.</p></div></div></div></div><div class="ds-sidebar--container js-work-sidebar"><div class="ds-related-content--container"><h2 class="ds-related-content--heading">Related papers</h2><div class="ds-related-work--container js-related-work-sidebar-card" data-collection-position="0" data-entity-id="63688158" data-sort-order="default"><a class="ds-related-work--title js-related-work-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/63688158/Investigation_of_adsorption_desorption_performance_by_aminopropyltriethoxysilane_grafted_onto_different_mesoporous_silica_for_post_combustion_CO2_capture">Investigation of adsorption/desorption performance by aminopropyltriethoxysilane grafted onto different mesoporous silica for post-combustion CO2 capture</a><div class="ds-related-work--metadata"><a class="js-related-work-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="92723496" href="https://independent.academia.edu/PailinMuchan">Pailin Muchan</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Clean Energy, 2020</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Investigation of adsorption/desorption performance by aminopropyltriethoxysilane grafted onto different mesoporous silica for post-combustion CO2 capture","attachmentId":76034999,"attachmentType":"pdf","work_url":"https://www.academia.edu/63688158/Investigation_of_adsorption_desorption_performance_by_aminopropyltriethoxysilane_grafted_onto_different_mesoporous_silica_for_post_combustion_CO2_capture","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline 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href="https://independent.academia.edu/MartinRavutsov">Martin Ravutsov</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Nanomaterials</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"CO2 Adsorption on Modified Mesoporous Silicas: The Role of the Adsorption Sites","attachmentId":74792501,"attachmentType":"pdf","work_url":"https://www.academia.edu/61866631/CO2_Adsorption_on_Modified_Mesoporous_Silicas_The_Role_of_the_Adsorption_Sites","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-related-work-grid-card-view-pdf" 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data-author-id="4257710" href="https://vit.academia.edu/MargandanBhagiyalakshmi">Margandan Bhagiyalakshmi</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Journal of Hazardous Materials, 2010</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Utilization of rice husk ash as silica source for the synthesis of mesoporous silicas and their application to CO 2 adsorption through TREN/TEPA grafting","attachmentId":48396767,"attachmentType":"pdf","work_url":"https://www.academia.edu/7616921/Utilization_of_rice_husk_ash_as_silica_source_for_the_synthesis_of_mesoporous_silicas_and_their_application_to_CO_2_adsorption_through_TREN_TEPA_grafting","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a 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href="https://independent.academia.edu/SubhashBhatia2">Subhash Bhatia</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Advances in Colloid and Interface Science, 2010</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Ordered mesoporous silica (OMS) as an adsorbent and membrane for separation of carbon dioxide (CO2)","attachmentId":49719679,"attachmentType":"pdf","work_url":"https://www.academia.edu/29271974/Ordered_mesoporous_silica_OMS_as_an_adsorbent_and_membrane_for_separation_of_carbon_dioxide_CO2_","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-related-work-grid-card-view-pdf" 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