The mixture of CO and O2 obtained by splitting CO2 could be used as a valuable feedstock for the synthesis of industrially profitable chemicals if it could be accomplished economically. Dielectric barrier discharge (DBD) technology provides an attractive solution because the energetic electrons and active species in the plasma can stimulate chemical reactions even when the bulk gas is near room temperature. The splitting of CO2 into CO and O2 in a quartz cylindrical packed-bed dielectric barrier discharge reactor has been studied using CO2 and Ar gas mixtures at near ambient conditions (40-70°C) with γ-Al2O3, CeO2-ZrO2, and TiO2 packing. The conversion decreased both with increasing flow rate and increasing CO2 percentage in the flow. For a 20% CO2 in argon mixture, with a total flow rate of 35 sccm, using TiO2 packing at a power of 14.4W, a CO2 conversion of 28.6% was observed with corresponding measured yields of 26.1% CO and 12.8% O2.

CO2 splitting in a packed-bed dielectric barrier discharge reactor

249th National Meeting (2015)

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