Plasmachemical Trace-Oxygen Removal in a Coke Oven Gas with a Coaxial Packed-Bed-DBD Reactor

The trace-O2 removal in coke oven gas, which enables better utilization of its contained H2, is investigated with combinations of atmospheric nonthermal plasma and a Pt/g-Al2O3 catalyst. Herein it is shown that a coaxial packed-bed dielectric barrier discharge (DBD) reactor removes up to 80-% O2 in a model coke oven gas. Along this line, the H2 content and the usage of Al2O3 granules in the plasma zone have been identified as major factors for the plasmachemical trace-O2 conversion. In contrast to the Pt/g-Al2O3 catalyst, nonthermal plasma converts trace O2 at coke oven gas temperatures below 100-°C.