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镍负载量对Ni/MgO(111)催化甲烷二氧化碳重整反应性能影响

李琳 ,  张露明 ,  张煜华 ,  李金林

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引用本文: 李琳, 张露明, 张煜华, 李金林. 镍负载量对Ni/MgO(111)催化甲烷二氧化碳重整反应性能影响[J]. 燃料化学学报, 2015, 43(3): 315-322. shu
Citation:  LI Lin, ZHANG Lu-ming, ZHANG Yu-hua, LI Jin-lin. Effect of Ni loadings on the catalytic properties of Ni/MgO(111) catalyst for the reforming of methane with carbon dioxide[J]. Journal of Fuel Chemistry and Technology, 2015, 43(3): 315-322. shu

镍负载量对Ni/MgO(111)催化甲烷二氧化碳重整反应性能影响

    通讯作者: 李琳,副教授,湖北洪湖人,Tel:027-67842752,Fax:027-67842752,E-mail:lilinchem@mail.scuec.edu.cn;李金林,教授,Tel:027-67842752,Fax:027-67842752,E-mail:jinlinli@aliyun.com。; 李琳,副教授,湖北洪湖人,Tel:027-67842752,Fax:027-67842752,E-mail:lilinchem@mail.scuec.edu.cn;李金林,教授,Tel:027-67842752,Fax:027-67842752,E-mail:jinlinli@aliyun.com。
  • 基金项目:

    国家自然科学基金青年基金(21403304)。 (21403304)

摘要: 研究了MgO(111)负载镍基催化剂催化甲烷二氧化碳重整反应性能,针对镍负载量对反应活性和稳定性的影响进行了探讨。结果表明,随着镍负载量从2%增加到10%,催化剂的活性和稳定性均有所提高,但是当镍负载量进一步增加到20%时,催化剂的活性和稳定性略有下降。利用透射电子显微镜、X射线衍射和H2吸附脱附等手段对催化剂结构进行了表征,利用热重分析、拉曼光谱和透射电镜等手段对反应后回收的催化剂进行了表征。研究发现,随着镍负载量的增大,活性金属镍的颗粒粒径呈现增长趋势,并且在反应过程中显示出不同的失活方式。2%Ni/MgO(111)催化剂的失活原因主要以Ni粒子的氧化为主,而负载量大于2%的Ni/MgO(111)催化剂的失活原因则是以积炭为主。

English

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  • 收稿日期:  2014-11-05
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