Removal of Isobutyl Acetate in Flowed Air Stream with DBD Plasmas

Removal of isobutyl acetate (IA) gas using dielectric barrier discharge (DBD) technology were reported. The experimental results showed that IA removal efficiency can reach 75.3% when applied voltage, initial IA concentration and gas flow rate were set at 9 kV, 1788 mg/m³ and 2.85 m³/h, respectively. IA removal efficiency increased with increasing applied voltage but decreased with ascending initial concentration and gas flow rate. Energy yield continued rising with initial concentration of IA gas, its maximal value was up to 32.9 g/(kW.h). In addition, practical industrial waste gas containing IA from pharmacy were treated with DBD technology. The test result indicated that IA removal efficiency exceeds 80% as IA waste gas of 2000 m³/h flowed through reaction region of DBD (flow-velocity of 5.4 m/s). Treatment cost of IA waste was only 0.012 RMB/m³ as calculated. At last, qualitative analysis on byproducts via Ion chromatograph (IC) and Gas chromatogram-mass spectrometry (GC-MS) was performed.