CO₂ reforming of CH₄ in a non-thermal plasma process (e.g., dielectric barrier discharge, DBD) possesses dual benefits for our environment and energy needs. However, this process is strongly influenced by the dielectric structure of the DBD. Here, plasma CO₂ reforming of CH₄ has been performed in both single-dielectric and double-dielectric DBD (DBD-SD and DBD-DD) reactors under atmospheric pressure. Electrical and optical characterization, along with temperature measurements are performed to understand the influence of the DBD-SD and DBD-DD designs. Reactor performance for reforming is compared under different discharge powers. The results show that CO₂/CH₄ discharges in both DBD-SD and DBD-DD display typical filamentary microdischarges. Compared with the DBD-DD, the DBD-SD reactor exhibits a larger number and higher intensity of current pulses, which leads to a higher electron density and formation of reactive species. The highest conversion of CO₂ (24.1 %) and CH₄ (49.2 %) are achieved in the DBD-SD at a high discharge power (75 W). Moreover, higher selectivities of gaseous products are obtained in the DBD-DD, while the DBD-SD reactor shows a higher selectivity for liquid products, mainly including methanol and acetic acid. The highest energy efficiencies for reactant conversion (0.34 mmol/kJ), gaseous and liquid production formation (0.26 mmol/kJ and 0.015 mmol/kJ) are achieved in the DBD-SD reactor at a low discharge power (22 W), resulting from the low energy loss to the environment. However, the carbon deposited on the inner electrode surface in the DBD-SD would have an adverse influence on the reactor’s performance. Further research on the optimization of the DBD reactor to establish an efficient plasma-catalysis system is required for industrial applications.

在非热等离子体工艺（例如，介质阻挡放电，DBD）中对 CH ₄进行CO ₂重整对我们的环境和能源需求具有双重好处。然而，这个过程受到 DBD 介电结构的强烈影响。在这里，CH _{4 的}等离子体CO ₂重整已在大气压下在单介电和双介电DBD（DBD-SD 和DBD-DD）反应器中进行。执行电气和光学特性以及温度测量以了解 DBD-SD 和 DBD-DD 设计的影响。比较不同放电功率下的反应器重整性能。结果表明，CO ₂ /CH ₄DBD-SD 和 DBD-DD 中的放电都显示出典型的丝状微放电。与 DBD-DD 相比，DBD-SD 反应器表现出更多数量和更高强度的电流脉冲，这导致更高的电子密度和反应物种的形成。CO ₂ (24.1 %) 和 CH ₄的最高转化率(49.2 %) 在 DBD-SD 中以高放电功率 (75 W) 实现。此外，在 DBD-DD 中获得了更高的气体产物选择性，而 DBD-SD 反应器对液体产物显示出更高的选择性，主要包括甲醇和乙酸。DBD-SD 反应器在低放电功率 (22 W) 下实现了反应物转化 (0.34 mmol/kJ)、气体和液体产物形成 (0.26 mmol/kJ 和 0.015 mmol/kJ) 的最高能量效率，这是由于对环境的低能量损失。然而，沉积在 DBD-SD 内电极表面上的碳会对反应器的性能产生不利影响。工业应用需要进一步研究优化 DBD 反应器以建立高效的等离子体催化系统。