Ni/CNTs及钙改性Ni/CNTs催化剂在二氧化碳甲烷化反应中性能 |
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引用本文: | 胡像锋,杨文,王宁,罗仕忠,储伟.Ni/CNTs及钙改性Ni/CNTs催化剂在二氧化碳甲烷化反应中性能[J].纳米科技,2014(1):17-23. |
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作者姓名: | 胡像锋 杨文 王宁 罗仕忠 储伟 |
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作者单位: | 四川大学化工学院,四川成都610065 |
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摘 要: | 分别以碳纳米管(CNTs)和活性氧化铝(Al2O3)为载体,通过浸渍法制备了负载型镍基催化剂和钙改性的镍基催化剂,用二氧化碳甲炕化反应评价其催化性能,通过X射线衍射(XRD)、程序升温还原(H2-TPR)、程序升温脱附(H2-TPD)和氮气等温吸附脱附等手段对催化剂进行表征,结果表明,Ni/CNTs催化剂中的镍物种比Ni/Al2O3中的镍物种容易还原,同时钙改性Ni/CNTs催化剂更能促进镍物种的还原,添加钙可以促进CNTs载体催化剂的分散度,这些特性能提高钙改性Ni/CNTs催化剂的催化活性和稳定性。
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关 键 词: | 甲烷化 碳纳米管 二氧化碳 镍催化剂 钙 |
Catalytic Properties of Ni/CNTs and Ca-Promoted Ni/CNTs for Methanation Reaction of Carbon Dioxide |
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Authors: | HU Xiang-feng YANG Wen WANG Ning LUO Shi-zhong CHU Wei |
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Affiliation: | (Department of Chemical Engineering, Sichuan University, Chengdu 610065, China) |
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Abstract: | Nickel/carbon nanotubes (Ni/CNTs) , Nickel/alumina (Ni/A1203) , calcium-promoted Ni/CNTs and calciumpromoted Ni/A1203 were synthesized by impregnation method. Methanation of carbon dioxide was used as a probe to evaluate their catalytic performance. The features of these Ni-based catalysts were investigated via XRD, HE-TPR, HE-TPD and the N2 adsorption-desorption isotherms. H2-TPR showed that nickel species on Ni/CNTs was reduced more easily with respect to that on Ni/Al2O3, and addition of Ca can increase the content of easily reducible Ni species for Ni/CNTs. XRD and H2-TPD indicated that addition of Ca promoted dispersion for CNTs-supported catalyst. These finding ultimately enhanced catalytic activity and stability for Ni/CNTs catalyst modified with Ca. |
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Keywords: | methanation CNTs carbon dioxide nickel catalyst calcium |
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