VOCs Decomposition via Modified Ferroelectric Packed Bed Dielectric Barrier Discharge Plasma

Abstract

A series of experiments are performed to remove toluene from a gaseous influent at room temperature and atmospheric pressure by nonthermal plasma (NTP) generated dielectric barrier discharge. Four packed bed plasma reactors are compared in terms of energy density, toluene removal, energy efficiency, and other factors, with four conditions: no packing materials, ceramic materials, BaTiO ₃ rings, and Ba _0.8 Sr _0.2 Zr _0.1 Ti _0.9 O ₃ rings. Ba _0.8 Sr _0.2 Zr _0.1 Ti _0.9 O ₃ as a special type of modified ferroelectric materials was manufactured by us in laboratory. The best removal efficiency of toluene arrives at 98% with Ba _0.8 Sr _0.2 Zr _0.1 Ti _0.9 O ₃ as the packing materials, and 16% higher than with BaTiO ₃ , in condition of toluene concentration of 600 mg/m ₃ , flow rate of 1 mL/min and reactor input energy density of 0.76 kJ/L. Ba _0.8 Sr _0.2 Zr _0.1 Ti _0.9 O ₃ shows better ferroelectric properties than BaTiO ₃ , as the packing materials of the modified ferroelectric in the NTP technology.