Title: Active olefin producing reaction cycles during methanol conversion in H-SAPO-34: an ab initio study
Abstract: The quest for chemical processes based on alternative feedstock was initiated by the depletion of oil reserves and the rapidly increasing demand for base chemicals such as ethylene and propylene. The methanol-to-olefin process (MTO), using natural gas, coal or biomass as raw material, is one of the most important alternatives for olefin production. MTO conversion occurs in acidic zeolites or zeotype catalysts. H-SAPO-34, the archetypal MTO catalyst exhibiting the chabazite topology with a 3-dimensional 8ring channel structure with elliptic cages at the channel intersections, shows the best performance for industrial applications and the highest selectivity toward light olefins.[1] The generally accepted reaction mechanism for MTO is based on a hydrocarbon pool (HP), in which organic molecules (predominantly polymethylbenzenes) trapped within the anorganic zeolite framework act as co-catalysts.[2] It is believed that these polymethylbenzenes play a crucial role in the olefin elimination reactions.[3] To date, no decisive answer exists to the question which mechanism is responsible for olefin production in H-SAPO-34.[4,5]
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot