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The effect of treatment of activated carbon by H2O2 or HNO3 on the decomposition of pentachlorobenzene

Paper ID Volume ID Publish Year Pages File Format Full-Text
48587 46514 2007 8 PDF Available
Title
The effect of treatment of activated carbon by H2O2 or HNO3 on the decomposition of pentachlorobenzene
Abstract

We investigated the reactivity between modified activated carbon and pentachlorobenzene (P5CBz) to better understand how the nature of activated carbon affects the decomposition of chlorinated aromatics. To modify and control the overall characteristics, activated carbon was treated with either nitric acid or hydrogen peroxide. According to ESR, the number of free radicals on the activated carbon was found to increase in response to a treatment in 70% nitric acid at 70 °C for 24 h. Additionally, certain functional groups, such as carboxyl and hydroxyl groups, are believed to have formed on the surface of the activated carbon as indicated by the results of FT-IR and XPS. The catalytic decomposition experiments involving P5CBz were conducted using a pulse-type, packed-bed reactor. Using the activated carbon that was previously treated with nitric acid for 24 h, P5CBz molecules were completely decomposed at a temperature of 350 °C, irrespective of either an air or nitrogen atmosphere. The mechanism of decomposition of P5CBz depends on the kind of oxygen functional group and free radicals present.

Keywords
Activated carbon; Chemical treatment; Pentachlorobenzene; Oxygen functional groups
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 74, Issues 3–4, 31 July 2007, Pages 179–186
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us