Low-Temperature Nonoxidative Dehydrogenation of Propane over Sn-promoted Mo-Y Zeolite: Catalytic performance and nature of the active sites

• Published in: Fuel (Guildford) Vol. 323; p. 124350
• Main Authors: Agrawal, Ankit, Singh, Omvir, Kumar Yadav, Ashok, Tripathi, Shailendra, Ray, Anjan, Pawar, Vivek, Sarkar, Bipul
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.09.2022; Elsevier BV
• Subjects: Alkenes; Bimetallic catalyst; Catalysts; Dehydrogenation; Fine structure; Low temperature; Metals; Mo-Sn catalyst; Propane; Propane dehydrogenation; Propylene; Refineries; Structural analysis; Ultrastructure; X ray absorption; XAS studies; Zeolites; Propylene; Propane dehydrogenation; Bimetallic catalyst; Mo-Sn catalyst; XAS studies
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2022.124350

[Display omitted] •Olefins are by far the most valuable petrochemical intermediates, they are widely used as raw materials for polymers, plastics, fibres, etc.•A series of Mo-Sn based catalysts have been synthesized to explore the possibility of dehydrogenation at a lower temperature.•Extended X-ray absorption fine structure analysis suggested the Mo-O and Sn-O species were highly dispersed.•No intermetallic interactions of Mo-Sn were observed by XAS studies.•A propylene yield of 40.94% was achieved at 450 °C over MoSn/Y catalyst. Owing to its higher value and ever-growing market, the production of light olefins is more attractive for many refineries. Among the existing routes, on-purpose dehydrogenation technologies seek special attention for the production of light olefins. Here we report a Mo-based bi-metallic catalyst exhibiting highly selective, active and stable for the direct dehydrogenation of propane to propylene. A comprehensive surface study of the MoSn/Y catalyst has been acquired to understand the interatomic interactions between metals. Extended X-ray absorption fine structure analysis suggested the Mo-O species is highly dispersed along with Sn-O. The structure-yield relationship illustrates that the Pt does not affect the catalytic performance when compared to Pt free system. We achieved a 40.94% propylene yield over MoSn/Y catalyst with the gradual coke deposition rate of 5.4x10-3 gcoke.gcat-1.h−1.