物理化学学报Issue(1)：157-163,7.DOI:10.3866/PKU.WHXB201311271
铜物种对Cu/Fe2O3水煤气变换反应催化剂性能的影响
Influence of Copper Species on Performance of Cu/Fe2O3 Catalysts for Water Gas Shift Reaction
摘要
Abstract
A series of Cu/Fe2O3 catalysts with different Cu loadings were prepared using a co-precipitation method, and the relationship between their structures and catalytic activities for the water gas shift (WGS) reaction was careful y examined. It was found that the as-prepared Cu/Fe2O3 catalysts exhibit excellent WGS performances, in particular, the one containing 20% (w) CuO (CF-20) shows the best catalytic activity, with CO conversion of 97.2% at 250 °C. Its catalytic stability is also outstanding during the temperature range of 250-400 ° C. X-ray diffraction (XRD), N2 physisorption, and H2 temperature program reduction (H2-TPR) techniques were used to characterize the crystal phases, textures, and reduction properties of the Cu/Fe2O3 catalysts. The results show that the generation of CuFe2O4, which has a spinel structure in stabilizing Cu microcrystals and is easier to be reduced at low temperature, resulting in enhancing their reduction properties and facilitating electrons transfer between Cu and Fe2O3, thus greatly improving the catalytic performance. Furthermore, (NH4)2CO3 solution treatment of the as-prepared catalysts was performed to study the effect of bulk CuO existed in the Cu/Fe2O3 catalysts. The result suggests that the bulk CuO is favor for H atom transfer between Cu and Fe2O3, thus promoting the reduction of CuFe2O4, final y improving the catalytic performance.关键词
水煤气变换/Cu/Fe2O3催化剂/铜负载量/CuFe2O4Key words
Water gas shift/Cu/Fe2O3 catalyst/Copper loading/CuFe2O4分类
化学化工引用本文复制引用
林性贻,马俊涛,陈崇启,詹瑛瑛,郑起..铜物种对Cu/Fe2O3水煤气变换反应催化剂性能的影响[J].物理化学学报,2014,(1):157-163,7.基金项目
The project was supported by the Education Department of Fujian Province Class A Science&Technology Program, China (JA08021).@@@@福建省教育厅A类科技项目(JA08021) （JA08021）
