The plasma dry reforming reaction of methane with carbon dioxide is investigated in a nanosecond repetitively pulsed discharge, a type of plasma that offers some of the highest performance and non-equilibrium characteristics. The experiment’s purpose was to examine the effect of varying the sequence of high-voltage pulses. We find that when successive pulses are closer than 500 μs, a memory-dominated regime gradually develops, which influences subsequent breakdown events. While reactant conversions increase with the plasma energy, both energy efficiency and conversions increase by shortening the inter-pulse time at the same plasma energy. This finding suggests that plasma power is not the only thing that matters to achieve better performance. How it is delivered can make a significant difference, in particular for CO₂, whose conversion doubles at the maximum energy for molecule investigated, 1.6 eV molecule^-1.

在纳秒级重复脉冲放电中研究了甲烷与二氧化碳的等离子干重整反应，这种脉冲放电提供了某些最高性能和非平衡特性。该实验的目的是检查改变高压脉冲序列的影响。我们发现，当连续脉冲小于500μs时，记忆为主的状态逐渐发展，这会影响随后的击穿事件。尽管反应物转化率随等离子能量增加，但通过缩短相同等离子能量下的脉冲间时间，能量效率和转化率都会提高。这一发现表明，等离子体功率并不是获得更好性能的唯一因素。交付方式可能会产生重大变化，尤其是对于CO _2而言，其转化率是所研究分子的最大能量1.6 eV分子^-1的两倍。