摘要
以硝酸镁、硝酸铈为前躯物,考察镁单独改性和镁、铈复合改性对多级孔ZSM-5分子筛催化苯和甲醇烷基化反应性能的影响,并以镁、铈复合改性的多级孔ZSM-5分子筛为催化剂,考察工艺条件对苯和甲醇烷基化反应的影响。结果表明,在反应温度为773 K、质量空速为8 h-1、反应压力为0.18 MPa、n(甲醇)/n(苯)=0.9的条件下,多级孔ZSM-5分子筛通过镁、铈复合改性后,苯的转化率达到51%以上,甲苯、二甲苯的选择性达到90%以上。寿命试验表明该催化剂连续运行400 h,稳定性良好,具有优良的工业应用价值。
The influence of magnesium and cerium composite modification of hierarchical porous ZSM-5 on methylation of benzene with methanol was investigated.Magnesium nitrate and cerium nitrate were used as precursors.The effects of process conditions of the methylation were studied over the modified ZSM-5 catalyst.The results showed that at the conditions of 773 K,0.18 MPa,WHSV of 8 h-1,n(benzene)/n(methanol)=0.9,the conversion rate of benzene was 51%,and the selectivity of toluene and xylene was greater than 90%over the Mg and Ce modified hierarchically ZSM-5.After 400 hours on stream,the catalysts still exhibited excellent stability,indicating its excellent industrial application value.
作者
闻振浩
刘澄虎
赵悌军
朱化雨
朱学栋
Wen Zhenhao;Liu Chenghu;Zhao Tijun;Zhu Huayu;Zhu Xuedong(School of Chemistry & Chemical Engineering,Linyi University,Linyi,Shandong 276000;Linyi Taier Chemical Technology Co.Ltd.;State Key Laboratory of Chemical Engineering,East China University of Science and Technology)
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2020年第1期37-42,共6页
Petroleum Processing and Petrochemicals
基金
山东省自然科学基金资助项目(ZR2018LB028)
