摘要
从实验和理论两个方面介绍了CH_4/CO_2重整反应中可能影响高活性抗积碳的Ni-Co双金属催化剂的因素。在实验方面,催化剂的制备方法,催化剂中每一种金属的含量、煅烧温度、还原气氛以及反应条件等因素都可能影响催化剂的性能。在理论计算方面,介绍了四种Ni-Co催化剂模型,分别是只包括活性组分的均相模型和表面偏聚模型,以及包含有载体的Ni-Co/Mg O和Ni-Co/Al_2O_3模型。只包含活性组分的均相模型上CH_4解离以及C和O的反应都会造成积碳;表面偏聚模型上C和O的反应能够消除积碳。可见表面偏聚模型更适合作为CH_4/CO_2重整反应的催化剂模型。而在包含载体的模型上只研究了CO_2的吸附。通过对文献的总结,希望理论和实践相结合,为重整反应催化剂的制备提供指导。
The factors that may influence the performance of high activity and suppress carbon deposition of Ni-Co bimetallic catalyst in the reaction of CH_4/CO_2 reforming from the experimental and theoretical aspects are reviewed. In experimental aspects,some factors,for example,the preparation method of catalyst,the content of each metal in the catalyst,the calcination temperature,reducing atmosphere as well as the reaction conditions,that can affect the reaction are checked. The four kinds of Ni-Co catalyst models in the theoretical calculation were reported. They are homogeneous and surface segregation models,only involved active components,and Ni-Co/Mg O and Ni-Co/Al_2O_3 models involved supports. Compared to the homogeneous model,the surface segregation models can eliminate carbon deposition in the reforming reaction. However,only the adsorption of CO_2 was investigated on supported models. For making a summing up documents,and wish to find the way to provide guidance for the preparation of reforming catalyst for CH_4/CO_2 reforming.
出处
《应用化工》
CAS
CSCD
北大核心
2016年第5期944-948,共5页
Applied Chemical Industry
基金
国家自然科学基金(21506120)
山西大同大学博士启动基金项目(2012-B-07
QD201049)
关键词
重整
催化剂活性
煅烧温度
预处理
DFT计算
reform
catalyst activity
calcination temperature
pretreatment
DFT method
