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http://dx.doi.org/10.5322/JES.2002.11.7.749

Effects of Noble Gas on the Sonolytic Decomposition  

임봉빈 (일본 오사카부립대학 공학연구과)
김선태 (대전대학교 환경공학과)
Publication Information
Journal of Environmental Science International / v.11, no.7, 2002 , pp. 749-755 More about this Journal
Abstract
The effects of noble gas (such as helium, neon, argon, krypton, and xenon) on the sonolytic decomposition of water and 2-methyl-2-propanol(t-butanol) with 200 KHz high power ultrasound were investigated. The physical properties of the noble gas have an effect on the formation rate of products $(H_2O_2,\;H_2,\;O_2)$ and the decomposition rate on the sonolytic decomposition of water. The pyrolysis products, such as methane, ethane, ethylene, and acetylene are formed during the sonolytic decomposition of t-butanol. From the estimation of the ratio $[C_2H_4+C_2H_2] / [C_2H_6]$, the cavitation temperature would be varied by the used noble gas. In all cases for the sonolytic decomposition of water, t-butanol, and diethyl phthalate, the decomposition rates were xenon > krypton > argon > neon > helium with a significant difference and were closely correlated with the formation rate of OH radical and high temperature inside the cavitation bubble under each noble gas.
Keywords
Sonolytic decomposition; Noble gas; OH radical; Pyrolysis;
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