Oxidation of propane over various supported platinum catalysts Ahlam Almoteiry, James Carter, Stuart Taylor, Graham Hutchings
Cardiff Catalysis Institute, Cardiff University, UK Corresponding author: AlmoteiryAM@cardiff.ac.uk
Pt/CeO2, Pt/ZrO2, Pt/SiO2 and Pt/TiO2 catalysts were employed to catalyse propane oxidation using two preparation methods strong electrostatic adsorption (SEA) and co-precipitation method (CO-P). The catalysts were tested under the same conditions at 450 °C with a molar ratio of 2:1 Propane: oxygen and a total flow rate of 20ml/min. The presence of Pt on the surface of catalysts (SEA) led to an increase in the activity and selectivity for ODH-O2 reaction rather than the bulk method (CO-P) . It was found that the Pt/CeO2 (SEA) catalyst was more active than the Pt/ZrO2 ,Pt/SiO2 and Pt/TiO2 (SEA) catalysts, while it was less selective in propane oxidation towards propene. The different behaviours of these catalysts may relate to the nature of the support, which affected the properties of the active Pt species at the surface of catalysts as well as the reaction mechanisms. Also, we found the reaction of ODH-O2 using Pt catalysts can lead to a combustion reaction (COX product +water) with dehydrogenation reaction (Propene)may be due to availability supply of oxygen which led to direct combustion of propane or propene and react with additional lattice oxygen or surface to produce COX product. References 1. Avila, M., Vignatti, C., Apesteguía, C., & Garetto, T., 2014. Effect of support on the deep oxidation of propane and propylene on Pt-based catalysts. Chemical Engineering Journal, 241, 52–59.
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© The Author(s), 2022
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