Carbon dioxide decomposition in a micro-slit sustained glow discharge reactor operated at low pressure of 8 Torr was studied experimentally. A specially designed reactor with a micro-slit configuration, combined with a third electrode that allows the extraction of electrons from the micro-slit discharge, was used to extend the glow discharge volume of the micro-slit discharge. It is found that, with the increase of the applied voltage of the third electrode, both the conversion fraction and energy efficiency of CO2 decomposition increase. The three-electrode structure was also extended to parallel operation to investigate the effects of applied voltage, flow rate, and number of parallel units on the conversion fraction and energy efficiency of CO2 decomposition. A maximum energy efficiency of 7.2% was achieved at a flow rate of 30 ml/min and power of 2.1 W for a single discharge unit, while for three discharges units connected in parallel, the maximum conversion fraction was 26.2% at a flow rate of 2 ml/min and power of 6.6 W. The results demonstrate the feasibility of parallel operation of the three-electrode micro-slit discharges, and increasing the number of parallel discharges increases both energy efficiency and conversion fraction at high flow rates. A better understanding of the physical and chemical kinetic processes will lead to optimization of future reactors to improve conversion and energy efficiency.

中文翻译：

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直流微缝持续辉光放电反应器中CO2分解的实验研究

实验研究了在 8 Torr 低压下运行的微缝持续辉光放电反应器中的二氧化碳分解。一个专门设计的具有微狭缝结构的反应器，结合第三个电极，允许从微狭缝放电中提取电子，用于扩展微狭缝放电的辉光放电体积。发现随着第三电极外加电压的增加，CO2分解的转化率和能量效率均增加。三电极结构还扩展到并联操作，以研究施加电压、流速和并联单元数量对 CO2 分解转化率和能量效率的影响。最高能效为 7。单个放电单元在 30 ml/min 的流速和 2.1 W 的功率下实现了 2%，而对于三个并联的放电单元，在 2 ml/min 的流速下最大转化率为 26.2%，并且6.6 W 的功率。结果证明了三电极微狭缝放电并行操作的可行性，增加并行放电的数量可以提高高流速下的能量效率和转换率。更好地了解物理和化学动力学过程将有助于优化未来的反应器，以提高转化率和能源效率。结果证明了三电极微狭缝放电并行操作的可行性，增加并行放电的数量可以提高高流速下的能量效率和转化率。更好地了解物理和化学动力学过程将有助于优化未来的反应器，以提高转化率和能源效率。结果证明了三电极微狭缝放电并行操作的可行性，增加并行放电的数量可以提高高流速下的能量效率和转化率。更好地了解物理和化学动力学过程将有助于优化未来的反应器，以提高转化率和能源效率。