Plasma catalytic removal of VOCs using cycled storage‐discharge (CSD) mode: Tandem effect of zeolite adsorbents and Au catalysts on complete oxidation of toluene

Abstract

High-silica zeolite adsorbents (ZAs) are employed for plasma catalytic removal of toluene with cycled storage-discharge mode in this work. At 5 min discharge time of the discharge stage in air plasma (20% O 2 in N 2 ), toluene conversion attains 100%, obtaining 22% CO and 26% CO 2 selectivities. After 20 min discharge time, the air plasma gives the selectivities to CO of ~30% and CO 2 of ~60%. For complete oxidation of toluene to CO 2 , ZA and Au catalysts are combined and a tandem effect of in-plasma ZA and postplasma Au catalysts is achieved, featuring nearly 100% CO 2 selectivity at 100% toluene conversion. Dependences of the tandem effect on Au loading and space velocity ratio of ZA to Au catalyst are investigated.

Experimental and numerical study on atmospheric‐pressure air dielectric barrier discharge via 50 Hz/5000 Hz dual‐frequency excitation

“…Atmospheric pressure air dielectric barrier discharges (DBDs) are widely utilised in generating the non-thermal plasma for various applications, including gas purification and conversion [1][2][3], active flow control [4][5][6], plasma medicine [7][8][9], and seed germination [10][11][12]. Due to the presence of a dielectric, the DBD reactor is powered by either the pulse [13] or alternative current (AC) power [14].…”