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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Electron-induced dry reforming of methane in a temperature-controlled dielectric barrier discharge reactor
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Electron-induced dry reforming of methane in a temperature-controlled dielectric barrier discharge reactor

机译：电子控制的甲烷在温度控制介电势垒放电反应器中的干重整

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Dry reforming of methane has the potential to reduce the greenhouse gases methane and carbon dioxide and to generate hydrogen-rich syngas. In reforming methane, plasma-assisted reforming processes may have advantages over catalytic processes because they are free from coking and their response time for mobile applications is quick. Although plasma-assisted reforming techniques have seen recent developments, systematic studies that clarify the roles that electron-induced chemistry and thermo-chemistry play are needed for a full understanding of the mechanisms of plasma-assisted reformation. Here, we developed a temperature-controlled coaxial dielectric barrier discharge (DBD) apparatus to investigate the relative importance of electron-induced chemistry and thermo-chemistry in dry reforming of methane. In the tested background temperature range 297-773 K, electron-induced chemistry, as characterized by the physical properties of micro-discharges, was found to govern the conversions of CH_4 and CO_2, while thermo-chemistry influenced the product selectivities because they were found to depend on the background temperature. Comparisons with results from arc-jet reformation indicated that thermo-chemistry is an efficient conversion method. Our findings may improve designs of plasma-assisted reformers by using relatively hotter plasma sources. However, detailed chemical kinetic studies are needed.
机译：甲烷的干重整具有减少温室气体甲烷和二氧化碳并产生富氢合成气的潜力。在甲烷的重整中，等离子体辅助的重整过程可能比催化过程更具优势，因为它们不结焦，并且对于移动应用的响应时间很快。尽管等离子辅助重整技术已经取得了新的进展，但需要系统的研究来阐明电子诱导化学和热化学的作用，以便全面了解等离子辅助重整的机理。在这里，我们开发了一种温度控制的同轴介质阻挡放电（DBD）设备，以研究电子诱导化学和热化学在甲烷干重整中的相对重要性。在测试的背景温度范围297-773 K中，发现了以微放电的物理性质为特征的电子诱导化学决定了CH_4和CO_2的转化，而热化学则影响了产物的选择性，因为它们被发现取决于背景温度。与电弧喷射重整的结果进行比较表明，热化学是一种有效的转化方法。我们的发现可以通过使用相对较热的等离子体源来改善等离子体辅助重整器的设计。但是，需要详细的化学动力学研究。

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