Dry reforming of CH ₄ process can convert greenhouse gases into high‐value‐added fuels and chemicals with its broad application prospects in environmental protection and renewable energy. Non‐thermal plasma is considered an effective alternative method because it can activate CH ₄ and CO ₂ under low temperature and atmospheric pressure. This paper is aimed to optimize the plasma‐assisted dry reforming of CH ₄ process in a unipolar microsecond pulsed coaxial dielectric barrier discharge by investigating the effects of reactor structures. The results show that the conversions of reactants and the yields of syngas were significantly affected by the reactor structures. Specifically, a multi‐stage or foil external electrode and negative polar discharge could promote CH ₄ and CO ₂ conversions, gas product yields, and energy conversion efficiencies. For different electrodes, the maximal conversions of CH ₄ and CO ₂ were 20.4% and 14.1%, with an energy conversion efficiency of 4.4% under our experimental conditions. Higher conversions, yields, and energy conversion efficiencies were obtained with lower power input when applying heat insulation measures. CH ₄ conversion was promoted to 27.9% with a moderate energy conversion efficiency of 3.8%, but the conversion of CO ₂ was only 12% when packing materials into the reactor. The results can provide specific guidance for designing plasma or plasma‐catalytic dry reforming reactor.

Sustainable plasma-driven N₂ oxidation for NO_x formation by a nanosecond pulsed spark discharge is proposed to approach the zero-carbon emissions target with new insights into free-radical-chain reactions by kinetics modeling and optical diagnosis.

In this paper, we discuss the results from the computational investigation of the effect of a metal grounded target, metal target at a floating potential and dielectric targets (conductive and non-conductive) on the plasma bullet propagation and reflection. We show that the intensity of the primary ionization wave (IW) is the highest for the metal target, while it is significantly lower for the non-conductive dielectric. For the conductive dielectric, the wave intensity is greater than that for the non-conductive dielectrics, but lower than for a metal target. After the primarily forward IW touches the target, the reflected waves are observed for all the targets under investigation. For a metal target the reflected IW changes its direction and transforms into the secondary forward wave. We did not observe secondary forward IWs for dielectric targets. For dielectric targets, the reflected waves gradually decayed without changing their direction. The ‘stopping’ path for the reflected wave is introduced and the increase/decrease of this path is discussed in dependence on the target properties.

Optimizing and perceiving a nanosecond repetitively pulsed DBD plasma-assisted CH ₄ activation technique under temperature-independent, catalyst-free conditions, combining experimental and numerical researches.

This work demonstrates alternative green ammonia processing using nitrogen and water based non-thermal plasma without pure hydrogen supply which results in an enormous amount of CO ₂ emission.

This article discusses the ‘power-to-X’ (P2X) concept, highlighting the integral role of non-thermal plasma (NTP) in P2X for the eco-friendly production of chemicals and valuable fuels. NTP with unique thermally non-equilibrium characteristics, enables exotic reactions to occur under ambient conditions. This review summarizes the plasma-based P2X systems, including plasma discharges, reactor configurations, catalytic or non-catalytic processes, and modeling techniques. Especially, the potential of NTP to directly convert stable molecules including CO₂, CH₄ and air/N₂ is critically examined. Additionally, we further present and discuss hybrid technologies that integrate NTP with photocatalysis, electrocatalysis, and biocatalysis, broadening its applications in P2X. It concludes by identifying key challenges, such as high energy consumption, and calls for the outlook in plasma catalysis and complex reaction systems to generate valuable products efficiently and sustainably, and achieve the industrial viability of the proposed plasma P2X strategy.