In this study, oxidative coupling of methane (OCM) was carried out to produce C₂ and C₃ hydrocarbons directly from methane in a plasma-catalyst hybrid system. Since catalyst only reaction requires high temperature above 700 °C, dielectric barrier discharge (DBD) plasma was applied as plasma source to lower the reaction temperature. Among various supports, only SiO₂ showed the higher yield than plasma only reaction when combined with DBD plasma, which led us to focus on the SiO₂-based catalyst. It was found that Ag/SiO₂ demonstrated the highest C₂₊ hydrocarbon yield of about 9.7% at 385 °C. In this process, oxygen was proved to play an essential role in the coupling of methane to C₂₊ hydrocarbons over Ag/SiO₂ catalyst. However, Ag/SiO₂ catalyst under plasma condition became deactivated with time-on-stream because of coking. It was demonstrated that plasma regeneration at 378 °C gave rise to the full recovery of activity while thermal regeneration did not due to the partial removal of coke and the sintering of Ag.

在这项研究中，进行了甲烷的氧化偶联（OCM），在等离子催化剂混合系统中直接从甲烷中生产C ₂和C ₃烃。由于仅催化剂反应需要700°C以上的高温，因此将电介质阻挡放电（DBD）等离子体用作等离子体源以降低反应温度。在各种载体中，当与DBD等离子体结合使用时，仅SiO ₂的产率比仅等离子体的反应高，这使我们专注于SiO ₂基催化剂。发现在385℃下，Ag / SiO ₂表现出最高的C ₂₊烃产率，约为9.7％。在此过程中，氧气被证明在甲烷与C的偶联中起着至关重要的作用。Ag / SiO ₂催化剂上有_2+个碳氢化合物。然而，由于焦化，等离子体条件下的Ag / SiO ₂催化剂随着运行时间而失活。结果表明，在378°C下的等离子体再生可完全恢复活性，而热再生并不是由于部分除去了焦炭和进行了Ag的烧结。