Plasma-Catalytic CO₂ Hydrogenation at Low Temperatures

Zeng, Yuxuan and Tu, Xin ORCID: 0000-0002-6376-0897 (2016) Plasma-Catalytic CO₂ Hydrogenation at Low Temperatures. IEEE TRANSACTIONS ON PLASMA SCIENCE, 44 (4). pp. 405-411.

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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 have been found dominant in the plasma CO2 hydrogenation process. The results show that the H2/CO2 molar ratio significantly affects the CO2 conversion and the yield of CO and CH4. The effect of different 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 without a catalyst, the combination of plasma with these catalysts enhances the conversion of CO2 by 6.7%-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 in the plasma process significantly increases the yield of CO by 114%, compared with the plasma reaction in the absence of a catalyst. In addition, we find that combining plasma with the Mn/γ-Al2O3 catalyst significantly enhances the energy efficiency of CO production by 116%, whereas packing the Cu/γ-Al2O3 catalyst into the DBD reactor only increases the energy efficiency of CO production by 52%.

Item Type:	Article
Uncontrolled Keywords:	CO2 hydrogenation, CO2 reduction, dielectric barrier discharge (DBD), plasma catalysis, reverse water-gas shift (RWGS) reaction
Depositing User:	Symplectic Admin
Date Deposited:	14 Jun 2016 10:30
Last Modified:	17 Oct 2023 03:21
DOI:	10.1109/TPS.2015.2504549
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3001657