分子筛孔结构和酸性对二甲苯异构化反应性能影响

我们成功合成了几种具有典型结构的分子筛,并考察了这些分子筛的孔结构、酸性以及在碳八芳烃异构化反应中的反应性能.结果表明,对于碳八芳烃异构化反应,孔结构和酸性起着重要作用,孔结构决定了反应的类型或方式,而酸性质与反应的活性和选择性密切相关,一个好的碳八芳烃异构化催化剂要同时具备适宜的孔道结构和酸性.

Effect of pore structure and acidity of

In this paper, several molecular sieves with typical structures have been successfully synthesized. The pore structure and acidity of these molecular sieves were characterized by BET and NH3-TPD. Furthermore, the catalytic performance of these molecular sieves was investigated in xylene isomerization. The results indicated that the pore structure and acidity of catalysts are the key factors for xylene isomerization, the former is responsible the reaction type, while the latter was closely related to the reaction activity and selectivity. The xylene isomerization catalyst with high performance should have appropriate pore structure and acidity, especially a high ratio of medium strong acid sites.