Abstract Dry reforming of methane (DRM) is an attractive route to convert CH4 and CO2 into syngas (a mixture of CO and H2). In this work, the performance of microwave-assisted DRM at atmospheric pressure (in terms of CH4 and CO2 conversions, H2 and CO selectivities, H2 and CO yields, and H2 to CO ratio) is studied as functions of additive gas flow rate, microwave power, CO2 to CH4 inlet supply ratio, and reaction time. Two additive gases were used, i.e., nitrogen and argon. Microwave-assisted DRM experiments in both gases show identical trend of conversions, selectivities, yields, and product ratio. DRM performances in both additive gases atmosphere were stable for up to 8 h. Under the same operating conditions, using Ar as an additive gas, however, led to higher H2 and CO selectivities and yields and thus, higher H2 to CO ratio relative to using N2 as an additive gas. Maximum CH4 and CO2 conversions of 79.35% and 44.82%, H2 and CO selectivities of 50.12% and 58.42%, H2 and CO yields of 39.77% and 32.89%, and H2 to CO ratio of 0.86 were obtained at 700 W and N2, CO2, and CH4 flow rates of 1.5, 0.4, and 0.2 L min−1, respectively.

中文翻译：

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微波辅助等离子体DRM在低微波功率下氮气和氩气气氛中的性能对比研究

摘要 甲烷干法重整 (DRM) 是一种将 CH4 和 CO2 转化为合成气（CO 和 H2 的混合物）的有吸引力的途径。在这项工作中，研究了大气压下微波辅助 DRM 的性能（在 CH4 和 CO2 转化率、H2 和 CO 选择性、H2 和 CO 产率以及 H2 与 CO 比率方面）作为添加剂气体流量、微波的函数功率、CO2 与 CH4 入口供应比和反应时间。使用了两种添加气体，即氮气和氩气。两种气体中的微波辅助 DRM 实验显示出相同的转化率、选择性、产率和产品比率趋势。DRM 在两种添加气体气氛中的性能稳定长达 8 小时。然而，在相同的操作条件下，使用 Ar 作为添加剂气体会导致更高的 H2 和 CO 选择性和产率，因此，与使用 N2 作为添加气体相比，H2 与 CO 的比率更高。在 700 W 和 N2 条件下，CH4 和 CO2 的最大转化率为 79.35% 和 44.82%，H2 和 CO 的选择性分别为 50.12% 和 58.42%，H2 和 CO 的产率分别为 39.77% 和 32.89%，H2 与 CO 的比率为 0.86和 CH4 流速分别为 1.5、0.4 和 0.2 L min-1。