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Received October 17, 2023
Accepted December 2, 2023
- Acknowledgements
- The authors gratefully acknowledge their coworkers for their valuable research.
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Modifi ed Cu–ZnO Catalysts Supported on the Mixture of ZnO and Zn–Al Oxide for Methanol Production via Hydrogenation of CO and CO 2 Gas Mixture
Abstract
Cu-based catalysts were created using a two-step co-precipitation method, which can produce methanol from synthesis gases
(H 2 and CO) that also contain CO 2 . The catalysts were manufactured by a two-step co-precipitation method and compared
with catalysts manufactured by a one-step co-precipitation method. The supports with Zn/Al = 1 (10ZA) and Zn/Al = 2
(20ZA) showed higher ZnAl 2 O 4 ratios than the other catalysts, and the catalysts using these supports showed a similar trend
to the ZnAl 2 O 4 ratio. Cu–ZnO/mixture ZnO and ZnAl 2 O 4 catalysts with more ZnAl 2 O 4 (C10Z/20ZA and C20Z/10ZA)
showed lower carbon and CO conversion losses and lower sintering of Cu (200) particles at the reaction temperatures (250,
300, and 350 °C) than the Cu–ZnO-ZnAl 2 O 4 (C30ZA) catalyst. Cu–ZnO/mixture ZnO and ZnAl 2 O 4 using support with Zn/
Al = 2 (C10Z/20ZA) achieved dispersion of Cu (44.2%) and a methanol yield (409.0 g MeOH /kg cat. /h) at a reaction temperature
of 250 °C, GHSV of 4,444 h −1 , and 40 bar.
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