气候变化领域集成服务门户(CCPortal): Temperature-independent; nonoxidative methane conversion in nanosecond repetitively pulsed DBD plasma

CCPortal

DOI	10.1039/d0se01593h
	Temperature-independent; nonoxidative methane conversion in nanosecond repetitively pulsed DBD plasma
	Chen X.; Zhang S.; Li S.; Zhang C.; Pan J.; Murphy A.B.; Shao T.
发表日期	2021
ISSN	23984902
起始页码	787
结束页码	800
卷号	5 期号:3
英文摘要	Currently, about 90% of methane (CH4) is used in various combustion processes, releasing carbon dioxide into the atmosphere. In order to optimize the use of fossil-fuel energy and reduce greenhouse gas emissions, finding effective ways to convert CH4into fuels and chemicals has become a research focus in academic circles and industry. Activating the strong C(sp3)-H bond (434 kJ mol−1) in CH4under mild conditions is one of the most rigorous challenges. The use of a plasma for dissociating CH4to CH3free radicals has advantages over conventional pyrolysis approaches. This work aims to increase the CH3production rate at low temperature by use of a nanosecond repetitively pulsed dielectric barrier discharge plasma with optimization of several parameters, including pulse rise time, pulse width and pulse repetition frequency. The maximum CH4conversion reaches 31.9% when the pulse repetition frequency is increased to 9 kHz, while the dominant C2hydrocarbon is always C2H6(from CH3coupling reaction). A chemical kinetic model confirms that H and CH3are the critical radicals produced from electron-impact CH4dissociation, with their peak densities of the order of 1015cm−3and 1014cm−3, respectively. The results indicate that the improved plasma technology can continuously produce abundant H and CH3radicals, which would enhance the surface reactions on the catalyst in the plasma-catalytic CH4conversion process. © The Royal Society of Chemistry 2021.
scopus关键词	Carbon dioxide; Carbon dioxide process; Dielectric devices; Dielectric materials; Electric discharges; Fossil fuels; Gas emissions; Greenhouse gases; Methane; Pulse repetition rate; Surface reactions; Temperature; Chemical kinetic model; Combustion pro-cess; Fossil fuel energy; Methane conversions; Plasma technology; Pulse repetition frequencies; Pulsed dielectric barrier discharges; Temperature independents; Ultrafast lasers; academic research; carbon dioxide; combustion; fossil fuel; greenhouse gas; low temperature; methane; optimization; plasma; radical; reduction
来源期刊	Sustainable Energy and Fuels
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177247
作者单位	Beijing International S&T Cooperation Base for Plasma Science and Energy Conversion, Institute of Electrical Engineering, Chinese Academy of Sciences100190, China; School of Physics and Electronics, Shandong Normal University, Jinan, 250014, China; University of Chinese Academy of Sciences, Beijing, 100049, China; CSIRO Manufacturing, Lindfield, NSW 2070, Australia; Dalian National Laboratory for Clean Energy, Dalian, 116023, China
推荐引用方式 GB/T 7714	Chen X.,Zhang S.,Li S.,et al. Temperature-independent; nonoxidative methane conversion in nanosecond repetitively pulsed DBD plasma[J],2021,5(3).
APA	Chen X..,Zhang S..,Li S..,Zhang C..,Pan J..,...&Shao T..(2021).Temperature-independent; nonoxidative methane conversion in nanosecond repetitively pulsed DBD plasma.Sustainable Energy and Fuels,5(3).
MLA	Chen X.,et al."Temperature-independent; nonoxidative methane conversion in nanosecond repetitively pulsed DBD plasma".Sustainable Energy and Fuels 5.3(2021).