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H2S selective catalytic oxidation over Ce substituted La1-xCexFeO3 perovskite oxides catalyst
Zhang, Fenglian; Zhang, Xin; Jiang, Guoxia; Li, Na; Hao, Zhengping; Qu, Siqiu
2018-09-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume348Pages:831-839
AbstractA series of La1-xCexFeO3 perovskite catalysts were synthesized using a citrate sol-gel method and examined for H2S selective catalytic oxidation reaction. It was demonstrated that the catalysts exhibited prominent catalytic activity, outstanding sulfur selectivity (nearly 100%) and particularly low apparent activation energy. Remarkably, it can proceed consecutively for 70 h without notable deactivation. Moreover, Ce and Fe were mainly existed in the form of LaCeFeO3 perovskite-type oxides as well as Ce-Fe solid solution. Significantly, catalysts reducibility was improved greatly due to the strongly Ce-Fe synergetic effect. More importantly, a proper substitution of Ce can enhance surface basic properties and facilitate the formation of oxygen vacancies on the catalyst surface, and hence improve H2S adsorbability and lattice oxygen mobility, respectively. It co-operating with the improved reducibility jointly contributed to the excellent catalytic performance. Furthermore, the reaction obeyed a redox mechanism and the catalyst deactivation was due mainly to the formation of sulfate species. Additionally, the added water can lead to the establishment of the reverse Claus reaction, causing the decrease of catalytic performance.
Department环境纳米技术与健康效应重点实验室
KeywordPerovskite oxide Ce-Fe solid solution Synergetic effect Catalytic mechanism H2S selective oxidation
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/41091
Collection环境纳米技术与健康效应重点实验室
Recommended Citation
GB/T 7714
Zhang, Fenglian,Zhang, Xin,Jiang, Guoxia,et al. H2S selective catalytic oxidation over Ce substituted La1-xCexFeO3 perovskite oxides catalyst[J]. CHEMICAL ENGINEERING JOURNAL,2018,348:831-839.
APA Zhang, Fenglian,Zhang, Xin,Jiang, Guoxia,Li, Na,Hao, Zhengping,&Qu, Siqiu.(2018).H2S selective catalytic oxidation over Ce substituted La1-xCexFeO3 perovskite oxides catalyst.CHEMICAL ENGINEERING JOURNAL,348,831-839.
MLA Zhang, Fenglian,et al."H2S selective catalytic oxidation over Ce substituted La1-xCexFeO3 perovskite oxides catalyst".CHEMICAL ENGINEERING JOURNAL 348(2018):831-839.
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