摘要
采用共沉淀法制备了Au/Fe2O3催化剂,并用于富氢气体中CO的选择性氧化反应。研究结果表明,Au/Fe2O3催化剂对于富氢气体中CO的选择性氧化反应具有较高的低温活性和较高的选择性。40～80℃时对CO的转化率在94%以上,选择性在65%以上。在80℃时连续反应300h,催化剂表现出很好的稳定性。XRD、XPS和BET分析结果表明,催化剂的性能与单质Au的粒径有关,粒径越小,催化活性越高。
The CO selective oxidation over Au/Fe_2O_3 catalyst prepared by coprecipitation method in H_2-rich gas was studied. The catalyst had high activity and selectivity, and CO conversion of 94% and selectivity of 65% were obtained in the temperature range of 40-80℃. The sample showed good stability during 300h continuous test at 80℃. XRD, XPS and BET results indicated that the catalytic performance of Au/Fe_2O_3 was strongly dependent on the particle size of metallic gold. The smaller of gold particle size the better activity of Au/Fe_2O_3 catalyst was obtained.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2004年第5期14-16,共3页
Natural Gas Chemical Industry
