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Catalysis in Green Chemistry and Engineering

每年出版 4 

ISSN 打印: 2572-9896

ISSN 在线: 2572-990X

H-Index: 2

Indexed in

NOVEL SYNTHESIS OF RWGS CATALYSTS ZnO/Al2O3 AND CuO/ZnO/Al2O3 FOR IMPROVED METHANOL PRODUCTION VIA CAMERE PROCESS

卷 3, 册 1, 2020, pp. 57-65
DOI: 10.1615/CatalGreenChemEng.2020034930
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摘要

Reverse water-gas shift (RWGS) is crucial for improved methanol production from CO2 via the two-step CAMERE process. The performance of the CAMERE process is more encouraging if the RWGS catalyst has high thermal stability. In this work we synthesized two RWGS catalysts, ZnO/Al2O3 and CuO/ZnO/Al2O3, using hydrothermal and combustion techniques. Both catalysts were characterized by scanning electron microscopy and x-ray diffraction procedures, surface-area measurements, and trials in a fixed-bed flow reactor. The results were that the hydrothermal method resulted in highly crystalline and stable catalysts with distinct flowery structures of ZnO rods, whereas the combustion method yielded crystalline catalysts with different crystallite sizes, low stability and high porosity, and specific surface area. When features of the spent catalysts were studied, no significant morphological changes were seen in those derived by the hydrothermal method; contrarily, those made by combustion synthesis showed agglomeration and reduced porosity and surface area.

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