The Influence of Mn, Zr and Pb Promoters on the Performance of Cu/ZnO/SBA-15 Catalyst for Hydrogenation of CO₂ to Methanol

Abstract:

The present work investigates the hydrogenation of CO₂ to methanol via a promoted Cu/ZnO/SBA-15 catalyst. In order to understand the effect of Mn, Zr and Pb promoters on the catalytic activity of Cu/Zn/SBA-15 catalysts, the hydrogenation of CO₂ was performed in a stirred high-pressure reactor at 483K, 22.5bar, and a H₂/CO₂ ration of 3. The physicochemical properties of the catalysts were studied using N₂ physical adsorption, TEM and H₂-TPR. The characteristics of catalysts depended on the type of promoter and it influenced their catalytic performance. The Mn and Zr promoters resulted in a larger surface area of the catalyst and improved catalytic activity and methanol selectivity. However, an opposite effect was found for the Pb promoter. A 10% improvement on the CO₂ conversion and 20% on the methanol selectivity was achieved due to the double promotion effect of Mn and Zr on Cu/ZnO-SBA-15 catalyst.

• Periodical: Defect and Diffusion Forum (Volume 365)
• Pages: 178-182
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.365.178
• Online since: July 2015
• Authors: Sara Faiz Hanna Tasfy, Noor Asmawati Mohd Zabidi, Maizatul Shima Shaharun, Duvvuri Subbarao
• Keywords: CO₂ Hydrogenation, Methanol Synthesis, Promoter

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