International Journal of Hydrogen Energy ( IF 7.2 ) Pub Date : 2021-08-30 , DOI: 10.1016/j.ijhydene.2021.08.006 Qiuying Wang 1 , Jiaqi Wang 1 , Tonghui Zhu 1 , Xiaomei Zhu 1 , Bing Sun 1
Discharge plasma reforming of methane to produce hydrogen has been a hotspot in recent years. At present, there is no report on liquid-phase discharge for methane reforming. In this paper, directly coupled liquid-phase microwave discharge plasma (LPMDP) is used for the first time to realize liquid-phase methane wet reforming to produce hydrogen. When methane gas is injected into the water in the reactor, plasma is generated in the water by microwave discharge. The type and relative intensity of active radicals produced during discharge are detected by emission spectroscopy. Methane gas is introduced into the reactor through two electrode structures. When the microwave power was 900 W, the optimal methane conversion rate reached 94.3%, and the highest concentration of hydrogen reached 74.0%. In addition, through the optimization of the electrode structure, while improving the stability of the plasma system, the higher yield of hydrogen and energy efficiency of hydrogen production were obtained, and the highest energy efficiency of hydrogen production was approximately 0.92 mmol/kJ. This investigation provides a new method for hydrogen production by liquid-phase plasma methane wet reforming.
中文翻译:
液相微波等离子体驱动甲烷湿法重整制氢特性
甲烷放电等离子体重整制氢是近年来的热点。目前还没有甲烷重整液相排放的报道。本文首次采用直接耦合液相微波放电等离子体(LPMDP)实现液相甲烷湿法重整制氢。当将甲烷气体注入反应器中的水中时,通过微波放电在水中产生等离子体。通过发射光谱检测放电过程中产生的活性自由基的类型和相对强度。甲烷气体通过两个电极结构引入反应器。当微波功率为900 W时,最佳甲烷转化率达到94.3%,最高氢气浓度达到74.0%。此外,通过电极结构的优化,在提高等离子体系统稳定性的同时,获得了更高的产氢率和制氢能效,最高产氢能效约为0.92 mmol/kJ。该研究为液相等离子体甲烷湿法重整制氢提供了一种新方法。