Sustainable route to hydrogen – Design of stable catalysts for the steam gasification of biomass related oxygenates
Sustainable route to hydrogen – Design of stable catalysts for the steam gasification of biomass related oxygenates
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DOI：
10.1016/j.apcatb.2008.09.018
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发表时间：
2009-04
影响因子：
22.1
通讯作者：
B. Güell;I. H. M. D. Silva;K. Seshan;L. Lefferts
中科院分区：
文献类型：
--
作者：
B. Güell;I. H. M. D. Silva;K. Seshan;L. Lefferts
研究了生物质衍生含氧物醋酸在镍基催化剂上的水蒸气重整反应。Ni/ZrO2在时间上呈现出逐渐失活的趋势。结焦和反应物的竞争吸附被认为是催化剂失活的原因。钾的加入对NiO的还原温度有很大影响。钾和镧的存在通过减少积炭改善了催化剂的稳定性。提出了La作为氧碳酸盐相的存在促进了焦炭气化。
Steam reforming of acetic acid, a biomass derived oxygenate, has been studied over Ni-based catalysts. Ni/ZrO2showed gradual deactivation in time. Coke formation as well as a competitive adsorption of reactants is suggested to be responsible for the catalyst deactivation. Addition of potassium strongly influenced the reduction temperature of NiO. The presence of potassium and lanthanum improved catalyst stability by decreasing coke accumulation. It is proposed that the presence of lanthanum as an oxy-carbonate phase enhances coke gasification.