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Angew Chem Int Ed Engl. 2019 Mar 26;58(14):4627-4631. doi: 10.1002/anie.201814611. Epub 2019 Feb 28.

Direct Production of Higher Oxygenates by Syngas Conversion over a Multifunctional Catalyst.

Lin T1, Qi X1, Wang X1,2, Xia L1, Wang C1,2, Yu F1,2, Wang H1, Li S1,3, Zhong L1,3, Sun Y1,2,3.

Author information

1
CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201203, China.
2
University of Chinese Academy of Sciences, Beijing, 100049, China.
3
School of Physical Science and Technology, ShanghaiTech University, Shanghai, 200031, China.

Abstract

Selective synthesis of higher oxygenates (linear α-alcohols and α-aldehydes, C 2 + OH) from syngas is highly attractive but remains challenging owing to the low C 2 + OH selectivity and low catalytic stability. Herein we introduce a multifunctional catalyst composed of CoMn and CuZnAlZr oxides that dramatically increased the oxygenates selectivity to 58.1 wt %, where more than 92.0 wt % of the produced oxygenates are C 2 + OH. Notably, the total selectivity to value-added chemicals including oxygenates and olefins reached 80.6 wt % at CO conversion of 29.0 % with high stability. The appropriate component proximity can effectively suppress the formation of the undesired C1 products, and the selectively propulsion of reaction network by synergetic effect of different components contributes to the enhanced selectivity to higher oxygenates. This work provides an alternative strategy for the rational design of new catalysts for direct conversion of syngas into higher oxygenates with co-production of olefins.

KEYWORDS:

cobalt carbide; higher oxygenates; olefins; synergetic effect; syngas conversion

PMID:
30710403
DOI:
10.1002/anie.201814611

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