Effects of particle size on CO2 reduction and discharge characteristics in a packed bed plasma reactor

被引:139
作者
Butterworth, T. [1 ]
Elder, R. [1 ]
Allen, R. [1 ]
机构
[1] Univ Sheffield, Dept Chem & Biol Engn, Sheffield S10 2TN, S Yorkshire, England
基金
英国工程与自然科学研究理事会;
关键词
Plasma; Packed bed reactor; Plasma catalysis; Particle size; CO2; reduction; Dielectric barrier discharge; NONTHERMAL PLASMA;
D O I
10.1016/j.cej.2016.02.047
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Current understanding of the behaviour of plasma discharges within packed bed reactors (PBRs) is very poor, and the effects of many of the parameters that can be varied are still unknown. This article investigates the effects of particle size (180 mu m-2000 mu m) of two different commonly used packing materials (Al2O3 and BaTiO3) on the conversion of CO2 in PBRs. The reactor behaviour is observed through determination of product gas composition and plasma power consumption in order to determine CO2 conversion and reactor efficiency. Electrical characterisation techniques are used to determine reactor burning voltage, and capacitances. These capacitances are subsequently used to quantify the occurrence of reactor partial discharging over a range of different operating conditions. The results indicate that smaller particles (down to 180 mu m) can significantly increase CO2 conversion by up to 70%, provided that the voltage applied is sufficiently high to generate a discharge in the void spaces of the packing material. However, with decreasing particle size, the reactor burning voltage is found to increase rapidly, as well as the tendency of the reactor towards partial discharging. (C) 2016 The Authors. Published by Elsevier B.V.
引用
收藏
页码:55 / 67
页数:13
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