TY - JOUR
T1 - N,N-dimethylformamide decomposition by DC water plasma at atmospheric pressure
AU - Duan, Chengyuan
AU - Tanaka, Manabu
AU - Watanabe, Takayuki
N1 - Publisher Copyright:
Copyright © 2021 The Society of Chemical Engineers, Japan.
PY - 2021/9/20
Y1 - 2021/9/20
N2 - The decomposition of a high concentration N,N-Dimethylformamide (DMF) solution by water thermal plasma was demonstrated. The result showed that DMF solutions of warying concentration (4,050-174,000 mg/L) was successfully decomposed. Decomposition rates of more than 94% was achieved, with the highest energy efficiency being 41.2 g/kWh. The temperature of the nozzle exit was measured to be 5,000-7,400 K, this extremely high temperature and O, H-radical-rich atmosphere inhibited the formation of byproducts like NOx. The major products of gas effluent are H2 (59-60%), CO (28-29%), CO2 (6-8%), and N2 (3-5%). The main form of nitrogen in the liquid effluent was nitrate nitrogen (NO3-N). Reaction pathways were proposed as follow: first, DMF dissociates into N, CH3, and CHO radicals in the arc region by electron impact; second, thermal decomposition and radical reactions with radicals like NHx and CHx occur in the plasma flame region; finally, recombination and oxidation occurs to form the products, such as N2, CO, and CO2 in the downstream region.
AB - The decomposition of a high concentration N,N-Dimethylformamide (DMF) solution by water thermal plasma was demonstrated. The result showed that DMF solutions of warying concentration (4,050-174,000 mg/L) was successfully decomposed. Decomposition rates of more than 94% was achieved, with the highest energy efficiency being 41.2 g/kWh. The temperature of the nozzle exit was measured to be 5,000-7,400 K, this extremely high temperature and O, H-radical-rich atmosphere inhibited the formation of byproducts like NOx. The major products of gas effluent are H2 (59-60%), CO (28-29%), CO2 (6-8%), and N2 (3-5%). The main form of nitrogen in the liquid effluent was nitrate nitrogen (NO3-N). Reaction pathways were proposed as follow: first, DMF dissociates into N, CH3, and CHO radicals in the arc region by electron impact; second, thermal decomposition and radical reactions with radicals like NHx and CHx occur in the plasma flame region; finally, recombination and oxidation occurs to form the products, such as N2, CO, and CO2 in the downstream region.
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U2 - 10.1252/jcej.21we019
DO - 10.1252/jcej.21we019
M3 - Article
AN - SCOPUS:85117944093
VL - 54
SP - 486
EP - 492
JO - Journal of Chemical Engineering of Japan
JF - Journal of Chemical Engineering of Japan
SN - 0021-9592
IS - 9
ER -