Modified Cuo/ZnO/Al₂O₃ Catalysts for Methanol Synthesis from Co and CO₂ Co-Hydrogenation

Abstract:

A series of CuO-ZnO-Al₂O₃ catalysts modified by different promoter were prepared by co-precipitation or incipient wet impregnation and characterized by X-ray diffraction (XRD), N₂ physisorption, hydrogen temperature-programmed reduction (H₂-TPR) and carbon dioxide temperature-programmed desorption (CO₂-TPD). The modified catalysts were tested for methanol synthesis from CO/CO₂ co-hydrogenation in a fixed bed reactor with feed containing CO, CO₂ and H₂(CO:CO₂:H₂=1.0:1.08:6.24, volume radio). It is revealed that the catalysts modified by Zr, Mg, Ca has higher activity of methanol synthesis by CO and CO₂ co-hydrogenation. Especially, the addition of Zr enhances the conversion of total carbon and the selectivity of methanol, which is due to the improved surface area, much more active sites, and the synergistically interaction between CuO and ZnO caused by the addition of Zr promoter.

• Periodical: Advanced Materials Research (Volumes 690-693)
• Pages: 1529-1534
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.690-693.1529
• Online since: May 2013
• Authors: Wen Gui Gao, Hua Wang, Wen Yan Liu, Feng Jie Zhang
• Keywords: Activity, CO Hydrogenation, CO₂ Co-Hydrogenation, Methanol, Promoter, Selectivity

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