TY - JOUR
T1 - Selective CO2 Hydrogenation to Hydrocarbons on Cu-Promoted Fe-Based Catalysts
T2 - Dependence on Cu-Fe Interaction
AU - Liu, Junhui
AU - Zhang, Anfeng
AU - Jiang, Xiao
AU - Liu, Min
AU - Sun, Yanwei
AU - Song, Chunshan
AU - Guo, Xinwen
N1 - Funding Information:
This work was financially supported in part by the National Key Research and Development Program of China (2016YFB0600902-5).
Publisher Copyright:
Copyright © 2018 American Chemical Society.
PY - 2018/8/6
Y1 - 2018/8/6
N2 - Conversion of CO2 to sustainable chemical feedstocks and fuels by reacting with renewable hydrogen is considered to be a promising direction in energy research. The selectivity of desired products, such as C2-C4 = and C5+, is low over unpromoted iron-based catalysts for CO2 hydrogenation. Therefore, promoters are often used to tailor and optimize the product distribution. In this work, the effect of doping Cu into Fe-based supported catalysts on the catalytic performance for CO2 hydrogenation to hydrocarbons was studied with a particularly focus on the interaction between Fe and Cu. For this purpose, catalysts with different Fe and Cu distribution were prepared by various impregnation methods. It was found that the selectivity of C2-C4 = over Cu-promoted catalysts decreased, but a significant improvement was obtained for C5+. This promoting behavior is different from that of other promoters (e.g., K, Mn, Zn, etc.). The secondary conversion of produced olefins on Cu-promoted catalysts, which results from the improvement of olefins adsorption, on Cu-promoted catalysts leads to the decrease of C2-C4 = (hydrogenation) but the increase of C5+ (oligomerization). Characterization results demonstrate that the catalytic performance is evidently associated with the strength of the interaction between Fe and Cu in the supported catalysts.
AB - Conversion of CO2 to sustainable chemical feedstocks and fuels by reacting with renewable hydrogen is considered to be a promising direction in energy research. The selectivity of desired products, such as C2-C4 = and C5+, is low over unpromoted iron-based catalysts for CO2 hydrogenation. Therefore, promoters are often used to tailor and optimize the product distribution. In this work, the effect of doping Cu into Fe-based supported catalysts on the catalytic performance for CO2 hydrogenation to hydrocarbons was studied with a particularly focus on the interaction between Fe and Cu. For this purpose, catalysts with different Fe and Cu distribution were prepared by various impregnation methods. It was found that the selectivity of C2-C4 = over Cu-promoted catalysts decreased, but a significant improvement was obtained for C5+. This promoting behavior is different from that of other promoters (e.g., K, Mn, Zn, etc.). The secondary conversion of produced olefins on Cu-promoted catalysts, which results from the improvement of olefins adsorption, on Cu-promoted catalysts leads to the decrease of C2-C4 = (hydrogenation) but the increase of C5+ (oligomerization). Characterization results demonstrate that the catalytic performance is evidently associated with the strength of the interaction between Fe and Cu in the supported catalysts.
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U2 - 10.1021/acssuschemeng.8b01491
DO - 10.1021/acssuschemeng.8b01491
M3 - Article
AN - SCOPUS:85049299295
SN - 2168-0485
VL - 6
SP - 10182
EP - 10190
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
IS - 8
ER -
