Selective catalytic oxidation of H2S over iron oxide supported on alumina-intercalated Laponite clay catalysts

Zhang, Xin, Dou, Guangyu, Wang, Zhuo, Li, Li, Wang, Yufei, Wang, Hailin and Hao, Zhengping (2013) Selective catalytic oxidation of H2S over iron oxide supported on alumina-intercalated Laponite clay catalysts. Journal of Hazardous Materials, 260 104-111. doi:10.1016/j.jhazmat.2013.05.008


Author Zhang, Xin
Dou, Guangyu
Wang, Zhuo
Li, Li
Wang, Yufei
Wang, Hailin
Hao, Zhengping
Title Selective catalytic oxidation of H2S over iron oxide supported on alumina-intercalated Laponite clay catalysts
Formatted title
Selective catalytic oxidation of H2S over iron oxide supported on alumina-intercalated Laponite clay catalysts
Journal name Journal of Hazardous Materials   Check publisher's open access policy
ISSN 0304-3894
1873-3336
Publication date 2013-09-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.jhazmat.2013.05.008
Open Access Status Not yet assessed
Volume 260
Start page 104
End page 111
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Subject 2305 Environmental Engineering
2304 Environmental Chemistry
2311 Waste Management and Disposal
2310 Pollution
2307 Health, Toxicology and Mutagenesis
Abstract A series of iron oxide supported on alumina-intercalated clay catalysts (named Fe/Al-Lap catalysts) with mesoporous structure and high specific surface area were prepared. The structural and chemical properties were studied by nitrogen sorption isotherms, X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (UV-vis DRS), X-ray photoelectron spectra (XPS), Fourier transform infrared spectroscopy (FTIR), H-2 temperature-programmed reduction (H-2-TPR) and NH3 temperature-programmed desorption (NH3-TPD) techniques. It was realized that iron oxide mainly existed in the form of isolated Fe3+ in an oxidic environment. Fe/Al-Lap catalysts showed high catalytic activities in the temperature range of 120-200 degrees C without the presence of excessive O-2. This can be attributed to the interaction between iron oxide and alumina, which improve the redox property of Fe3+ efficiently. In addition, the strong acidity of catalysts and good dispersion of iron oxide were also beneficial to oxidation reaction. Among them, 7% Fe/Al-Lap catalyst presented the best catalytic performance at 180 degrees C. Finally, the catalytic and deactivation mechanisms were explored. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
Formatted abstract
A series of iron oxide supported on alumina-intercalated clay catalysts (named Fe/Al-Lap catalysts) with mesoporous structure and high specific surface area were prepared. The structural and chemical properties were studied by nitrogen sorption isotherms, X-ray diffraction (XRD), UV–vis diffuse reflectance spectra (UV–vis DRS), X-ray photoelectron spectra (XPS), Fourier transform infrared spectroscopy (FTIR), H2 temperature-programmed reduction (H2-TPR) and NH3 temperature-programmed desorption (NH3-TPD) techniques. It was realized that iron oxide mainly existed in the form of isolated Fe3+ in an oxidic environment. Fe/Al-Lap catalysts showed high catalytic activities in the temperature range of 120–200 °C without the presence of excessive O2. This can be attributed to the interaction between iron oxide and alumina, which improve the redox property of Fe3+ efficiently. In addition, the strong acidity of catalysts and good dispersion of iron oxide were also beneficial to oxidation reaction. Among them, 7% Fe/Al-Lap catalyst presented the best catalytic performance at 180 °C. Finally, the catalytic and deactivation mechanisms were explored.
Keyword Alumina-intercalated clay
H2S selective oxidation
Sulfur yield
Sulfur selectivity
Catalyst deactivation
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 2012AA063101
2010CB732300
20725723
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 22 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 24 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sun, 20 Oct 2013, 10:04:06 EST by System User on behalf of Aust Institute for Bioengineering & Nanotechnology