Recent Advancements of SAPO-34 and ZSM-5 Zeolite in Converting Methanol to Olefin: A Review

In recent years, the conversion of methanol to olefins (MTO) over acidic zeolite catalysts as a non-petroleum alternative for producing light olefins has attracted considerable interest. This paper comprehensively reviews recent advancements in modifying SAPO-34 and ZSM-5 zeolites for MTO reaction and performs a bibliometric analysis to gain insight into trends in the field. The study covers the utilization of zeolites in MTO technology, elucidating the process flow configuration and emphasizing the pivotal factors affecting the zeolite catalyst performance in conversion of methanol to olefin. The various modifications of SAPO-34 and ZSM-5 catalysts are extensively discussed, focusing on the intricate modifications such as alterations in the silicon-alumina ratio, utilization of structure directing agents, creation of core–shell structures, and introduction of metals. The catalyst modification significantly affects MTO outcomes, with various alterations showing the potential to enhance selectivity, propylene-to-ethylene ratio, and catalytic stability, offering prospects for selective light olefin production in the MTO process.