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Spatially resolved reaction profiles of CO2 hydrogenation to methanol using in-based catalysts in a compact profile reactor
Citation Link: https://doi.org/10.15480/882.13096
Publikationstyp
Journal Article
Date Issued
2024-06-07
Sprache
English
TORE-DOI
Volume
12
Issue
25
Start Page
9541
End Page
9549
Citation
ACS Sustainable Chemistry & Engineering 12 (25): 9541-9549 (2024)
Publisher DOI
Scopus ID
Publisher
American Chemical Society
The compact profile reactor (CPR) design allows for the simultaneous acquisition of species, temperature, and spatially resolved reaction
profiles during high-pressure CO2 hydrogenation to methanol. Indium-based catalysts for CO2 hydrogenation have attracted significant scientific interest since they are more selective, efficient, and resistant to deactivation compared to the state-of-the-art copper-based catalyst. In this study, the reaction profile of In2O3/ZrO2 catalysts is compared to that of the state-of-the-art Cu/ZnO/Al2O3 (CZA) catalyst
in a high-pressure CPR. It is demonstrated that the addition of nickel as a promoter significantly enhanced the catalytic activity of pure
In2O3/ZrO2. The characterization by H2 TPR and CO2 TPD revealed an increased capacity for both hydrogen and CO2. A detailed comparison
and optimization of reaction conditions using Ni–In2O3/ZrO2 as a catalyst are presented. In an optimized experiment, Ni–In2O3/ZrO2 produces 4.90 gMeOH gIn+Ni–1 h–1 at 275 °C, 50 bar, and 63,000 h–1with a methanol selectivity of 73%. Furthermore, no catalyst deactivation caused by metal leaching or sintering could be observed over 90 h time on stream.
profiles during high-pressure CO2 hydrogenation to methanol. Indium-based catalysts for CO2 hydrogenation have attracted significant scientific interest since they are more selective, efficient, and resistant to deactivation compared to the state-of-the-art copper-based catalyst. In this study, the reaction profile of In2O3/ZrO2 catalysts is compared to that of the state-of-the-art Cu/ZnO/Al2O3 (CZA) catalyst
in a high-pressure CPR. It is demonstrated that the addition of nickel as a promoter significantly enhanced the catalytic activity of pure
In2O3/ZrO2. The characterization by H2 TPR and CO2 TPD revealed an increased capacity for both hydrogen and CO2. A detailed comparison
and optimization of reaction conditions using Ni–In2O3/ZrO2 as a catalyst are presented. In an optimized experiment, Ni–In2O3/ZrO2 produces 4.90 gMeOH gIn+Ni–1 h–1 at 275 °C, 50 bar, and 63,000 h–1with a methanol selectivity of 73%. Furthermore, no catalyst deactivation caused by metal leaching or sintering could be observed over 90 h time on stream.
Subjects
methanol synthesis
compact profile reactor
CO2 hydrogenation
indium oxide catalyst
Ni doping
hydrogen
spillover
spillover
DDC Class
660: Chemistry; Chemical Engineering
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