溶液燃烧法制备Ni-Al2O3催化剂用于CO2-CH4重整研究

无机材料学报, 2016, 31(5): 485-491. doi: 10.15541/jim20150530

溶液燃烧法制备Ni-Al2O3催化剂用于CO2-CH4重整研究

莫文龙 ^1, , 马凤云 ^2, , 刘月娥 ^3, , 刘景梅 ^4, , 钟梅 ^5, , 艾沙·努拉洪 ^6,

基金项目: Xinjiang University Science and Technology Innovation Project for Doctoral Student(XJUBSCX-2013008) 国家高技术研究发展计划(863计划)(2015AA050502) 新疆大学博士研究生创新项目(XJUBSCX-2013008)National "863" Project of China(2015AA050502)

关键词： CO2-CH4重整 , Ni-Al2O3催化剂 , 合成气 , 溶液燃烧法

Preparation of Ni-Al2O3 Catalysts by Solution Combustion Method for CO2 Reforming of CH4

Keywords： CO2 reforming of CH4 , Ni-Al2O3 catalyst , syngas , solution combustion method

采用溶液燃烧法制备了Ni含量为2wt％、4wt％、6wt％、8wt％和10wt％系列催化剂,并对反应前后催化剂进行N2吸附-脱附、XRD、H2-TPR、TPH、Raman、TEM和TG-DTG等表征.与等体积浸渍法(以溶液燃烧法制备的Al2O3为载体)制备的催化剂相比,溶液燃烧法制备的催化剂具有较大的比表面积,孔径分布可分为2～4.5 nm和4.5～10 nm两段,属典型的多级孔结构;NiO高度分散在载体上,与载体具有较强的相互作用,这种相互作用有利于提高催化剂的稳定性.催化剂210h稳定性试验表明,溶液燃烧法制备的Ni含量为8wt％试样的CH4转化率维持在90％左右,失活速率仅为0.035％/h,优于浸渍法制备的相同Ni含量催化剂.

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