Preparation of Hierarchical Porous and Tunable Silicon Microenvironment SAPO-18 Sheets for Methanol-to-Olefins

• DOI: 10.1021/acs.iecr.3c00193
• Publication Date: 2023-05-24T07:04:08Z
• Authors: Zhaojun Gao; Qunfei Wang; Tao Yan; Kaiwen Zhao; Wenqi Liu; Qin He; Qiming Sun; Zhongfu Li; Jingyan Zhang; Conghua Liu
• Keywords: Cationic polymerization; Porous Silicon

In this study, hierarchically porous SAPO-18 catalysts with abundant intracrystalline mesopores were designed and fabricated a cost-effective non-surfactant cationic surfactant (polydimethyldiallylammonium chloride, PDADMAC) as pore-forming agent, morphology regulator, silicon inducer by one-step method. PDADMAC promoted the introduction of atoms in framework, making hierarchical sheets present optimized acidity. With combination structure suitable acid density, exhibited threefold improvement catalytic lifetime 4% increase ethylene propylene selectivity during methanol-to-olefin (MTO) reaction, compared conventional zeolite.