选用无模板法合成的ZSM-5为催化剂母体，对其进行浸渍法改性，研究其在固定床上催化甲苯-乙醇烷基化合成对甲乙苯的性能。考察了Si、P、Mg单组分改性无模板ZSM-5所得催化剂的反应性能，研究了Si、P、Mg多组分复合改性所得催化剂的烷基化反应性能，并结合相关表征进行了分析讨论。结果表明，在甲苯-乙醇烷基化反应中，采用的无模板合成的ZSM-5催化剂具有与商业有模板合成的ZSM-5催化剂相当的反应性能；Si、P、Mg多组分联合改性的催化剂可以获得高对位选择性甲乙苯产品，8Si-9P-6Mg/HZSM-5催化剂具有很好地择形催化效果，其乙醇转化率为100%，甲苯转化率可达9%以上，对甲乙苯选择性高达99%以上。

In order to prepare p-ethylbenzene via alkylation between toluene and ethanol,ZSM-5 synthesized by a template-free method is selected as catalyst parent to be modified by impregnation method.The modified ZSM-5 catalysts are applied in the fixed-bed alkylation of toluene with ethanol to p-ethylbenzene to evaluate their catalytic properties.The reaction properties of Si,P and Mg modified template-free ZSM-5 catalysts are investigated.The properties of Si,P and Mg catalysts in alkylation are studied,and discussed in combination with related characterization.Results show that ZSM-5 catalyst synthesized without template exhibits the same reaction performance in the alkylation of toluene with ethanol as that the commercial ZSM-5 one synthesized with template does.The Si,P and Mg modified template-free ZSM-5 catalysts can deliver high selectivity of para-methylethylbenzene.The 8Si-9P-6Mg/HZSM-5 catalyst can show an excellent catalytic performance,over which the conversion rate of ethanol can reach 100%,the conversion of toluene exceeds 9% and the selectivity of p-methylethylbenzene exceeds 99%.

徐耀东(1996-),男,硕士研究生,研究方向为ZSM-5择形催化,18340833831@163.com;张雄福(1963-),男,博士,教授,研究方向为分子筛合成与催化、膜分离,通讯联系人,xfzhang@dlut.edu.cn。