Plasma‐driven CO2 hydrogenation to CH3OH over Fe2O3/γ‐Al2O3 catalyst

Author:

Meng Shengyan1,Wu Liang2,Liu Miao1,Cui Zhaolun3,Chen Qian1,Li Shangkun14,Yan Jiahui1,Wang Li5,Wang Xinkui1,Qian Ji1,Guo Hongchen1,Niu Jinhai2,Bogaerts Annemie4,Yi Yanhui1ORCID

Affiliation:

1. State Key Laboratory of Fine Chemicals, School of Chemical Engineering Dalian University of Technology Dalian China

2. Liaoning Key Lab of Optoelectronic Films and Materials, School of Physics and Materials Engineering Dalian Nationalities University Dalian China

3. School of Electric Power Engineering South China University of Technology Guangzhou China

4. Research group PLASMANT, Department of Chemistry University of Antwerp Antwerp Belgium

5. College of Environmental Sciences and Engineering Dalian Maritime University Dalian Liaoning China

Abstract

AbstractWe report a plasma‐assisted CO2 hydrogenation to CH3OH over Fe2O3/γ‐Al2O3 catalysts, achieving 12% CO2 conversion and 58% CH3OH selectivity at a temperature of nearly 80°C atm pressure. We investigated the effect of various supports and loadings of the Fe‐based catalysts, as well as optimized reaction conditions. We characterized catalysts by X‐ray powder diffraction (XRD), hydrogen temperature programmed reduction (H2‐TPR), CO2 and CO temperature programmed desorption (CO2/CO‐TPD), high‐resolution transmission electron microscopy (HRTEM), scanning transmission electron microscopy (STEM), x‐ray photoelectron spectroscopy (XPS), Mössbauer, and Fourier transform infrared (FTIR). The XPS results show that the enhanced CO2 conversion and CH3OH selectivity are attributed to the chemisorbed oxygen species on Fe2O3/γ‐Al2O3. Furthermore, the diffuse reflectance infrared Fourier transform spectroscopy (DRIFTs) and TPD results illustrate that the catalysts with stronger CO2 adsorption capacity exhibit a higher reaction performance. In situ DRIFTS gain insight into the specific reaction pathways in the CO2/H2 plasma. This study reveals the role of chemisorbed oxygen species as a key intermediate, and inspires to design highly efficient catalysts and expand the catalytic systems for CO2 hydrogenation to CH3OH.

Funder

Fundamental Research Funds for the Central Universities

National Natural Science Foundation of China

Publisher

Wiley

Subject

General Chemical Engineering,Environmental Engineering,Biotechnology

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