Al_2O_3修饰Ni/TiO_2催化剂上甲烷干重整反应(英文)

Al_2O_3 Modifying Ni/TiO_2 Catalysts over CH_4 Dry Reforming

通过Al2O3修饰的Ni-TiO2-Al2O3干凝胶催化剂,该催化剂在973K条件下焙烧10h后比表面积为363m2/g。孔分布介于2.5～2.7nm之间。采用BET和X-射线衍射考察了Al2O3组份对Ni/TiO2催化剂的影响。结果表明,Al2O3的加入使催化剂颗粒度变小,镍的分散度提高,抑制了Ni/TiO2催化剂的积碳,从而明显的提高了Ni-TiO2-Al2O3催化剂上甲烷和二氧化碳重整反应的活性和稳定性。

Addition of aluminum to Ni/TiO2 improves the stability of the catalyst in CH4 dry reforming . The resulting Ni/TiO2 - Al2O3 xerogel, after calcinations at 973K for 10 h, had a BET surface area in excess of 363m^2/g, contained mesoprores in the range 2. 5 -2. 7nm. Nitrogen adsorption and X - ray diffraction were used to characterize the function of addition aluminum to Ni/YiO2 catalyst. The role of aluminum addition promotes the formation of large metallic Ni ensembles increase the dispersion of Ni, suppression of Ni/TiO2 - Al2 O3 catalyst deactivation and carbon deposition.