TY - JFULL AU - Salvatore L. and Pires B. and Campos M. C. M. and De Souza Jr M. B. PY - 2007/1/ TI - A Hybrid Approach to Fault Detection and Diagnosis in a Diesel Fuel Hydrotreatment Process T2 - International Journal of Chemical and Molecular Engineering SP - 154 EP - 160 VL - 1 SN - 1307-6892 UR - https://publications.waset.org/pdf/3224 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 12, 2007 N2 - It is estimated that the total cost of abnormal conditions to US process industries is around $20 billion dollars in annual losses. The hydrotreatment (HDT) of diesel fuel in petroleum refineries is a conversion process that leads to high profitable economical returns. However, this is a difficult process to control because it is operated continuously, with high hydrogen pressures and it is also subject to disturbances in feed properties and catalyst performance. So, the automatic detection of fault and diagnosis plays an important role in this context. In this work, a hybrid approach based on neural networks together with a pos-processing classification algorithm is used to detect faults in a simulated HDT unit. Nine classes (8 faults and the normal operation) were correctly classified using the proposed approach in a maximum time of 5 minutes, based on on-line data process measurements. ER -