Catalytic oxidation of organic compounds in supercritical carbon dioxide /
This study presents a new technology which combines
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| Format: | Thesis Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=742145781&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | This study presents a new technology which combines supercritical extraction with on-line catalytic oxidation to remove organic pollutants from contaminated soil. Extensive research work has been done on supercritical extraction of organic pollutants from contaminated soil. Therefore, this study focuses on catalytic oxidation of organic compounds in supercritical carbon dioxide. Catalytic oxidation of toluene, tetralin, decane, ethanol, acetaldehyde, and 2butanone was studied in a half-inch fixed-bed reactor. Oxidation of toluene, tetralin, and decane was conducted over a 0.5% Pt/A'203catalyst at the operating temperatures ranging from 548 to 663 K and the pressures from 7.93 to 10.78 MPa. Catalytic oxidation of ethanol, acetaldehyde, and 2-butanone was carried over a 4.45% Pt/TiO2 catalyst at temperatures from 423 K to 573 K and at a pressure of 8.96 MPa. All oxidation reactions were run with a slightly excess oxygen. The experiments were performed at different operating temperature, pressure, space-time, feed concentration of organic compounds, and feed concentration of oxygen, and the reaction kinetics were determined. Reaction mechanisms were proposed to study the reaction kinetics for all of the organic compounds. The kinetic parameters such as the reaction order, the rate constant, and the activation energy were obtained by fitting the experimental data to the proposed kinetic model. The kinetic models were also used to predict the experimental data at different operating conditions. The results showed that the proposed models can predict the experimental data with high accuracy. |
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| Item Description: | Vita. "Major Subject: Chemical Engineering". |
| Physical Description: | xiv, 170 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references. |