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http://dx.doi.org/10.12925/jkocs.2007.24.3.11

Photocatalytic Degradation Mechanism of Methyl Mercaptan using $TiO_2$  

Lee, Byung-Dae (Division of Health, Uiduk University)
Lee, Jin-Shik (Division of Culinary Arts, Uiduk University)
Kim, Yeoung-Chan (Department of Cosmetic Science, Joongbu University)
Publication Information
Journal of the Korean Applied Science and Technology / v.24, no.3, 2007 , pp. 296-300 More about this Journal
Abstract
This paper presents applicability of photocatalytic decomposition of methyl mercaptan using $TiO_2$. A quartz reactor was used in order to elucidate reaction pathway in photocatalytic decomposition of methyl mercaptan. Experimental results showed that more than 99.9% of methyl mercaptan was decomposed within 30 minutes. It was found that the photocatalytic decomposition of methyl mercaptan followed pseudo first order and its reaction coefficient was $0.05min^{-1}$ During 30 minutes in the photocatalytic reaction, the concentration of methyl mercaptan, dimethyl disulfide, $SO_2$, $H_2SO_4$, COS, $H_2S$ were determined. These results showed that 64% of methyl mercaptan were compensated for the increase in sulfur after 30 minutes through the mineralization. The proposed main photocatalytic decomposition pathway of methyl mercaptan was methyl $mercaptan{\rightarrow}dimethyl$ $disulfide{\rightarrow}SO_2{\rightarrow}H_2SO_4$.
Keywords
dimethyl disulfide; decomposition pathway; methyl mercaptan; mineralization; photocatalytic; sulfur balance;
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