Abstract
The PtKCo/CeO2 catalyst obtained by impregnation of high-surface CeO2 (SBET=42.5m2/g) with the citrate complex of cobalt and doubly promoted with potassium and platinum was used in the steam reforming of ethanol (SRE - H2O/C2H5OH=9/1) and oxidative steam reforming of ethanol (OSRE - H2O/C2H5OH/O2=9/1/0.7) processes. Platinum promotion of KCo/CeO2 catalyst improves cobalt dispersion and reduction of cobalt oxides. However, despite physicochemical differences in the properties of KCo/CeO2 and PtKCo/CeO2 catalysts, their behaviour under the SRE and OSRE conditions remains very similar. Probably the addition of platinum (0.22%) is insufficient. The temperature of 540°C is sufficient to achieve complete conversion of ethanol and high selectivity towards hydrogen over the PtKCo/CeO2 catalyst. The presence of oxygen in the feed decreases the deactivation rate of the catalyst but also it decreases selectivity of ethanol conversion to hydrogen.
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