DOI: 10.1016/j.jcou.2018.12.019
Scopus记录号: 2-s2.0-85059811893
论文题名: Plasma-assisted CO 2 conversion in a gliding arc discharge: Improving performance by optimizing the reactor design
作者: Li L. ; Zhang H. ; Li X. ; Kong X. ; Xu R. ; Tay K. ; Tu X.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2019
卷: 29 起始页码: 296
结束页码: 303
语种: 英语
英文关键词: CO 2 decomposition
; Flow rate
; Gas flow field
; Gliding arc discharge
; Reactor design
Scopus关键词: Carbon dioxide
; Dielectric materials
; Electric arcs
; Electric corona
; Electrodes
; Flow of gases
; Flow rate
; Gases
; Nozzles
; Corona discharges
; Dielectric barrier discharges
; Gliding arc
; Improving performance
; Nonthermal plasma
; Optimum conditions
; Reactor designs
; Space utilization
; Energy efficiency
英文摘要: In this paper, a gliding arc discharge (GAD) is investigated for CO 2 decomposition, with particular efforts directed toward improving the performance by optimizing the reactor design. The effects of various parameters, e.g., gas flow rate, configuration of the injector nozzle, and structure of the quartz cover, on the CO 2 conversion and energy efficiency are investigated. The results indicate that the variation profiles of CO 2 conversion upon rising flow rate can be clearly be divided into two patterns: Pattern A with outlet gas temperature > 440 °C and Pattern B with outlet gas temperature < 440 °C. The CO 2 conversion rises in Pattern A but decreases in Pattern B with the increase in flow rate. The relatively high temperature in Pattern A is negatively correlated with CO 2 conversion because it can stimulate the recombination of CO and O, which leads to the increase in CO 2 conversion with increasing flow rate (and decreasing gas temperature). A smaller injector nozzle diameter (1.0 mm) exhibits a better performance in terms of both CO 2 conversion and energy efficiency under most of the conditions studied, and a longer distance between the injector nozzle and electrodes is beneficial to the CO 2 conversion at relatively high flow rates (≥ 4 L/min). A quadrangular reactor cover was proved to have a better space utilization and a higher fraction of gas treatment by plasma, which can ensure a more adequate contact between the injected gas and plasma, and thus a better performance. The optimum conditions are: flow rate = 3 L/min, nozzle diameter = 1.0 mm, distance between injector nozzle and electrodes = 5.0 mm, and a quadrangular cover, under which CO 2 conversion and energy efficiency up to 11.1% and 20.7% can be achieved. Compared to other typical non-thermal plasmas, such as dielectric barrier discharge and corona discharge, GAD shows a significantly higher energy efficiency along with a flow rate that is an order of magnitude higher. © 2019 Journal of CO2 Utilization. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117306
Appears in Collections: 气候变化与战略
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Recommended Citation:
Li L.,Zhang H.,Li X.,et al. Plasma-assisted CO 2 conversion in a gliding arc discharge: Improving performance by optimizing the reactor design[J]. Journal of CO2 Utilization,2019-01-01,29