Effect of Silica Promoter on Performance of CuO-ZnO-ZrO₂ Catalyst for Methanol Synthesis from CO₂ Hydrogenation

Abstract:

Various CuO-ZnO-ZrO₂(CZZ) catalysts for methanol synthesis from CO₂ hydrogenation were prepared by co-precipitation method. Small amount of silica was incorporated into CZZ catalyst to produce these modified ternary CZZ catalysts. The effects of silica on physicochemical and catalytic properties were studied by TG-DTG,XRD,BET,N₂O chemisorption,H₂-TPR,NH₃-TPD and CO₂-TPD techniques. The results show that the properties of catalysts were strongly influenced by the content of SiO₂ used as promoter. The catalytic performance for methanol synthesis from CO₂ hydrogenation was evaluated. The test results show that the CZZ catalyst modified with 4 wt.% SiO₂ exhibits an optimum catalytic activity. The silica improves the dispersion of CuO and its modified CZZ catalysts exhibits higher specific surface area, which were confirmed to be responsible for excellent performance of the catalysts for methanol synthesis from CO₂ hydrogenation.

• Periodical: Applied Mechanics and Materials (Volumes 556-562)
• Pages: 117-122
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.556-562.117
• Online since: May 2014
• Authors: Miao Yao Jia, Wen Gui Gao*, Hua Wang, Yu Hao Wang
• Keywords: CO₂ Hydrogenation, CuO-ZnO-ZrO₂ Catalyst, Methanol Synthesis, Promoter, Silica

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