1. Enhanced Methanol Synthesis via CO2 Hydrogenation over ZnO/ZrO2 Catalysts by the Regulation of Precipitation Method.
- Author
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Shen, Yibing, Yu, Jun, Ji, Shuangtao, Hong, Fei, Guo, Qiangsheng, and Mao, Dongsen
- Subjects
PRECIPITATION (Chemistry) ,HYDROGENATION ,X-ray photoelectron spectroscopy ,CATALYSTS ,TRANSMISSION electron microscopy - Abstract
A series of ZnO/ZrO
2 catalysts were synthesized by the precipitation method. The effect of different precipitation modes on the physicochemical properties of the ZnO/ZrO2 catalysts for CO2 hydrogenation to methanol was investigated. The catalysts were characterized by X-ray diffraction (XRD), N2 adsorption–desorption, transmission electron microscopy (TEM), temperature programmed desorption of CO2 (CO2 -TPD), temperature programmed reduction of H2 (H2 -TPR), and X-ray photoelectron spectroscopy (XPS). The results showed that the catalyst of ZnO/ZrO2 prepared by the concurrent precipitation method had more CO2 adsorption sites, resulting in its higher CO2 conversion. While the stepwise precipitation mode increased the surface oxygen content of ZnO/ZrO2 , which enhanced the methanol selectivity. Overall, the ZnO/ZrO2 prepared by the concurrent precipitation mode exhibited a highly competitive efficacy for CO2 hydrogenation, giving a methanol selectivity of 81.4% with a CO2 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/ZrO2 catalysts for CO2 hydrogenation to methanol was investigated, and the ZnO/ZrO2 prepared by the concurrent precipitation mode exhibited a highly competitive efficacy for CO2 hydrogenation. [ABSTRACT FROM AUTHOR]- Published
- 2024
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