The catalytic steam reforming of biodiesel was examined over Ni-alumina and Ni-ceria-zirconia catalysts at atmospheric pressure. Effects of temperatures of biodiesel preheating/ vapourising (190-365 °C) and reforming (600-800 °C), molar steam to carbon ratio (S/C=2-3), , and residence time in the reformer, represented by the weight hourly space velocity ‘WHSV’ of around 3 were examined for 2h. Ni supported on calcium aluminate and on Ceria-zirconia supports achieved steady state hydrogen product stream within 90% of the equilibrium yields, although 4% and 1% of the carbon feed had deposited on the catalysts, respectively, during the combined conditions of start-up and steady state. Addition of dopants to ceria-zirconia supported catalyst decreased the performance of the catalyst. Increase in S/C ratio had the expected positive effects of higher H2 yield and lower carbon deposition.
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机译：在大气压下，在Ni-氧化铝和Ni-二氧化铈-氧化锆催化剂上检查了生物柴油的催化蒸汽重整。生物柴油预热/汽化温度（190-365°C）和重整温度（600-800°C），蒸汽与碳的摩尔比（S / C = 2-3）和在重整器中停留时间的影响，表示为3小时左右的重量时空速度“ WHSV”进行了2小时的检查。在铝酸钙和二氧化铈-氧化锆载体上负载的镍，在起始反应的联合条件下，分别有4％和1％的碳原料分别沉积在催化剂上，从而在稳态收率的90％之内实现了稳态氢产物流。和稳定的状态。在二氧化铈-氧化锆负载的催化剂中添加掺杂剂会降低催化剂的性能。 S / C比的增加具有较高的H2收率和较低的碳沉积预期的积极作用。
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