Efficient recovery of hydrogen and sulfur resources over non-sulfide based LaFexAl12-xO19 hexaaluminate catalysts by H2S catalytic decomposition

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	Efficient recovery of hydrogen and sulfur resources over non-sulfide based LaFexAl12-xO19 hexaaluminate catalysts by H2S catalytic decomposition
	Jiang, Guoxia; Zhang, Xin; Zhang, Fenglian; Liu, Zizhong; Wang, Zhuo; Hao, Zhengping; Lin, Caihong
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2020-04
卷号	263 页码:1-11
关键词	Hydrogen resource Sulfur recover H2S Active phase Catalytic mechanism
ISSN号	0926-3373
英文摘要	Simultaneous recovery of hydrogen and sulfur resources from acidic gas hydrogen sulfide (H2S), whose content may reach 20-100 % after hydrodesulfurization in oil refineries, is increasingly attractive. Nowadays, the widespread utilization of H2S decomposition technology is mainly restricted by the low hydrogen and sulfur yield, i.e. 20 % at 800 degrees C. In this work, for the first time a novel non-sulfide based LaFexAl12-xO19 hexaaluminate catalysts was used for high (50 %) hydrogen yield at 800 degrees C. At the same time, the active phases and reaction mechanism were confirmed by various characterization techniques. The XRD, Raman, XPS, Mossbauer and XAFS results verified that the Fe species in the hexaaluminate structure, especially octahedral-coordinated Fe3+, served as the main active phases. The reaction routes/mechanism for H2S decomposition were also verified by density functional theory (DFT) method. H2S was firstly adsorbed on the active sites and then completed the decomposition by direct dehydrogenation mechanism. Briefly, current study has minimized the challenges for H2S decomposition at industrial scale. It is anticipated that our findings will offer potential application of H2S decomposing technology.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44868]
专题	生态环境研究中心_环境纳米材料实验室
推荐引用方式 GB/T 7714	Jiang, Guoxia,Zhang, Xin,Zhang, Fenglian,et al. Efficient recovery of hydrogen and sulfur resources over non-sulfide based LaFexAl12-xO19 hexaaluminate catalysts by H2S catalytic decomposition[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2020,263:1-11.
APA	Jiang, Guoxia.,Zhang, Xin.,Zhang, Fenglian.,Liu, Zizhong.,Wang, Zhuo.,...&Lin, Caihong.(2020).Efficient recovery of hydrogen and sulfur resources over non-sulfide based LaFexAl12-xO19 hexaaluminate catalysts by H2S catalytic decomposition.APPLIED CATALYSIS B-ENVIRONMENTAL,263,1-11.
MLA	Jiang, Guoxia,et al."Efficient recovery of hydrogen and sulfur resources over non-sulfide based LaFexAl12-xO19 hexaaluminate catalysts by H2S catalytic decomposition".APPLIED CATALYSIS B-ENVIRONMENTAL 263(2020):1-11.