Mg-SAPO-34分子筛的微波合成及其对甲醇制烯烃反应的催化性能  

SYNTHESIS OF Mg-APO-34 MOLECULAR SIEVE WITH MICROWAVE IRRADIATION AND ITS CATALYTIC PERFORMANCE IN METHANOL-TO-OLEFINS REACTION

作　　者：魏廷贤[1] 高丽娟[1] 赵天生[1] 

机构地区：[1]宁夏大学能源化工重点实验室,宁夏银川750021

出　　处：《石油学报（石油加工）》2009年第6期841-845,共5页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：科技部重大基础研究前期专项(2005CCA00700);教育部科学技术研究重点项目(203143)资助

摘　　要：采用微波辐射法水热合成了Mg-SAPO-34分子筛,并采用XRD、BET、FT-IR和NH3-TDP手段对合成的Mg-SAPO-34进行了表征。考察了微波辐射时间、功率对合成Mg-SAPO-34的影响,也考察了Mg-SAPO-34样品对甲醇制烯烃反应(MTO)的催化性能。结果表明,采用微波辐射法合成Mg-SAPO-34分子筛的最佳辐射功率450W,最佳辐射时间45min。微波合成的Mg-SAPO-34分子筛用于MTO催化反应,甲醇的转化率达100%,乙烯的选择性为55.3%,丙烯选择性为31.35%,低碳烯烃总选择性达到86.65%。Mg-SAPO-34 molecular sieve was synthesized hydrothermally under microwave irradiation. Effects of microwave irradiation power and time on the Mg-SAPO-34 synthesis were investigated. The sample was characterized by XRD, BET, FT-IR and NH3-TDP techniques and used as catalyst in the methanol-to-olefins （MTO） reaction. The results showed that the optimal microwave irradiation power and time for the synthesis of Mg-SAPO-34 were 450 W and 45 min respectively. Mg-SAPO-34 synthesized by microwave heating exhibited excellent catalytic activity for MTO reaction, in which methanol conversion, the selectivity of ethylene and selectivity of propylene reached 100%, 55.3% and 31. 35% respectively. The selectivity of total light olefins in MTO reaction was 86.65 %.

关 键 词：杂原子分子筛 SAPO-34 微波 MTO反应 

分 类 号：TQ116.2[化学工程—无机化工]