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Spinel-type structure of Co in conditions of HDS catalyst aging
Institution:1. Faculty of Sciences, Institute of Physics, Trg Dositeja Obradovića 4, 21000 Novi Sad, Yugoslavia;2. Faculty of Technology, Bulevar Cara Lazara 1, 21000 Novi Sad, MinorYugoslavia;1. Centro de Investigación en Petroquímica, Instituto Tecnológico de Cd. Madero, Cd. Madero, Tamaulipas, 89440, Mexico;2. Instituto Mexicano del Petróleo, San Bartolo Atepehuacan, Ciudad de México, 07730, Mexico;3. CONACYT-Centro de Investigación en Química Aplicada, Saltillo, Coahuila, 25294, Mexico;4. Departamento de Ingeniería, TecNM/Instituto Tecnológico de Iztapalapa III, Ciudad de México, Mexico;1. Tecnológico Nacional de México – Instituto Tecnológico de Ciudad Madero, Centro de Investigación en Petroquímica, Prolongación Bahía Adair, Blvd. De las Bahias, Parque Industrial Tecnía, Altamira, Tamaulipas 89603, México;1. Institute of Petrochemical Processes, Azerbaijan National Academy of Sciences, Baku AZ1025, Azerbaijan;2. Institute for Micromanufacturing, Louisiana Tech University, 911 Hergot Avenue, Ruston, LA 71272, USA;3. Ennis-Flint Science and Technology Center, 4686 Turnpike Ct, Thomasville, NC 27360, USA;4. Ural Federal University, 19 Mira st., Ekaterinburg 620002, Russian Federation;1. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, 100081, China;2. Aerospace Research Institute of Materials & Processing Technology, China;3. China Academy of Launch Vehicle Technology, Beijing, 100076, China;1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266555, China;2. College of Chemical Engineering, China University of Petroleum, Qingdao 266555, China
Abstract:The structural investigation of CoO–MoO3/γ-Al2O3 HDS catalystassumed to accelerate aging in laboratory conditions followed by the DRS method pointed out the surface spinel formation The amount of spinel structure formed increased with increasing temperature and decreased with the treatment atmosphere in the order: nitrogen>air>steam On the basis of the experimental data of electronic d–d transitions of Co (II) ion in a catalyst treated in nitrogen atmosphere the parameter of the crystal-field splitting 10Dq and the energies of the electronic state of Co (II) in a spinel-type structure were calculated The most probable scheme of the molecular orbital has been proposed.
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