Experimental Studies On The Removal Of Volatile Organic Compounds By Pulsed Corona Combined With Absorption

This paper investigated the removal of volatile compounds(VOCs) such as triethylamine (TEA) and formaldehyde by aqueous absorption combined with pulsed corona. The experiments were carried out by a wire-in-plate pulsed corona reactor and using aqueous solution as the absorbent. VOC was stripped from the solution after absorption, and then the stripped gas was fed into the pulsed corona reactor. The influences of operation parameters like pulse voltage, gas conposition and water vapor on the removal of pollutants were investigated. Experimental result showed that the decomposition of TEA increased with the increase of peak voltage of the power as well as the oxygen concentration in the sample gas. The removal of triethylamine was about 65% when the initial concentration of triethylamine is about 4.42×10⁴ mg/m³ with an opration condition of pulse frequency 50 Hz and peak voltage 15 kV. The removal of triethylamine was about 45% when the concentration of formaldehyde is about 11 mg/m³, pulse frequency 50 Hz and peak voltage 17.5 kV. The decomposition products were analyzed. It was found that the main products from the decompositions were CO,CO₂ and H₂O. Experimental result also shows that the removal of VOCs in the argon and nitrogen was alsome the same, but more power needed in the argon gas. When the oxygen volume fraction changed from 10% to 30%, the removal of VOCs increased about 30%.Experimental system of aqueous absorption combined with pulsed corona for triethylamine removal was also performed. It was found that the triethylamine contained in the gas steam was effectively removed. However, the operation parameters need to be further optimized for industrial application.