合成气与二甲醚为原料直接制乙醇催化反应研究进展

作为一种新型的煤制乙醇工艺，合成气经二甲醚羰基化合成乙酸甲酯，再进一步加氢制备无水乙醇的工艺路径备受市场关注。该工艺反应条件温和，所用分子筛和铜基催化剂价廉且制备方法简单。综述了二甲醚羰基化分子筛催化剂、乙酸甲酯加氢铜基催化剂的研究进展以及两者不同的耦合方式对合成气-二甲醚一步法制备乙醇反应路径的影响。重点介绍了分子筛催化二甲醚羰基化反应和失活机理以及分子筛催化剂设计调控的研究进展。该新型煤制乙醇技术为我国煤炭资源清洁高附加值利用提供了一条重要途径。

Advance in ethanol synthesis from syngas via carbonylation of dimethyl ether and hydrogenation of methyl acetate

As a new method for ethanol synthesis from coal, dimethyl ether carbonylation with CO to methyl acetate and its further hydrogenation to ethanol has attracted much industrial attention. This route requires mild reaction condition and the catalysts can be easily prepared. In this work, we reviewed the advancement of the catalyst in the field of dimethyl ether carbonylation and methyl acetate hydrogenation. In addition, we summarized the effect of proximity of zeolite and Cu-based catalyst for ethanol synthesis. We especially focused on the development of dimethyl ether carbonylation and deactivation mechanism over zeolite as well as the modification methods of zeolite. The new coal-to-ethanol technology provides an important way for the clean and high-value-added utilization of coal resources in China.