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添加氯离子对Ni/CeO2催化剂CO选择甲烷化反应催化性能的促进

Zhi-ming GAO,Qian-zi DAI,Hong-wei MA

Transactions of Beijing Institute of Technology（2016）

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Abstract
采用浸渍方法制备NiO(Clx)/CeO2系列样品,经还原后得到Ni(Clx)/CeO2催化剂,用于富氢气体中CO的选择甲烷化反应,考察Cl/Ce原子比(x)对CO选择甲烷化反应活性的影响.结果表明,添加氯离子能够显著抑制CO2甲烷化反应,因而可使富氢气体中CO浓度降至10-5以下并且CO甲烷化反应选择性不低于50％,满足质子交换膜燃料电池对燃料的要求.通过CO和CO2吸附实验、程序升温还原(TPR)测定以及物相组成和晶粒尺寸分析,揭示添加氯离子的作用.
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Key words
nickel,ceria,chlorine,CO selective methanation,hydrogen purification
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