La改性HZSM-5分子筛催化剂甲醇转化制汽油反应性能研究  

Catalytic performance of La-modified HZSM-5 catalysts for methanol to gasoline reaction

作　　者：朱辉[1] 黄慧文[1] 张善鹤 张强[1] 李春义[1] ZHU Hui;HUANG Hui-wen;ZHANG Shan-he;ZHANG Qiang;LI Chun-yi(State Key Laboratory of Heavy Oil Processing, China University of Petroleum （East China） , Qingdao 266580, Chin)

机构地区：[1]中国石油大学(华东)重质油国家重点实验室,山东青岛266580

出　　处：《燃料化学学报》2018年第5期564-568,共5页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21406270)资助~~

摘　　要：采用浸渍法制备了La改性HZSM-5分子筛催化剂,利用X射线衍射(XRD)、氮气吸附-脱附、氨气程序升温脱附(NH3-TPD)以及吡啶吸附红外光谱(Py-FTIR)技术对催化剂进行表征,并在固定床微型反应评价装置上,在反应温度350℃,系统压力0.1 MPa,甲醇质量空速4.74 h-1的条件下,考察La改性HZSM-5分子筛催化剂的甲醇转化制汽油反应性能。结果表明,La改性HZSM-5分子筛催化剂的酸量降低,比表面积和孔容减小。La负载量为4%时,其M TG反应性能最佳,催化剂的寿命和汽油收率分别由改性前的12 h和52.69%增加到16 h和59.28%。此外,随着La负载量的增加,汽油中芳烃含量显著降低,降幅达18%。La-modified HZSM-5 catalysts were prepared by impregnation method,and characterized by XRD,NH3-TPD,Py-FTIR and N2 adsorption/desorption techniques. Their catalytic performance in methanol to gasoline（ MTG） reaction was evaluated in a fixed-bed tubular reactor at 350 ℃ and WHSV of 4.74 h-1 under ambient pressure. The results showthat the introduction of La decreased the amount of acid sites,specific surface area and pore volume of HZSM-5 catalyst. The catalyst with La loading of 4% exhibited the best catalytic performance in MTG reaction,over which the lifetime and gasoline yield increased from 12 h and 52.69% to 16 h and 59.28%,respectively. In addition,the selectivity to aromatics in gasoline decreased markedly by 18% with increasing La content.

关 键 词：甲醇转化制汽油 HZSM-5分子筛 LA 

分 类 号：TQ536.9[化学工程—煤化学工程]