NDLI: Ultrasound-assisted oxidation of dibenzothiophene with phosphotungstic acid supported on activated carbon.

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Ultrasound-assisted oxidation of dibenzothiophene with phosphotungstic acid supported on activated carbon.

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Ultrasound-assisted oxidation of dibenzothiophene with phosphotungstic acid supported on activated carbon.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Liu, Liyan Zhang, Yu Tan, Wei
Description	Country affiliation: China Author Affiliation: Liu L ( School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.); Zhang Y ( School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.); Tan W ( School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China. Electronic address: wtan@tju.edu.cn.)
Abstract	Phosphotungstic acid (HPW) supported on activated carbon (AC) was applied to catalyze deep oxidation desulfurization of fuel oil with the assist of ultrasound. The sulfur-conversion rate was evaluated by measuring the concentration of dibenzothiophene (DBT) in n-octane before and after the oxidation. Supporting HPW on AC has been verified to play a positive role in UAOD process by a series of contrast tests, where only HPW, AC or a mixture of free HPW and AC was used. The influences of catalyst dose, ultrasound power, reaction temperature, H2O2:oil volume ratio and the reuse of catalyst on the catalytic oxidation desulfurization kinetics were investigated. The DBT conversion rate of the reaction catalyzed by supported HPW under ultrasound irradiation was higher than the summation of the reactions with HPW only and AC only as catalyst. With the increase of loading amount of HPW on AC, ultrasound power, H2O2:oil volume ratio and reaction temperature, the catalytic oxidation reactivity of DBT would be enhanced. The optimum loading amount of HPW was 10%, exceed which DBT conversion would no longer increase obviously. DBT could be completely converted under the optimized conditions (volume ratio of H2O2 to model oil: 1:10, mass ratio of the supported HPW to model oil: 1.25%, temperature: 70°C) after 9 min of ultrasound irradiation.
File Format	HTM / HTML
ISSN	13504177
Issue Number	3
Journal	Ultrasonics Sonochemistry
Volume Number	21
e-ISSN	18732828
Language	English
Publisher	Elsevier
Publisher Date	2014-05-01
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Diagnostic Imaging
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Environmental Chemistry Acoustics and Ultrasonics Radiology, Nuclear Medicine and Imaging Chemical Engineering Inorganic Chemistry

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