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

Removal of VOCs(<2000mg/m~3) was experimentally investigated with a wire-in-tube pulsed corona reactor combined with alkaline solution absorption. A down flowing film of NaOH solution on the inner wall of reactor, the grounding electrode, was adopted. In the experiment, the influences of operation parameters like electrode material, pulse peak voltage, gas residence time, oxygen concentration and initial concentration of VOCs were investigated. Experimental results indicated that the removal of VOCs was different when different materials were employed as the wire electrode, and a kind of wolfram electrode showed the highest VOCs removal among used Cu, W and Ni-Cr wire electrodes. It was found that the removal of VOCs increases with the increase of the pulse peak voltage, gas residence time and oxygen concentration, but decreases with initial concentration. Three VOCs of styrene, TCE and methanal can be decomposed much easier, compared with other experimented pollutants, and the removal of those three compounds can be over 90%. The removal can be over 70% for aromatic hydrocarbons, and over 60% for acetone and methanol. It was found that the reactor combined with downstream film of...