Selective catalytic oxidation of hydrogen in the presence of hydrocarbons was studied in a fixed bed quartz reactor, over 3 wt%Au/TiO2 and 5 wt%Au/TiO2 catalysts. This reaction can be utilised in the production of light alkenes via catalytic dehydrogenation, providing in situ heat to the endothermic dehydrogenation reaction and simultaneously removing a fraction of the produced hydrogen. It is important to avoid the non-selective combustion of the hydrocarbons in the mixture. Both 3 wt%Au/TiO2 and 5 wt%Au/TiO2 are active for the combustion of hydrogen, but in a gas mixture with propane and oxygen the selectivity is dependent upon the feed ratio of hydrogen and oxygen. At 550 °C, with propane present, no carbon oxides are formed when the H2:O2 ratio is four, but at lower ratios some CO2 and some CO is formed.
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Dyrbeck, H., Hammer, N., Rønning, M. et al. Catalytic oxidation of hydrogen over Au/TiO2 catalysts. Top Catal 45, 21–24 (2007). https://doi.org/10.1007/s11244-007-0234-7
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DOI: https://doi.org/10.1007/s11244-007-0234-7