Decomposition of high molecular weight carboxylic acid in aqueous solution by submerged thermal plasma

Experimental and thermodynamic comparison between a novel CO2/CH4 and an oxygen submerged DC thermal plasma for treatment of sebacic acid in basic aqueous solution

“…Formation of sebacic acid radicals also depends on the formation of hydroxyl radicals in solution as well as UV radiation during plasma processing Eqs. (8) and (9).…”

“…Air and nitrogen provide a relatively high decomposition rate of contaminants with a long electrode life. However, they produce additional pollutants due to the formation of NO x [8]. Argon, as an inert gas, can also be used in any treatment.…”

“…It is ionized easily compared to the other plasma gases, but its low thermal conductivity and low enthalpy reduces the thermal efficiency of the treatment process [1]. Oxygen can also offer a high decomposition rate of contaminants in basic medium [8]. Recently, carbon-containing molecular gases, such as CO 2 -based gas mixtures (CO 2 /CH 4 ), have been introduced as plasma gases for a newly designed DC thermal plasma torch [9].…”

Application of a Novel CO2 DC Thermal Plasma Torch Submerged in Aqueous Solution for Treatment of Dissolved Carboxylic Acid

“…It can be ionized easily compared to the other plasma gases, but its low thermal conductivity and low enthalpy reduce the thermal efficiency in the treatment process [1]. Oxygen can also offer high decomposition rate of contaminants due to a high level of oxidant species [7]. However, oxygen is corrosive to electrodes making it not adequate for the treatment process.…”

“…However, they produce additional pollutants due to the formation of mono nitrogen oxides, and NO x . Therefore, decomposition process with these plasmas requires a post treatment process to remove the nitrogen containing species [7]. Argon, which is an inert gas, can also be used as plasma gas in some DC thermal plasma torches.…”