Synthesis of mes-microporous SAPO-34 molecular sieve via FW-200 and its application in MTO
WU Xiao-na1, SUN Na1,2, WU Hai-lin1, YANG Zhan-xu1, WANG Hai-yan1,2
1. College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, China; 2. College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China
Abstract: In order to solve the problem of the deactivation of SAPO-34 in the process of methanol to olefins (MTO),different amount of FW-200 are added in the gel during the hydrothermal synthesis process.The effects of different addition amounts of FW-200 on SAPO-34 catalyst's pore diameter,morphology,acidity and catalytic performance in MTO are studied.The synthesized samples are characterized by XRD,SEM and NH3-TPD.The performance of mes-SAPO-34 molecular sieve in MTO is studied with methanol as raw material.The result indicates that when the adding amount of carbon template reaches 8%,the crystal structure and crystallinity of SAPO-34 molecular sieve is not affected significantly while the molecular sieve have the most mesoporous and the largest mesoporous volume.Meanwhile,its acid distribution reaches the best and its performance exhibits better in MTO.Moreover,the catalyst has the longest service life and the total yield of ethylene and propylene can reach 86.77%.
吴晓娜, 孙娜, 吴海琳, 杨占旭, 王海彦. FW-200合成微孔-介孔SAPO-34分子筛及其在MTO中的应用[J]. 现代化工, 2019, 39(2): 79-82,84.
WU Xiao-na, SUN Na, WU Hai-lin, YANG Zhan-xu, WANG Hai-yan. Synthesis of mes-microporous SAPO-34 molecular sieve via FW-200 and its application in MTO. Modern Chemical Industry, 2019, 39(2): 79-82,84.
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