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OALib Journal期刊
ISSN: 2333-9721
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助剂促进的Rh-Fe/Al2O3催化剂上CO加氢制乙醇反应性能
DOI: 10.3724/SP.J.1088.2012.11215, PP. 1007-1013
Keywords: 铑,铁,氧化铝,负载型催化剂,一氧化碳,加氢,乙醇
Abstract:
？考察了Fe,Rh载量以及助剂对Rh-Fe/Al2O3催化剂上合成气制乙醇反应性能的影响.结果表明,随着Fe载量的增加,甲醇选择性持续上升伴随着甲烷选择性的持续下降,而乙醇选择性有最优值.助剂的添加或多或少促进了甲醇耦合、CO插入和解离的活性,或抑制了催化剂加氢能力,使得乙醇选择性有所上升,甲醇选择性有所下降,而烃类选择性变化不大.随着CO加氢反应的进行,Rh-Fe/Al2O3催化剂上烃类选择性逐渐下降,但甲醇的生成活性逐渐上升,而乙醇选择性和生成活性逐渐下降;然而,助剂的添加并未提高催化剂的稳定性.这可能是由于在反应过程中Fe物种逐渐被合成气还原使得乙醇生成活性位数量逐渐减少所致.
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