石油化工2025，Vol.54Issue(2)：161-166,6.DOI:10.3969/j.issn.1000-8144.2025.02.002
CeO2暴露晶面不同的FeKCe复合氧化物的乙苯脱氢催化性能
Influence of different exposed facets of cerium oxide on catalytic performance of ethylbenzene dehydrogenation by FeKCe composite oxides
曾铁强 1查凯文 1张征湃 1王晨宇 1宋磊 1缪长喜1
作者信息
- 1. 中石化(上海)石油化工研究院有限公司,上海 201208
- 折叠
摘要
Abstract
CeO2 nanocubes with(100)facet preferentially exposed and CeO2 nanopolyhedra with(111)facet preferentially exposed were synthesized via a hydrothermal method.Subsequently,FeKCe catalysts were prepared through a wet granulation method by utilizing the CeO2 nanocubes and nanopolyhedra as the CeO2 sources.The crystal structure,morphology,and exposed facets were characterized by XRD,SEM,HADDF-STEM,Raman,XPS,and H2-TPR,and surface properties and reduction properties of the catalysts were investigated.The experimental results reveal that the crystal structures,surface properties,and average grain sizes of the two catalysts whose main exposed facets are CeO2(100)and CeO2(111),respectively,are highly similar.In comparison to that of the KxFeyOz-CeO2(111)catalyst,the corresponding reduction peak of the KxFeyOz-CeO2(100)catalyst is observed to shift towards lower temperatures,and the catalyst is easily reduced.In addition,it exhibits superior reactivity in the ethylbenzene dehydrogenation,with an increased ethylbenzene conversion of 1.8 percentage points and a concomitant reduction in styrene selectivity by 1.0 percentage point.关键词
乙苯/脱氢/苯乙烯/暴露晶面Key words
ethylbenzene/dehydrogenation/styrene/exposed facet分类
化学化工引用本文复制引用
曾铁强,查凯文,张征湃,王晨宇,宋磊,缪长喜..CeO2暴露晶面不同的FeKCe复合氧化物的乙苯脱氢催化性能[J].石油化工,2025,54(2):161-166,6.
