The effects of the zeolite structure and the Brønsted and Lewis sites on the activity and selectivity in alkylation of benzene with ethylene to ethylbenzene were investigated using three series of zeolites with different structures, Si/Al ratios and contents of Lewis sites. The 12-membered three-dimensional channels of beta zeolite (*BEA) provide higher selectivity to ethylbenzene compared to faujasite zeolite (FAU) with cavities in which the di-alkylated and heavier by-products are formed. The activity is controlled by the concentration of Brønsted acidic sites, while Lewis sites do not contribute to the activity or affect the selectivity. The highest activity and selectivity are obtained using Al-rich H-*BEA (Si/Al 4.2) with a high density of Brønsted groups in a well-defined channel structure sterically constrained for heavy by-products. It is shown that a three-dimensional channel structure with Brønsted acid sites in a shape selective environment is a key parameter controlling the activity and selectivity.

使用三种结构，硅/铝比和路易斯位点含量不同的三类沸石，研究了沸石结构以及布朗斯台德和路易斯位点对苯与乙烯烷基化为乙苯的活性和选择性的影响。与具有形成二烷基化和较重副产物的空腔的八面沸石（FAU）相比，β沸石（* BEA）的12元三维通道提供了更高的乙苯选择性。活性受布朗斯台德酸性位点的浓度控制，而路易斯位点对活性没有贡献或不影响选择性。使用富含Al的H- * BEA（Si / Al 4.2）和高密度的Brønsted基团，在明确限定的通道结构中对重质副产物进行空间限制，可获得最高的活性和选择性。