A new method of ethanol synthesis from dimethyl ether and syngas in a sequential dual bed reactor with the modified zeolite and Cu/ZnO catalysts
A new method of ethanol synthesis from dimethyl ether and syngas in a sequential dual bed reactor with the modified zeolite and Cu/ZnO catalysts
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DOI：
10.1016/j.cattod.2010.10.027
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发表时间：
2011-04
期刊：
影响因子：
5.3
通讯作者：
Guohui Yang;Xiaoguang San;Nanzhe Jiang;Yuki Tanaka;Xingang Li;Quan Jin;K. Tao;Fanzhi Meng
中科院分区：
文献类型：
--
作者：
Guohui Yang;Xiaoguang San;Nanzhe Jiang;Yuki Tanaka;Xingang Li;Quan Jin;K. Tao;Fanzhi Meng
以Cu修饰h -摩登石（H-MOR）沸石催化剂和金属Cu/ZnO催化剂为催化剂，在双催化床反应器中以二甲醚（DME）和合成气（CO+H2）为原料直接合成乙醇。在上层沸石催化剂层上二甲醚羰基化生成乙酸甲酯（MA），然后在下层Cu/ZnO催化剂层上加氢生成乙醇并伴随甲醇。离子交换法制备的铜掺杂H-MOR催化剂在单二甲醚羰基化反应中表现出比纯H-MOR催化剂更好的催化活性，并对反应温度的影响进行了详细研究，确定了该铜掺杂H-MOR催化剂的最佳反应温度为493K。对于双催化剂床反应器中乙醇的合成，与纯H-MOR催化剂与Cu/ZnO催化剂的组合相比，铜掺杂H-MOR催化剂与Cu/ZnO催化剂的组合有效地提高了二甲醚的转化率，显著提高了最终产物中乙醇的选择性。
Ethanol was directly synthesized from dimethyl ether (DME) and syngas (CO+H2) with the combination of Cu-modified H-Modernite (H-MOR) zeolite catalyst and metallic Cu/ZnO catalysts in a dual-catalyst bed reactor. The methyl acetate (MA) was firstly formed by DME carbonylation on the upper zeolite catalyst layer, and then was subsequently hydrogenated on the lower Cu/ZnO catalyst layer to be converted into ethanol accompanying with methanol. A copper doped H-MOR catalyst prepared by ion-exchange method exhibited better catalytic activity compared with the pure H-MOR catalyst in the single DME carbonylation reaction, and the influence of reaction temperature was investigated in detail, confirming that the optimal reaction temperature for this copper doped H-MOR catalyst was 493K. For ethanol synthesis in the dual catalyst bed reactor, the combination of copper doped H-MOR catalyst with Cu/ZnO catalyst effectively improved the DME conversion, enhanced the ethanol selectivity in the final products remarkably, if compared with the combination of pure H-MOR catalyst with Cu/ZnO catalyst.