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Enhanced Methanol Synthesis via CO2 Hydrogenation over ZnO/ZrO2 Catalysts by the Regulation of Precipitation Method.
- Source :
- Catalysis Letters; Jul2024, Vol. 154 Issue 7, p3749-3758, 10p
- Publication Year :
- 2024
-
Abstract
- A series of ZnO/ZrO<subscript>2</subscript> catalysts were synthesized by the precipitation method. The effect of different precipitation modes on the physicochemical properties of the ZnO/ZrO<subscript>2</subscript> catalysts for CO<subscript>2</subscript> hydrogenation to methanol was investigated. The catalysts were characterized by X-ray diffraction (XRD), N<subscript>2</subscript> adsorption–desorption, transmission electron microscopy (TEM), temperature programmed desorption of CO<subscript>2</subscript> (CO<subscript>2</subscript>-TPD), temperature programmed reduction of H<subscript>2</subscript> (H<subscript>2</subscript>-TPR), and X-ray photoelectron spectroscopy (XPS). The results showed that the catalyst of ZnO/ZrO<subscript>2</subscript> prepared by the concurrent precipitation method had more CO<subscript>2</subscript> adsorption sites, resulting in its higher CO<subscript>2</subscript> conversion. While the stepwise precipitation mode increased the surface oxygen content of ZnO/ZrO<subscript>2</subscript>, which enhanced the methanol selectivity. Overall, the ZnO/ZrO<subscript>2</subscript> prepared by the concurrent precipitation mode exhibited a highly competitive efficacy for CO<subscript>2</subscript> hydrogenation, giving a methanol selectivity of 81.4% with a CO<subscript>2</subscript> conversion of 5.1% at 280 ℃ and 3 MPa, and the methanol yield reached 4.2%. The effect of different precipitation modes on the physicochemical properties of the ZnO/ZrO<subscript>2</subscript> catalysts for CO<subscript>2</subscript> hydrogenation to methanol was investigated, and the ZnO/ZrO<subscript>2</subscript> prepared by the concurrent precipitation mode exhibited a highly competitive efficacy for CO<subscript>2</subscript> hydrogenation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1011372X
- Volume :
- 154
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Catalysis Letters
- Publication Type :
- Academic Journal
- Accession number :
- 177817853
- Full Text :
- https://doi.org/10.1007/s10562-024-04610-4