PROJECT TITLE :

Plasma-Catalytic CO2 Hydrogenation at Low Temperatures

ABSTRACT:

A coaxial packed-bed dielectric barrier discharge (DBD) reactor has been developed for plasma-catalytic CO2 hydrogenation at low temperatures and atmospheric pressure. Reverse water-gas shift reaction and carbon dioxide methanation are found dominant within the plasma CO2 hydrogenation method. The results show that the H2/CO2 molar ratio considerably affects the CO2 conversion and therefore the yield of CO and CH4. The result of various γ-Al2O3 supported metal catalysts (Cu/γ-Al2O3, Mn/γ-Al2O3, and Cu-Mn/γ-Al2O3) on the performance of the CO2 hydrogenation has been investigated. Compared with the plasma CO2 hydrogenation while not a catalyst, the mixture of plasma with these catalysts enhances the conversion of CO2 by 6.sevenp.c-36%. The Mn/γ-Al2O3 catalyst shows the best catalytic activity for CO production, followed by the Cu-Mn/γ-Al2O3 and Cu/γ-Al2O3 catalysts. The presence of the Mn/γ-Al2O3 catalyst within the plasma process significantly will increase the yield of CO by 114%, compared with the plasma reaction within the absence of a catalyst. Additionally, we tend to realize that combining plasma with the Mn/γ-Al2O3 catalyst significantly enhances the energy potency of CO production by 116%, whereas packing the Cu/γ-Al2O3 catalyst into the DBD reactor only increases the energy potency of CO production by fifty twopercent.


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