Study on Properties of Co-S-1 Zeolite and its Performance in Chemical Looping Oxidative Dehydrogenation of Propane

Propylene is an important industrial basic material, and propane dehydrogenation is an important industrial process for producing propylene.Compared with the current industrial process of direct dehydrogenation of propane.Oxidative dehydrogenation can generate heat for the reaction through direct oxidation of generated H2, significantly reducing the process energy consumption, and because of the consumption of H2, it can impact the reaction equilibrium and improve the conversion.In various processes of oxidative dehydrogenation, chemical looping oxidative propane dehydrogenation provide oxygen atoms through solid oxygen carrier.Due to the generated propylene will not be oxidized to COx, so it can obtain the highest selectivity of propylene, is the most promising method of propane dehydrogenation.In this research, a supported oxygen carrier compound was prepared using industrial alumina carrier, and its oxygen carrying performance was characterized.In addition, two different Co-S-1 catalysts containing Co on S-1 zeolite were prepared by in-situ synthesis and impregnation methods, which show stable propane dehydrogenation performance.Their physical properties were characterized by XRD, BET, IR, SEM, and comparative analysis.Using a fixed bed reactor, both Co-S-1 catalysts alone and mixing with oxygen carrier was loaded into the catalyst bed, to carry out propane dehydrogenation catalytic reaction.Co-S-1 showed high catalytic activity, and the catalytic activity is improved after coupling with oxygen carrier.Co-S-1 prepared by impregnation method has similar propane dehydrogenation activity to Co-S-1 synthesized in situ, and can be coupled with oxygen carriers prepared by industrial carriers to improve catalytic conversion activity, and has high industrial application potential.