摘要
La2O2CO3 was prepared by calcination of La2 （CO3）3 in the air. Catalysts Ni-Fe/La2O2CO3 with different mole ratios of Ni to Fe, Ni/La2O2CO3 and Fe/La2O2CO3 were prepared by impregnation method. The catalytic properties were evaluated on steam reforming of ethanol （SRE） from 300 to 700 ℃ under atmospheric pressure and the samples were characterized by Brunauer-Emmett-Teller method （BET）, X-ray diffraction （XRD） and temperature programmed reduction （TPR）. The results showed that Ni-Fe bimetallic catalysts exhibited higher activities than single metallic catalysts, which was attributed to the co-existence of well dispersed Ni, Fe and LaFeyNi1-yO3. It was found that the catalyst Ni-Fe/La2O2CO3 containing 10 wt.% Ni and 3 wt.%-5 wt.% Fe showed the best performance, the conversion of ethanol was 100%, the selectivity of H2 was higher than 90%, and the selectivity of CO was lower than 1.5% at 400 ℃.
La2O2CO3 was prepared by calcination of La2 （CO3）3 in the air. Catalysts Ni-Fe/La2O2CO3 with different mole ratios of Ni to Fe, Ni/La2O2CO3 and Fe/La2O2CO3 were prepared by impregnation method. The catalytic properties were evaluated on steam reforming of ethanol （SRE） from 300 to 700 ℃ under atmospheric pressure and the samples were characterized by Brunauer-Emmett-Teller method （BET）, X-ray diffraction （XRD） and temperature programmed reduction （TPR）. The results showed that Ni-Fe bimetallic catalysts exhibited higher activities than single metallic catalysts, which was attributed to the co-existence of well dispersed Ni, Fe and LaFeyNi1-yO3. It was found that the catalyst Ni-Fe/La2O2CO3 containing 10 wt.% Ni and 3 wt.%-5 wt.% Fe showed the best performance, the conversion of ethanol was 100%, the selectivity of H2 was higher than 90%, and the selectivity of CO was lower than 1.5% at 400 ℃.
基金
Project supported by the National Natural Science Foundation of China (20863006)
the Natural Science Foundation of Jiangxi Province (0620042)
Department of Education of Jiangxi Province (GJJ09078)
