当前位置: X-MOL 学术Russ. J. Appl. Chem. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Alkylation of Toluene with tert -Butyl Alcohol over Different Zeolites with the Same Si/Al Ratio
Russian Journal of Applied Chemistry ( IF 0.6 ) Pub Date : 2020-08-19 , DOI: 10.1134/s1070427220070071
Yuanyuan Wang , Hua Song , Yixian Han , Xinglong Sun , Jiaojing Zhang , Wenyi Wang , Xueqin Wang

Abstract

Three zeolites (Beta, Mordenite and ZSM-5), which present different pore channels but the same Si/Al ratio (25), were used as catalysts to investigate the effects of acidity and channel structure on the catalytic activity for toluene butylation at 180°C in an automated high-pressure stainless steel reactor. The same Si/Al ratio of the three zeolites did not result in a similar catalytic activity, since both acidity and channel structures of zeolites can affect catalytic activity. Zeolite Beta possessing a 3D 12-ring channel system, the smallest crystal size and larger amount of B acid sites exhibited the highest toluene conversion (54.0%). Mordenite, with 32.7% toluene conversion, presented higher para-selectivity than Beta, which can be explained by the shape-selective catalysis. ZSM-5 with the largest amount of B acid sites showed the lowest catalytic activity, since alkylation can occur only on the surface active sites.


中文翻译:

相同硅铝比的不同沸石上甲苯与叔丁基醇的烷基化

摘要

使用三种沸石(β,丝光沸石和ZSM-5),它们具有不同的孔道但相同的Si / Al比(25)作为催化剂,研究酸度和通道结构对180℃下甲苯丁基化催化活性的影响。 °C在自动高压不锈钢反应器中。三种沸石的相同Si / Al比不会导致相似的催化活性,因为沸石的酸性和通道结构都会影响催化活性。Beta沸石具有3D 12环通道系统,最小的晶体尺寸和大量的B酸位点表现出最高的甲苯转化率(54.0%)。丝光沸石,以32.7%的甲苯转化率,较高的呈现选择性比β高,这可以通过形状选择性催化来解释。具有最多B酸位的ZSM-5表现出最低的催化活性,因为烷基化只能发生在表面活性位上。
更新日期:2020-08-19
down
wechat
bug