A Novel Method for Producing Hydrogen from a Hydrocarbon Liquid Using Microwave In-liquid Plasma

The in-liquid plasma method is a technology in which plasma of several thousand degrees Kelvin is generated within bubbles in a liquid. The purpose of this study is to enhance the hydrogen production rate from waste oils by using in-liquid plasma. Two types of microwave in-liquid plasma apparatus are adopted for hydrogen production. One is a conventional MW （microwave） oven, the other is a microwave generator with a waveguide to apply the in-liquid plasma steam reforming method in n-dodecane. The produced gas is 58%-90% hydrogen in these methods. The hydrogen production rate is improved by stabilization of the bubble growth. The gas production rate by plasma feeding steam in n-dodecane is 1.4 times higher than that without feeding steam.

金属氢化物阴极放电过程中压力自稳定机制研究

本文描述了一项采用金属氢化物阴极进行气体放电的实验研究，研究了气体放电的压力自稳定(pressure auto-stabilization)效应因素。实验采用的阴极由经过氢饱和的和被氧化物改进的Zr-V合金元件制成，并使其在磁场中进行低压放电。实验研究了近阴极区的等离子体密度分布与电子温度的依赖关系，以及阴极温度模式与放电电流的依赖关系。阴极热平衡数据和氢等离子体的诊断结果表明，在放电的自稳定模式中，保证“电流-压力”反馈的主要因素是离子轰击。对所得结果进行分析表明：各种类型的低压气体放电都能观察到自稳定模式，特别是磁控管(magnetron)低气压放电和反射(Penning)低气压放电存在明显的自稳定模式。但是，存在自稳定模式的低压极限值，实质上取决于放电几何(discharge geometry)。本文得出的结论使建造真空等离子体功率装置成为可能，可以达到自动化程度更高和操作更加简单的目的，而且其产品比同类产品具有更高的气体效率。