用于甲烷热解的等离子炉的可行性:制氢和制碳

IF 3 4区 工程技术 Q3 ENERGY & FUELS Energies Pub Date : 2023-12-28 DOI:10.3390/en17010167
Oday Daghagheleh, Johannes Schenk, M. Zarl, Markus Lehner, M. Farkas, Heng Zheng
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引用次数: 0

摘要

要实现工业的气候中和,就必须采用不含二氧化碳的替代品来生产 H2。最近的发展表明,等离子技术在这方面大有可为。本研究利用实验室规模的等离子炉研究甲烷热解生产 H2 的方法,主要目标是通过连续生产获得高 H2 产率。等离子炉采用直流传输热等离子弧系统。等离子气体由 Ar 和 CH4 组成,通过石墨空心阴极引入反应区。废气被导入以作进一步分析,而等离子弧则由安装在顶盖上的摄像头记录。结果显示,H2 产率高达 100%。较高的功率和较低的 CH4 输入有助于实现稳定的工艺,从而提高最终的 H2 产率。相反,增加气体流量会缩短气体停留时间,从而降低 H2 产率。等离子体电弧区的图像生动地描绘了碳的形成和生长,导致电弧中断,从而降低了效率。生产出的固体碳纯度高,结构蓬松细腻。本文认为,要实现高利用率的稳定连续运行,必须进一步优化和开发该工艺。
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Feasibility of a Plasma Furnace for Methane Pyrolysis: Hydrogen and Carbon Production
The imperative to achieve a climate-neutral industry necessitates CO2-free alternatives for H2 production. Recent developments suggest that plasma technology holds promise in this regard. This study investigates H2 production by methane pyrolysis using a lab-scale plasma furnace, with the primary objective of achieving a high H2 yield through continuous production. The plasma furnace features a DC-transferred thermal plasma arc system. The plasma gas comprises Ar and CH4, introduced into the reaction zone through the graphite hollow cathode. The off-gas is channeled for further analysis, while the plasma arc is recorded by a camera installed on the top lid. Results showcase a high H2 yield in the range of up to 100%. A stable process is facilitated by a higher power and lower CH4 input, contributing to a higher H2 yield in the end. Conversely, an increased gas flow results in a shorter gas residence time, reducing H2 yield. The images of the plasma arc zone vividly depict the formation and growth of carbon, leading to disruptive interruptions in the arc, hence declining efficiency. The produced solid carbon exhibits high purity with a fluffy and fine structure. This paper concludes that further optimization and development of the process are essential to achieve stable continuous operation with a high utilization degree.
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来源期刊
Energies
Energies ENERGY & FUELS-
CiteScore
6.20
自引率
21.90%
发文量
8045
审稿时长
1.9 months
期刊介绍: Energies (ISSN 1996-1073) is an open access journal of related scientific research, technology development and policy and management studies. It publishes reviews, regular research papers, and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.
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