Single-pass transformation of syngas into ethanol with high selectivity by triple tandem catalysis

Jincan Kang, Shun He, Wei Zhou, Zheng Shen, Yangyang Li, Mingshu Chen, Qinghong Zhang () and Ye Wang ()
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Jincan Kang: Xiamen University
Shun He: Xiamen University
Wei Zhou: Xiamen University
Zheng Shen: Xiamen University
Yangyang Li: Xiamen University
Mingshu Chen: Xiamen University
Qinghong Zhang: Xiamen University
Ye Wang: Xiamen University

Nature Communications, 2020, vol. 11, issue 1, 1-11

Abstract: Abstract Synthesis of ethanol from non-petroleum carbon resources via syngas (a mixture of H2 and CO) is an important but challenging research target. The current conversion of syngas to ethanol suffers from low selectivity or multiple processes with high energy consumption. Here, we report a high-selective conversion of syngas into ethanol by a triple tandem catalysis. An efficient trifunctional tandem system composed of potassium-modified ZnO–ZrO2, modified zeolite mordenite and Pt–Sn/SiC working compatibly in syngas stream in one reactor can afford ethanol with a selectivity of 90%. We demonstrate that the K+–ZnO–ZrO2 catalyses syngas conversion to methanol and the mordenite with eight-membered ring channels functions for methanol carbonylation to acetic acid, which is then hydrogenated to ethanol over the Pt–Sn/SiC catalyst. The present work offers an effective methodology leading to high selective conversion by decoupling a single-catalyst-based complicated and uncontrollable reaction into well-controlled multi-steps in tandem in one reactor.

Date: 2020
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DOI: 10.1038/s41467-020-14672-8

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