钨电极辅助微波等离子体水蒸汽制氢的多物理场计算

通过电磁场和等离子体场耦合的方法对钨电极辅助微波等离子体制氢过程进行多物理场耦合计算, 并对制氢过程中的电子密度、电子温度、氢气和水蒸汽的浓度进行计算。计算结果表明,在10-16 s 到10-15 s 过程中, 电子密度和电子温度增加并由电极向四周扩散,氢气浓度缓慢增加。在10-15 s 到10-14 s 过程中,电子密度和电子温 度分别达到最大值5.45×1017个电子/ m3 和1.83×105 eV,氢气浓度增加了1.783×10-15 mol/ m3 远大于其它时间段。 在10-14 s 到10-13 s 过程中,电子密度和电子温度不增反降,氢气浓度增加也趋于平缓。由此表明,在10-15 s 到10-14 s 过程中,电子密度和电子温度达到最大时制氢速率也达到最大。

Multi-physical Field Coupling Calculation of Hydrogen Production from Microwave Plasma Water Vapor Assisted by Tungsten Electrode

In this paper, the coupling method of electromagnetic field and plasma field is used to calculate the multi -physical coupling of the tumgsten electrode assisted microwave plasma hydrogen production process, and the electron density, electron temperature, hydrogen and water vapor concentration during hydrogen production process are calculated. The results show that during 10-16 s to 10-15 s, the electron density and temperature increase and spread from electrode to electrode, and the hydrogen concentration increases slowly. In the process of 10-15 s to 10-14 s, the electron density and electron temperature reach the maximum value of 5. 45×1017 electrons/ m3 and 1. 83×105 eV respectively, and the hydrogen concentration increases by 1. 783×10-15 mol/ m3, far more than in other periods. In the process from 10-14 s to 10-13 s, the electron density and electron temperature do not increase but decrease, and the hydrogen concentration also tends to increase gently. This indicates that during the process of 10-15 s to 10-14 s, the hydrogen production rate also reaches the maximum when the electron density and electron temperature reach the maximum.