Conversion of carbon dioxide to carbon monoxide by pulse dielectric barrier discharge plasma

The conversion of carbon dioxide (CO₂) to carbon monoxide (CO) was investigated in a non-thermal plasma dielectric barrier discharge (DBD) reactor, and the effects of different process conditions on the CO₂ conversion were investigated. The results showed that the increase of input power could optimize the conversion of CO₂ to CO. The CO₂ conversion and CO yield were negatively correlated with the gas flow rate, but there was an optimum gas flow rate, that made the CO selectivity best. The carrier gas (N₂, Ar) was conducive to the conversion of CO₂, and the effect of N₂ as carrier gas was better than Ar. The conversion of CO₂ to CO was enhanced by addition of the catalyst (5A molecular sieve).