ZSM-5的水热改性及其在合成气经二甲醚制汽油中的应用  

Hydrothermal treatment of ZSM-5 and its application in syngas to gasoline via DME

作　　者：周振垒 李琢[1] 王博[1,2] 彭伟才[1] 李建青[1] 吴晋沪[1] 

机构地区：[1]中国科学院青岛生物能源与过程研究所生物燃料重点实验室,山东青岛266101 [2]中国科学院大学,北京100049

出　　处：《燃料化学学报》2013年第11期1349-1355,共7页Journal of Fuel Chemistry and Technology

基　　金：中国科学院对外合作重点项目(GJHZ1025);国家重点基础研究发展规划(973计划;2011CB201502);"十二五"农村领域国家科技计划(2011BAD22B06-01);中国科学院重大装备项目(Y2010022)

摘　　要：对合成气经二甲醚制汽油两段等压反应系统中的ZSM-5分子筛催化剂进行原位水热处理,研究了不同温度下水蒸气处理ZSM-5分子筛的结构、表面酸性及催化反应性能。XRD、XRF、BET、NH3-TPD和TPO等表征手段表明,水热处理温度为400℃时会使ZSM-5分子筛大部分非骨架铝脱除,酸中心数量减少,比表面积增加,提高了催化剂的活性及产物选择性。The effects of in-situ hydrothermal treatment on the ZSM-5 zeolite were studied, and its performance for syngas to gasoline via DME reaction process was dicussed using two-stage equal-pressure reactor system. The texture, surface acidity and catalytic performance of the treated ZSM-5 zeolite at different temperatures were investigated. Physicochemical properties of the zeolite were characterized by XRD, XRF, BET, NH3-TPD and TPO. The results indicated that most of A1 was removed from the nonframework of zeolite through appropriate hydrothermal treatment at 400 ~C. A decrease in the amount of acidic sites and an increase of specific surface area were observed, and accordingly, the catalytic activity of the ZSM-5 zeolite and product selectivity were improved significantly.

关 键 词：ZSM-5 水热处理 合成气 二甲醚 汽油 

分 类 号：O643.3[理学—物理化学]