摘要
利用脉冲气相色谱保留体积法测定了不同铈含量的氧化铁对水蒸汽吸附的影响。实验结果表明，随着铈含量的增加，样品对水蒸汽的可逆吸附过程的吸附热降低，铈含量超过一定值后吸附热又略有升高。而铈含量对吸附中心数的多少影响不大。不同铈含量的氧化铁样品催化变换反应的活性测定结果表明，吸附热最小的样品的催化活性最高，说明铈在无铬铁系中温变换催化剂中起助催化剂的作用。
Abstract The adsorption property of iron oxide containing various amount of cerium oxide was studied. The adsorption heat of steam on the catalyst decreased and the amount of adsorbing centers did not change as the amount of cerium oxide in the samples was increased. The activities of the samples catalyzing the WGS reaction were measured. The results show that the lower adsorbtion heat a sample has, the higher activity it shows. It is proved that cerium oxide plays a role of catalyst accelerator in the WGS catalyst.
出处
《中国稀土学报》
CAS
CSCD
北大核心
1998年第2期131-133,共3页
Journal of the Chinese Society of Rare Earths
基金
河南省自然科学基金
