研究了几种分子筛在乙基化反应中的积炭过程,并与分子筛的酸性、孔结构等参数关联,阐明了ZSM-5分子筛催化剂的酸中心对积炭起着主要作用。酸强度越高,越容易积炭,酸量越大积炭越多。积炭的形成部位与酸中心在晶内外的分布关系密切。分子筛外表面酸中心比晶内的更易生成积炭,体现了积炭的择形性。 The coke deposition process of several zeolites in ethylation reaction was studied and correlated with the acidity, pore structure and other parameters of the zeolites. It was clarified that the acid sites of ZSM-5 zeolite catalysts played a major role in carbon deposition. The higher the acid strength, the easier coke, the greater the amount of acid deposition more. The formation of coke and acid sites in the distribution of the crystal inside and outside the close relationship. The acid center on the outer surface of molecular sieve is more likely to form coke than intragranular, which reflects the shape selectivity of coke.