While methane-powered vehicles produce fewer greenhouse gas emissions in comparison to conventional fuel vehicles, there is a significant amount of methane slip in their exhaust that needs to be treated. This study investigates non-thermal plasma (NTP) assisted catalytic methane oxidation as an alternative method for the low temperature methane slip abatement applicable to the exhaust of biogas methane-powered vehicles. It is concluded that high CH₄ conversion and CO₂ selectivity can be obtained using NTP-catalysis at low temperature with Pd/Al₂O₃ found to be the most promising candidate among all catalysts tested. In addition, it was found that CH₄ conversion efficiency was dependent on the feed gas components and gas hourly space velocity as well as how the activation energy is introduced. For example, a combination of plasma and external heat supply provides advantages in terms of CH₄ conversion along with lower plasma energy consumption. The presence of N₂ and O₂ in the feed gas during NTP-catalytic methane oxidation results in unfavourable NO_X formation which linearly increases with CH₄ conversion. These results conclude that the most suitable aftertreatment option involves the combination of an oxidation catalyst with plasma to target the hydrocarbon and CH₄ oxidation, followed by an ammonia-SCR system to convert the NO_X formed in plasma assisted zone.

虽然与传统燃料汽车相比，以甲烷为动力的汽车产生的温室气体排放量更少，但其尾气中仍有大量甲烷泄漏需要处理。本研究调查了非热等离子体 (NTP) 辅助催化甲烷氧化作为一种​​替代方法，用于减少适用于沼气甲烷动力汽车尾气的低温甲烷泄漏。得出的结论是，在低温下使用 NTP 催化可以获得高 CH ₄转化率和 CO _{2选择性，发现 Pd/Al 2} O ₃是所有测试催化剂中最有希望的候选者。此外，还发现 CH ₄转化效率取决于原料气组分和气时空速以及如何引入活化能。例如，等离子体和外部供热的组合在 CH ₄转化以及较低的等离子体能量消耗方面提供了优势。在 NTP 催化甲烷氧化过程中，原料气中存在 N ₂和 O ₂导致不利的 NO _X形成，随着 CH ₄转化率线性增加。这些结果得出的结论是，最合适的后处理选项包括将氧化催化剂与等离子体相结合以靶向碳氢化合物和 CH ₄氧化，然后使用氨-SCR 系统来转化 NO_X在等离子辅助区形成。