石油化工2018，Vol.47Issue(5)：415-419,5.DOI:10.3969/j.issn.1000-8144.2018.05.003
用于富氢气体中一氧化碳优先氧化的大孔结构-整体式CuO-CeO2/Al2O3催化剂的性能
Performance of macroporous monolithic CuO-CeO2/Al2O3catalysts for preferential oxidation of carbon monoxide in hydrogen-rich gas
摘要
Abstract
The performance of catalyst's preferential oxidation(PROX) of CO is studied based on the characterization for the macroporous monolithic CuO-CeO2/Al2O3catalysts by SEM,XRD and H2-TPR,which are prepared by impregnation method following the preparation of macroporous monolithic Al2O3support by calcination method based on a polystyrene template and by filling alumina sol. The characterization results show that CuO in the catalysts is highly dispersed mainly in the form of aggregates with particle sizes 200 nm uniformly distributed on the pore wall of the support;the catalysts can reduce the concentration of CO in the hydrogen-rich gas to less than 100×10-6at the temperature range of 140-160 ℃ and the GHSV of 21 000 h-1. This approach makes it possible to miniaturize reactors. In addition,the macroporous monolithic CuO-CeO2/Al2O3catalysts are featured by lower diffusional limitation due to their thin active component load and extended pores(more curved),and the selectivity of the catalysts is greater than that of crushed ones,which indicates that the catalysts are still featured by diffusion resistance and there is still room for improvement.关键词
富氢气体/CO优先氧化/整体式CuO-CeO2/Al2O3催化剂/小型化/扩散阻力Key words
hydrogen-rich gas/preferential oxidation of CO/monolithic CuO-CeO2/Al2O3 catalysts/miniaturization/diffusion limitation分类
化学化工引用本文复制引用
苗杰,魏灵朝,蒋元力..用于富氢气体中一氧化碳优先氧化的大孔结构-整体式CuO-CeO2/Al2O3催化剂的性能[J].石油化工,2018,47(5):415-419,5.基金项目
国家高技术研究发展计划项目(2006AA05Z115). （2006AA05Z115）
