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ZSM-5–SBA-15复合分子筛的制备
作者:    
单位:辽宁石油化工大学石油化工学院 辽宁抚顺 113001 
关键词:ZSM-5–SBA-15 复合分子筛 甲苯 甲醇 烷基化 对二甲苯 
分类号:O613.7
出版年,卷(期):页码:2015,43(7):875-881
DOI:10.14062/j.issn.0454-5648.2015.07.05
摘要:

 采用后合成法合成了ZSM-5–SBA-15微介孔复合分子筛,考察了m(ZSM-5)/m(SBA-15)、晶化时间、盐酸量、焙烧温度对烷基化催化性能的影响。在m(ZSM-5)/m(SBA-15)=0.2,晶化时间为18 h,盐酸量为20 mL,焙烧温度为550 ℃条件下,合成的复合分子筛催化剂的甲醇转化率为94.93%,对二甲苯选择性为45.46%。惰性SBA-15介孔分子筛抑制了ZSM-5外表面酸性,提高了对二甲苯的选择性。

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 The micro-mesoporous composite molecular sieves of ZSM-5–SBA-15 were synthesized via a post synthesis. The influences of mass ratio of ZSM-5/SBA-15, crystallization time, acid content and calcination temperature on the preparation of the composite molecular sieves were investigated. The ZSM-5–SBA-15 prepared at the mass ratio of ZSM-5/SBA-15 of 0.2, crystallization time of 18 h, acid content of 20 mL and calcination temperature of 550 ℃ has a conversion rate of methanol of 94.93% and a selectivity of para-xylene of 45.46%. The acidity on the surface of ZSM-5 is reduced by mesoporous molecular sieve of nonvalent SBA-15, thus improving the selectivity of para-xylene.

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基金项目:
作者简介:
刘 鹏(1987—),男,硕士研究生。
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