Investigation of methane plasmalysis in a nanosecond pulsed plasma reactor

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-08-08 DOI:10.1016/j.cep.2025.110483

E. Delikonstantis , F. Cameli , N. Rivolta , P. Roquiny , H. Wiame , G.D. Stefanidis

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Abstract

Methane (CH₄) pyrolysis driven by electric energy in the form of plasma represents a powerful valorization strategy that could lead to reducing the emissions of a potent greenhouse gas. Nanosecond pulsed discharge (NPD) plasma is particularly effective in delivering high-energy and short pulses to the gas feedstock. Thereby, by controlling the specific energy input (SEI) to the pure CH₄ feed stream, conversion levels above 80% can be attained. Acetylene (C₂H₂) and hydrogen (H₂) are the main reaction products and are produced with individual selectivity above 70%. Hence, H₂ energy cost can be as low as 35 kWh/kg, which matches the thermodynamic limit of water electrolysis, and is close to high-temperature plasma set-ups. Besides, an energy conversion efficiency (ECE) of 57% is obtained by accounting for all the gas products, indicating effective transformation of discharge energy into chemical energy.

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纳秒脉冲等离子体反应器中甲烷等离子体分解的研究

由等离子体形式的电能驱动的甲烷（CH4）热解代表了一种强大的增值策略，可以减少一种强效温室气体的排放。纳秒脉冲放电（NPD）等离子体在向气体原料输送高能量和短脉冲方面特别有效。因此，通过控制纯CH4进料流的比能量输入（SEI），转化率可以达到80%以上。乙炔（C2H2）和氢气（H2）为主要反应产物，产物的个别选择性在70%以上。因此，H2能源成本可低至35 kWh/kg，符合水电解的热力学极限，接近高温等离子体装置。此外，将所有气体产物计算在内，能量转换效率（ECE）为57%，表明排放能有效转化为化学能。

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来源期刊

Chemical Engineering and Processing - Process Intensification 工程技术-工程：化工

CiteScore

7.80

自引率

9.30%

发文量

408

审稿时长

49 days

期刊介绍： Chemical Engineering and Processing: Process Intensification is intended for practicing researchers in industry and academia, working in the field of Process Engineering and related to the subject of Process Intensification.Articles published in the Journal demonstrate how novel discoveries, developments and theories in the field of Process Engineering and in particular Process Intensification may be used for analysis and design of innovative equipment and processing methods with substantially improved sustainability, efficiency and environmental performance.