Effect of catalyst composition on the hydrodesulphurization and hydrodemetallization of atmospheric residual oil |
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| Affiliation: | 1. Catalysis and Chemical Reaction Engineering Laboratories, Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, SK S7N 5A9, Canada;2. Syncrude Edmonton Research Centre, Edmonton, AB T6N 1H4, Canada;1. Department of Chemistry, Ferdowsi University of Mashhad, P.O.Box: 9177948974, Mashhad, Iran;2. School of Chemistry, College of Science, University of Tehran, Tehran, Iran;3. Department of Chemical Engineering, Urmia University of Technology, Urmia, Iran;1. Infectious Diseases Department, CHU Hotel Dieu, University Hospital, Nantes, France;2. UIC 1413, INSERM, Nantes, France;3. Virology, CHU Hotel Dieu, University Hospital, Nantes, France;1. State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China;2. Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China |
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| Abstract: | A series of CoMo/Al2O3 catalysts containing a third additive, a Si, Ti, or P compound, were prepared using a consecutive impregnation method. The activities for the hydrodesulphurization (HDS), hydrodemetallization (HDM) and Conradson carbon residue (CCR) reduction of atmospheric residual oil were tested in a semi-batch basket type reactor. Cycle-aging tests were carried out for comparison of catalyst stability. The intrinsic rate constants of HDS from a semi-empirical calculation were used to test the coke tolerance of the catalysts. The CoMo/Al2O3 catalyst with a titanium compound added exhibited the highest activity enhancement for HDS and HDM reactions. It was also found that the surface activity maintenance can be effectively improved by the addition of an appropriate amount of titanium compound. The activity and stability of CoMo and NiMo catalysts for the HDS and HDM reactions were also compared. |
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