合成气一步法制备二甲醚核壳结构催化剂的制备及其反应性能

王文丽; 王琰; 陈月仙; 赵文超; 李瑞丰

合成气一步法制备二甲醚核壳结构催化剂的制备及其反应性能

太原理工大学精细化工研究所, 山西太原 030024

基金项目: 山西省青年科技研究基金(2013021008-3); 太原市科技项目(120247-23).

详细信息

通讯作者:
王琰

中图分类号: O643
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出版历程
- 收稿日期: 2013-05-25
- 修回日期: 2013-06-10
- 刊出日期: 2013-08-30

Preparation of core-shell catalysts for one-step synthesis of dimethyl ether from syngas

Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, China

摘要

摘要: 以生物质(葡萄糖、蔗糖、淀粉)为模板剂,通过水热合成法制备具有核壳结构的CuO-ZnO-Al₂O₃@Al₂O₃复合催化剂,该催化剂以甲醇合成催化剂CuO-ZnO-Al₂O₃为核,甲醇脱水催化剂Al₂O₃为壳.SEM-EDS对催化剂核壳结构的表征发现,通过改变水热合成温度和合成时间可以调变催化剂中Al₂O₃壳层的厚度.将该复合催化剂用于合成气直接制备二甲醚的反应,在空速1 500 mL/(h·g_cat)、温度260 ℃、压力5.0 MPa的条件下,CO转化率和二甲醚选择性分别达到35.2%和61.1%.
- 核壳双功能催化剂 /
- 合成气 /
- 二甲醚
Abstract: A core-shell catalyst CuO-ZnO-Al₂O₃@Al₂O₃ for one-step synthesis of dimethyl ether from synthesis gas was prepared using glucose, sucrose or starch as template, and characterized by scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS). The thickness of the Al₂O₃ shell in the catalyst was altered by controlling the synthesis condition, such as temperature and time. The catalytic performance of dimethyl ether (DME) synthesized from CO hydrogenation on the catalysts were investigated. The conversion of CO and the selectivity of DME on CuO-ZnO-Al₂O₃@Al₂O₃ achieved 35.2% and 61.1% at 260 ℃, 5.0 MPa and 1 500 mL/(h·g_cat), respectively.
- core-shell catalysts /
- syngas /
- dimethyl ether

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参考文献(18)

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