燃料化学学报Issue(11)：1387-1392,6.
Fe2 O3晶型对Fe基催化剂的CO2加氢性能影响
Influence of Fe2 O3 crystal phase on the performance of Fe-based catalysts for CO2 hydrogenation
摘要
Abstract
FeAl precursors ( remarked as P ) were prepared by co-precipitation method. Then they were impregnated with promoter Zn, K and Cu into ZnKCu/FeAl catalysts ( remarked as C ) . The precursors and catalysts were characterized by low temperature N2 adsorption, XRD and H2-TPR. CO2 hydrogenation over these catalysts was investigated in a fixed-bed reactor. With the addition of Al, the specific surface area of FeAl precursors and ZnKCu/FeAl catalysts was increased relative to that of Al-free samples. On the contrary, the crystallite size of a-Fe2 O3 was decreased by the added Al. The dispersed degree of Cu was raised in the catalysts containing Al. It is benefit for the reduction of ZnKCu/FeAl catalysts. However, the specific surface area and a-Fe2 O3 crystallite size of P-10 and C-10, in which the Al2 O3/Fe2 O3 mass ratio is 10 %, were similar to those of P-5 and C-5 with 5 % Al2 O3/ Fe2 O3 mass ratio, respectively. The phenomena were resulted from the strong g-Fe2 O3 phase in P-10 and C-10. It was evidenced that g-Fe2 O3 was formed only in the case of Fe and Al were co-precipitated, and the precipitate was washed by anhydrous ethanol in this study. The catalyst with strong g-Fe2 O3 phase was more active in CO2 hydrogenation than the catalysts with none or weak g-Fe2 O3 phase. This correlation was supported by the comparison between two catalysts with the same Al content, but different Fe2 O3 phases in them.关键词
Fe基催化剂/Al 含量/Fe2 O3晶型/CO2 加氢Key words
Fe-based catalyst/Al content/Fe2 O3 crystal phase/CO2 hydrogenation分类
化学化工引用本文复制引用
陈红贤,宁文生,陈春华,张甜..Fe2 O3晶型对Fe基催化剂的CO2加氢性能影响[J].燃料化学学报,2015,(11):1387-1392,6.基金项目
The project was supported by Zhejiang Provincial Natural Science Foundation of China (LY14B030003) and National Ministry of Science and Technology of China (2014BAD02B05).浙江省自然科学基金(LY14B030003)和国家科技支撑计划(2014BAD02B05)资助项目 （LY14B030003）
