Role of CH, CH 3, and OH radicals in organic compound decomposition by water plasmas

Takayuki Watanabe; Narengerile; Hiroshi Nishioka

doi:10.1007/s11090-011-9329-9

Role of CH, CH ₃, and OH radicals in organic compound decomposition by water plasmas

Takayuki Watanabe, Narengerile, Hiroshi Nishioka

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Decomposition of acetone, methanol, ethanol, and glycerine by water plasmas at atmospheric pressure has been investigated using a direct current discharge. At torch powers of 910-1,050 W and organic compound concentrations of 1-10 mol%, the decomposition rate of methanol and glycerine was over 99%, while those of acetone and ethanol was 95.4-99%. The concentrations of H ₂ obtained were 60-80% in the effluent gas for any compounds by pyrolysis. Based on the experimental results, the decomposition mechanism of organic compounds in water plasmas was proposed and the roles of intermediate species such as CH, CH ₃, and OH have been investigated; CH radical generated from organic compounds decomposition was easily oxidized to form CO; incomplete oxidation of CH ₃ leads to C ₂H ₂ generation as well as soot formation; and negligible amount of soot observed from glycerine decomposition even at high concentration indicated that oxidation of CH×( ×:1-3) was enhanced by OH radical.

Original language	English
Pages (from-to)	123-140
Number of pages	18
Journal	Plasma Chemistry and Plasma Processing
Volume	32
Issue number	1
DOIs	https://doi.org/10.1007/s11090-011-9329-9
Publication status	Published - Feb 1 2012
Externally published	Yes

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)
Condensed Matter Physics
Surfaces, Coatings and Films

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10.1007/s11090-011-9329-9

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abstract = "Decomposition of acetone, methanol, ethanol, and glycerine by water plasmas at atmospheric pressure has been investigated using a direct current discharge. At torch powers of 910-1,050 W and organic compound concentrations of 1-10 mol%, the decomposition rate of methanol and glycerine was over 99%, while those of acetone and ethanol was 95.4-99%. The concentrations of H 2 obtained were 60-80% in the effluent gas for any compounds by pyrolysis. Based on the experimental results, the decomposition mechanism of organic compounds in water plasmas was proposed and the roles of intermediate species such as CH, CH 3, and OH have been investigated; CH radical generated from organic compounds decomposition was easily oxidized to form CO; incomplete oxidation of CH 3 leads to C 2H 2 generation as well as soot formation; and negligible amount of soot observed from glycerine decomposition even at high concentration indicated that oxidation of CH×( ×:1-3) was enhanced by OH radical.",

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T1 - Role of CH, CH 3, and OH radicals in organic compound decomposition by water plasmas

AU - Watanabe, Takayuki

AU - Narengerile,

AU - Nishioka, Hiroshi

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Y1 - 2012/2/1

N2 - Decomposition of acetone, methanol, ethanol, and glycerine by water plasmas at atmospheric pressure has been investigated using a direct current discharge. At torch powers of 910-1,050 W and organic compound concentrations of 1-10 mol%, the decomposition rate of methanol and glycerine was over 99%, while those of acetone and ethanol was 95.4-99%. The concentrations of H 2 obtained were 60-80% in the effluent gas for any compounds by pyrolysis. Based on the experimental results, the decomposition mechanism of organic compounds in water plasmas was proposed and the roles of intermediate species such as CH, CH 3, and OH have been investigated; CH radical generated from organic compounds decomposition was easily oxidized to form CO; incomplete oxidation of CH 3 leads to C 2H 2 generation as well as soot formation; and negligible amount of soot observed from glycerine decomposition even at high concentration indicated that oxidation of CH×( ×:1-3) was enhanced by OH radical.

AB - Decomposition of acetone, methanol, ethanol, and glycerine by water plasmas at atmospheric pressure has been investigated using a direct current discharge. At torch powers of 910-1,050 W and organic compound concentrations of 1-10 mol%, the decomposition rate of methanol and glycerine was over 99%, while those of acetone and ethanol was 95.4-99%. The concentrations of H 2 obtained were 60-80% in the effluent gas for any compounds by pyrolysis. Based on the experimental results, the decomposition mechanism of organic compounds in water plasmas was proposed and the roles of intermediate species such as CH, CH 3, and OH have been investigated; CH radical generated from organic compounds decomposition was easily oxidized to form CO; incomplete oxidation of CH 3 leads to C 2H 2 generation as well as soot formation; and negligible amount of soot observed from glycerine decomposition even at high concentration indicated that oxidation of CH×( ×:1-3) was enhanced by OH radical.

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Role of CH, CH ₃, and OH radicals in organic compound decomposition by water plasmas

Abstract

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