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Removal of dibenzothiophene from simulated petroleum by integrated γ-irradiation and Zr/alumina catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
49053 46543 2007 8 PDF Available
Title
Removal of dibenzothiophene from simulated petroleum by integrated γ-irradiation and Zr/alumina catalyst
Abstract

Catalysts that can enhance the radiolytic decomposition of dibenzothiophene (DBT) in the simulated petroleum were identified. Among the tested catalysts, zirconium oxide impregnated on alumina (Zr/Al2O3) showed the highest catalytic activity in the presence of γ-rays irradiation. The preparation condition of the catalyst was optimized. The main factors that affected the conversion efficiency of DBT were studied. The results showed that in the presence of Zr/Al2O3 catalyst when the applied radiation dose was 179 kGy, the removal efficiency of DBT was 98.9%, an increase of over 80% compared to that without catalyst. The removal efficiency was higher with the lower dose rate at the same irradiation dose. The effect of γ-rays irradiation upon the structure of the catalyst was investigated by XRD, XPS and SEM techniques. The catalyst appeared to be stable under the γ-rays irradiation except the surface coverage by the oxidized organic compound. In addition, the possible mechanism for the synergistic effect of γ-rays irradiation and catalyst was proposed.

Keywords
Dibenzothiophene; Petroleum; γ-Irradiation; Zr/Al2O3 catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 71, Issues 1–2, 8 February 2007, Pages 108–115
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us