Ethanol direct synthesis from dimethyl ether and syngas on the combination of noble metal impregnated zeolite with Cu/ZnO catalyst

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In this report, ethanol (EtOH) was selectively synthesized from dimethyl ether (DME) and syngas (CO+H2) with a dual-catalyst bed in a single reactor. H-Mordenite (H-MOR) zeolite was used to convert DME into methyl acetate (MA) through carbonylation reaction in the first stage reaction, and then EtOH was produced by MA hydrogenation over the Cu/ZnO catalyst at the second stage. In addition, the metals such as Pt, Pd or Ru were used to impregnate H-MOR catalyst by impregnation method to improve its catalytic activity. The combination of Pt/H-MOR catalyst with Pt loading amount of 0.4wt.% and Cu/ZnO catalyst showed excellent catalytic performance compared with the conventional combination of pure H-MOR catalyst and Cu/ZnO catalyst.