低碳化学与化工2024，Vol.49Issue(4)：71-78,8.DOI:10.12434/j.issn.2097-2547.20230328
封装型Ni基催化剂对煤焦油模型化合物催化转化的性能研究
Study on conversion performance of encapsulated Ni-based catalysts for coal tar model compounds
摘要
Abstract
In order to increase the content of light fractions in coal pyrolysis tar and regulate tar cracking products in a targeted manner,Ni-based catalysts(x Ni@HZSM-5,x is Ni content,mass fraction)were prepared by in situ encapsulation,and their catalytic conversion effects on tar model compounds:fluoranthene and pyrene were investigated.The results show that the difference of the x Ni@HZSM-5 conversion rates of two model compounds under N2 atmosphere is relatively small.Under H2 atmosphere,2.0Ni@HZSM-5 has the maximum conversion rates of fluoranthene and pyrene,which are 51.91%and 46.21%,respectively.And 2.0Ni@HZSM-5 has higher stability than 2.0Ni/HZSM-5(Ni mass fraction is 2.0%)prepared by impregnation method.The catalysts were analyzed and characterized by characterization methods such as X-ray diffraction(XRD),transmission electron microscope(TEM)and N2 adsorption/desorption,etc.The results show that 2.0Ni@HZSM-5 has larger specific surface area and pore volume than 2.0Ni/HZSM-5,and Ni is located inside the molecular sieve pores,which has higher activity and stability.The reaction paths of fluoranthene and pyrene during catalytic conversion were deduced by analyzing the conversion products of model compounds under different atmospheres.关键词
封装型催化剂/HZSM-5分子筛/模型化合物/反应机理Key words
encapsulated catalysts/HZSM-5 molecular sieve/model compounds/reaction mechanism分类
化学化工引用本文复制引用
董子豪,王明义,李文林,贾鹏,吴华帅,王俊文..封装型Ni基催化剂对煤焦油模型化合物催化转化的性能研究[J].低碳化学与化工,2024,49(4):71-78,8.基金项目
山西省基础研究计划(202103021223087) （202103021223087）
省部共建煤炭高效利用与绿色化工国家重点实验室开放课题(2021-K67). （2021-K67）
