改性HZSM-5对甲醇制汽油反应性能的影响

对HZSM-5分子筛改性是提高甲醇制汽油反应催化性能的有效方式,分别用非金属、稀土金属及水热处理对HZSM-5分子筛催化剂进行改性,考察改性方法对HZSM-5分子筛酸性、孔径和比表面积等性质的影响,同时对改性HZSM-5分子筛催化剂催化甲醇制汽油的汽油收率和芳烃含量等指标进行比较。结果表明,经La改性的催化剂可明显提高汽油收率,水热处理的催化剂反应产物汽油中的均四甲苯含量大幅增加。改性催化剂对反应的影响可一定程度验证相关理论。

Catalytic activity of modified HZSM-5 catalyst for methanol-to-gasoline reaction

Modification of HZSM-5 molecular sieve is an effective way to improve the catalytic performance for methanol to gasoline.HZSM-5 zeolite catalyst is modified with nonmetal,rare earth metal and hydrothermal treatment respectively.Effects of these modification methods on acidity,pore size and surface area of HZSM-5 zeolite were investigated.Meanwhile,gasoline yield and aromatic hydrocarbon content of modified HZSM-5 zeolite catalysts were studied.The results showed that yield of gasoline could be obviously increased over La modified catalyst,and content of durene in gasoline produced on hydrothermal treated catalyst is greatly increased.Influence of modified catalysts on reaction can verify the relevant theory to some extent.