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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 132Oxidative Removal of Dibenzothiophene by H2O2 over...

Oxidative Removal of Dibenzothiophene by H₂O₂ over Activated Carbon-Supported Phosphotungstic Acid Catalysts

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Abstract:

Phosphotungstic acid (HPW) supported on activated carbon (AC) combined with hydrogen peroxide formed an oxidative desulfurizaiton (ODS) system to oxidize sulfur-containing compounds in diesel fuel. Dibenzothiophene (DBT) dissolved in n-octane was selected as a model feedstock for studying this new ODS system. The HPW/AC catalysts were characterized with XRD, FTIR and N2 adsorption-desorption measurements. HPW was highly dispersed on the surface of carbon support. It was found that the DBT adsorption capacity decreased from 42 mg S/g to 33.13 mg S/g as HPW loading amount increased from 0 to 15 wt.%. Oxidative removal of DBT in the model oil significantly increased with increasing HPW loadings on the support from 0 to 10 wt.%. 100 % DBT was removed by using the catalysts with HPW content higher than 10 wt. %. At 80 °C, oxidative removal of DBT reached 100 % after 40 min of reaction when O/S molar ratio ranged from 4 to 10.

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Advances in New Catalytic Materials

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Periodical:

Advanced Materials Research (Volume 132)

Pages:

126-132

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.132.126

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Online since:

August 2010

Authors:

Guo Xian Yu, Rui Xue Zhou, Ji Bing Li, Xiao Long Zhou, Cheng Lie Li, Li Fang Chen, Jin An Wang

Keywords:

Activated Carbon (AC), Dibenzothiophene (DBT), Hydrogen Peroxide, Oxidative Desulfurization, Phosphotungstic Acid

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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