Abstract
Cu-based catalysts were created using a two-step co-precipitation method, which can produce methanol from synthesis gases (H2 and CO) that also contain CO2. 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 ZnAl2O4 ratios than the other catalysts, and the catalysts using these supports showed a similar trend to the ZnAl2O4 ratio. Cu–ZnO/mixture ZnO and ZnAl2O4 catalysts with more ZnAl2O4 (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-ZnAl2O4 (C30ZA) catalyst. Cu–ZnO/mixture ZnO and ZnAl2O4 using support with Zn/Al = 2 (C10Z/20ZA) achieved dispersion of Cu (44.2%) and a methanol yield (409.0 gMeOH/kgcat./h) at a reaction temperature of 250 °C, GHSV of 4,444 h−1, and 40 bar.
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Abbreviations
- Av:
-
Avogadro’s number
- D :
-
Dispersion
- D*:
-
True dispersion
- DI:
-
Deionized water
- FID:
-
Flame ionization detector
- MWCu :
-
Atomic weight of copper
- N Cu :
-
Number of surface copper atoms in the unit surface area
- S Cu :
-
Copper metal surface area per unit weight of the catalyst
- S p :
-
Carbon selectivity
- TCD:
-
Thermal conductivity detector
- wtCu%:
-
Copper content of the catalyst
- X i :
-
Carbon conversion
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The authors declare no conflict of interest. This study was supported and funded by the Korea Institute of Science and Technology (Project No. 2E32562). The data presented in this study are available on request from the corresponding authors.
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Song, Ht., Kim, H.D., Yang, Yj. et al. Modified Cu–ZnO Catalysts Supported on the Mixture of ZnO and Zn–Al Oxide for Methanol Production via Hydrogenation of CO and CO2 Gas Mixture. Korean J. Chem. Eng. 41, 1375–1389 (2024). https://doi.org/10.1007/s11814-024-00022-7
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DOI: https://doi.org/10.1007/s11814-024-00022-7