The methanol-to-olefins (MTO) process is a key catalytic route for light olefin production. yet challenges related to catalyst deactivation and coke formation persist. In this study. we investigate the catalytic performance of SAPO-34 (SP) and a modified SAPO-34 catalyst incorporating a mixed metal oxide of indium oxide and cerium oxide (SPM) to enhance selectivity. https://parisnaturalfoodes.shop/product-category/echinacea-with-goldenseal-root/