Abstract
The formation of synthesis gas from propane oxidation has been investigated on 1.0% Pt/CeO2 catalysts in a fixed-bed flow reactor over a temperature range of 200−800 °C at atmospheric pressure using ∼90% inert. Three kinds of ceria, with different surface areas, have been used as the catalytic support for this reaction. The catalysts were characterized using X-ray diffraction (XRD), temperature-programmed reduction (TPR), temperature-programmed oxidation (TPO), H2 chemisorption, and BET surface area. For the catalysts with the highest surface area, a large decrease in BET surface area has been observed after calcinations at high temperature. The oxidation of propane occurs with two sets of products. At low temperatures (T ≤ 500 °C), propane oxidizes exclusively into CO2 and H2O with little H2. Above 500 °C, O2 is completely consumed, and the selectivities of CO and H2 increase steadily with increase in temperature. In the region 500−700 °C, high-surface-area catalysts show higher activity and selectivity ...
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