首页 | 本学科首页   官方微博 | 高级检索  
     检索      

含有多级孔复合分子筛的复合催化剂上合成气一步制二甲醚
引用本文:王琰,王文丽,陈月仙,郑家军,李瑞丰.含有多级孔复合分子筛的复合催化剂上合成气一步制二甲醚[J].燃料化学学报,2013,41(7):875-882.
作者姓名:王琰  王文丽  陈月仙  郑家军  李瑞丰
作者单位:1. Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, China; 2. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
基金项目:National Natural Science Foundation of China(21246003);Research Fund for Doctoral Program of Higher Education(20121402120011)
摘    要:以Beta分子筛为核、Y型分子筛为壳层的多级孔复合分子筛(BFZ)作为甲醇脱水催化剂用于固定床中合成气一步法制备二甲醚,并与纯Y型分子筛进行了比较,研究了二甲醚合成催化反应活性与甲醇脱水催化剂孔道结构和酸性之间的关系.结果表明,复合分子筛HBFZ具有中等强度的酸性和中孔孔道结构,有利于提高合成气制备二甲醚的催化反应活性.二甲醚直接合成催化剂由工业CuO/ZnO/Al2O3催化剂(CZA)与分子筛(HBFZ、HY)采用机械混合方法制备;催化评价结果显示,CZA/HBFZ比CZA/HY具有更优的催化活性和稳定性.在250 ℃, 5.0 MPa 和 1 500 h-1的反应条件下,CZA/HBFZ催化剂上CO的转化率和DME的选择性分别达到94.2%和67.9%.

关 键 词:复合分子筛  二甲醚  复合催化剂  多级孔结构  合成气  甲醇脱水  
收稿时间:2013-04-11

Synthesis of dimethyl ether from syngas using a hierarchically porous composite zeolite as the methanol dehydration catalyst
WANG Yan,WANG Wen-li,CHEN Yue-xian,ZHENG Jia-jun,LI Rui-feng.Synthesis of dimethyl ether from syngas using a hierarchically porous composite zeolite as the methanol dehydration catalyst[J].Journal of Fuel Chemistry and Technology,2013,41(7):875-882.
Authors:WANG Yan  WANG Wen-li  CHEN Yue-xian  ZHENG Jia-jun  LI Rui-feng
Institution:1.Institute of Special Chemicals,Taiyuan University of Technology,Taiyuan 030024,China;2.College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
Abstract:Hierarchically porous composite zeolite (BFZ, with Beta zeolite cores and Y zeolite polycrystalline shells) was employed as the methanol dehydration catalyst in the direct synthesis of dimethyl ether (DME) from syngas in a fixed-bed reactor. The correlation between the catalytic activity and the textural and acid properties of the dehydration catalyst was investigated. The results indicate that the composite zeolite of H-form (HBFZ) exhibits moderate acid strength and meso-porosity, which is responsible for the high activity of CO hydrogenation. For the direct synthesis of DME from CO hydrogenation over the physical mixture of commercial CuO/ZnO/Al2O3 catalyst (CZA) and the H-form zeolites (HBFZ or HY), CZA/HBFZ exhibits higher activity and stability than CZA/HY. Under 250 ℃, 5.0 MPa and 1 500 h-1, the conversion of CO and the selectivity to DME over CZA/HBFZ achieve 94.2% and 67.9%, respectively.
Keywords:composite zeolite  dimethyl ether  hybrid catalysts  hierarchical pore structure  syngas  methanol dehydration  
本文献已被 CNKI 等数据库收录!
点击此处可从《燃料化学学报》浏览原始摘要信息
点击此处可从《燃料化学学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号