个人信息Personal Information
副教授
博士生导师
硕士生导师
主要任职:Associate Professor
其他任职:系教工党支部书记
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:化工学院
学科:工业催化. 能源化工
办公地点:大连理工大学西校区化工实验楼B421
电子邮箱:lium@dlut.edu.cn
Shape-selective methylation of aromatics with methanol over modified nanoscale-HZSM-5 catalysts
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论文类型:会议论文
发表时间:2011-01-01
收录刊物:Scopus
摘要:In this paper, nanoscale NaZSM-5 zeolite was synthesized by the hydrothermal crystallization from a gel consisting of sodium silicate, aluminium sulphate, butylamine, sulfuric acid and deionized water in a stainless steel autoclave at 100 C for 24 h, then 170 C for 48 h. The crystal size of the catalyst is 70-100 nm. Nanoscale HZSM-5 has more pore openings, more accessible acid sites, larger external surface area and the secondary pores which favor the diffusion of reactants and products further increase the reaction activity and the ability to resist coking during reactions. The nanoscale HZSM-5 zeolite modified with P-Mg-Si and further modified with Ni metal showed excellent stability and p-xylene selectivity in the alkylation of toluene with methanol. The selectivity for p-xylene of more than 98.3% with toluene conversion of about 25.0% was achieved during 500 h time on stream. Through changing the template and base treatment, nano-ZSM-5 and hollow ZSM-5 were obtained and their catalytic performances were compared in the shape-selective methylation of toluene. Moreover, the utilization of methanol is more than 80% by adjusting the ratio of toluene to methanol.