氮化氧化铈负载镍基催化剂催化甲烷二氧化碳重整反应性能研究
Catalytic performance of nickel catalysts supported on N-CeO2 for carbon dioxide reforming of methane
投稿时间:2020-10-27  修订日期:2020-12-30
DOI:
中文关键词: 氮化  CeO2  甲烷干重整  二氧化碳  镍基催化剂
英文关键词: nitriding  CeO2  methane dry reforming  carbon dioxide  nickel based catalyst
基金项目:湖北省自然科学基金资助项目(2019CFB811)
作者单位E-mail
李 琳 中南民族大学 化学与材料科学学院 lilinchem@126.com 
王晓艳 中南民族大学 化学与材料科学学院  
申东阳 中南民族大学 化学与材料科学学院  
张煜华 中南民族大学 化学与材料科学学院  
李金林 中南民族大学 化学与材料科学学院  
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中文摘要:
      水热法合成的棒状CeO2载体(CeO2-R)经过高温NH3氮化,部分氧原子被氮原子所取代,得到氮化的棒状CeO2载体(N-CeO2-R)。采用满孔浸渍法浸渍活性金属Ni,通过XRD、TEM、XPS和H2-TPR等表征手段,研究载体及催化剂结构。结果表明:棒状CeO2载体在氮化前后,其形貌基本保持不变,同时载体中部分氧原子被氮原子取代,H2-TPR表明氮化后的载体与活性金属之间的相互作用力较强,不会阻碍载体表面与CO2相互接触,能够有效抑制催化剂因活性位点被覆盖而失活,进一步提高催化剂催化活性。
英文摘要:
      The rod-shaped CeO2 supports (CeO2-R) synthesized by hydrothermal method were nitrided by NH3 at high temperature, which were recorded as N-CeO2-R, and some oxygen atoms were replaced by nitrogen atoms. The active metal Ni was impregnated by equal volume impregnation method and the structure of supports and catalysts were characterized by XRD, TEM, XPS and H2-TPR. The results showed that the morphology of the catalysts still remained unchanged after nitriding treatment, and some oxygen atoms in the supports were replaced by nitrogen atoms. The results of H2-TPR showed that the interaction force between N-CeO2-R supports and nickel was stronger than that between CeO2-R supports and nickel, which would not hinder the contact between the support surface and CO2, and could effectively inhibit the deactivation of the catalyst due to the coverage of active sites, and further improved the catalytic activity of the nickel catalyst supported on N-CeO2-R.
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