英语语法分析

An ethylation catalyst Z937 with suitable stability were prepared on THD basis of NL.

在NL原粉基础上，制备了具有一定稳定性的乙基化催化剂z937。

Ethylation selectivity, was affected by strength of surface acid sites, location of acid sites and pore structure.

乙基化的选择性则与催化剂的表面酸强度、酸性中心位置和孔道结构等因素有关。