Methanol synthesis from CO2 hydrogenation over CuO-ZnO-ZrO2-MxOy catalysts (M=Cr,Mo and W) |
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| Affiliation: | 1. Key Lab of Applied Chemistry of Zhejiang, Department of Chemistry, Zhejiang University, Hangzhou 310028, China;2. College of Chemical and Material Engineering, Quzhou University, Quzhou 324000, China;1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, Shanxi, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. National Engineering Research Center for Coal-Based Synthesis, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, Shanxi, China;1. CAS Key Lab of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No.99 Haike Road, Zhangjiang Hi-Tech Park, Shanghai 201210, China;2. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;3. School of physical Science and Technology, ShanghaiTech University, Shanghai 201210, China |
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| Abstract: | Three CuO-ZnO-ZrO2-MxOy (CZZM, M = Cr, Mo and W) mixed oxides were prepared by a co-precipitation method and tested as catalysts for methanol synthesis from CO2 hydrogenation. The catalysts were characterized by XRD, N2 adsorption/desorption, XPS, reactive N2O adsorption, H2-TPR, and CO2-TPD techniques. The results indicated that the methanol selectivity and yield of the CuO-ZnO-ZrO2 catalyst noticeably increased by the additions of MoO3 and WO3, but slightly decreased by Cr2O3 doping. Combining with the characterization results, the difference in methanol yield over the three catalysts can be attributed to the differences in their BET specific surface areas (SBET) and adsorption capacities for CO2, while the methanol selectivity is closely correlated to the ratio of surface contents of Zn to Cu, as well as the fraction of strong basic sites in the total basic sites of the investigated catalysts. |
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| Keywords: | Oxide additive Methanol synthesis |
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