Electron-Beam Decomposition of Carbon Tetrachloride in Air/Nitrogen

Carbon tetrachloride (CCl4, approximately 10, 50, and 100 ppm) in air and nitrogen was irradiated with electron beams in both the presence and absence of water. The absorbed doses ranged from 1.2 to 18.0 kGys. An absorbed dose of 18 kGy led to approximately 90% decomposition of CCl4 at a concentrati...

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Bibliographic Details
Published in:Bulletin of the Chemical Society of Japan 2000-12, Vol.73 (12), p.2719-2724
Main Authors: Hirota, Koichi, Arai, Hidehiko, Hashimoto, Shoji
Format: Article
Language:English
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Summary:Carbon tetrachloride (CCl4, approximately 10, 50, and 100 ppm) in air and nitrogen was irradiated with electron beams in both the presence and absence of water. The absorbed doses ranged from 1.2 to 18.0 kGys. An absorbed dose of 18 kGy led to approximately 90% decomposition of CCl4 at a concentration of 10 ppm in dry air. The presence of water lowered the decomposition rate in air by 20%, but not in nitrogen. Negative oxygen ions (O2-) formed upon the irradiation of wet air played a role in the oxidation of CCl4. Water molecules became negative cluster ions (O2-(H2O)n) with negative oxygen ions, which depressed the oxidation.
ISSN:0009-2673
1348-0634
DOI:10.1246/bcsj.73.2719