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Chemcial Industry and Engineering 2024, Vol. 41 Issue (5) :121-130    DOI: 10.13353/j.issn.1004.9533.20240130
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Enhancement of In2O3 catalytic performance for CO2 hydrogenation to methanol by regulating Ni doping
LI Pingping1, GUAN Linjie2,3, ZHANG Long2, DING Maofeng2, XU Danyun2,3, XIE Delong1
1. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China;
2. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
3. Zhejiang Institute of Tianjin University, Zhejiang, Shaoxing 312300, China

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Abstract The development of indium-based catalysts with high activity and stability for promoting carbon dioxide hydrogenation to methanol is indeed a significance area of research for advancing green and sustainable technologies. The introduction of Ni into indium oxide through the co-precipitation method has been shown to effectively modulate the structure and surface properties of the crystal, leading to enhanced catalytic performance. In results, it was found that at a Ni content of 2.5%, Ni primarily exists as highly dispersed Ni2+ within the crystal structure, which significantly increases the oxygen vacancy content on the surface of the material. While at a higher Ni content of 10.0%, Ni exists not only in the form of Ni2+, but also partly in the metallic form. Comparing the catalytic performance of indium oxide with different nickel content at 260 ℃, 3 MPa and space velocity of 8 000 mL·g-1·h-1, 2.5% Ni@In2O3 exhibits better catalytic performance, achieving CO2 conversion of 5.5% and methanol selectivity of 36.5%. This suggests that controlling the Ni content and its chemical state in indium oxide catalysts can optimize the oxygen vacancy on the surface of In2O3 and enhance the activity of catalyst.
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LI Pingping
GUAN Linjie
ZHANG Long
DING Maofeng
XU Danyun
XIE Delong
Keywordscarbon dioxide hydrogenation   In2O3   methanol   Ni-doped   oxygen vacancy     
Received 2024-04-20;
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LI Pingping, GUAN Linjie, ZHANG Long, DING Maofeng, XU Danyun, XIE Delong.Enhancement of In2O3 catalytic performance for CO2 hydrogenation to methanol by regulating Ni doping[J]  Chemcial Industry and Engineering, 2024,V41(5): 121-130
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