硫化氢热分解制氢过程的化学动力学研究

采用化学热平衡分析方法研究了硫化氢热分解制氢过程，研究了硫化氢在不同温度和体积分数下的分解过程，并与试验数据进行了比较。结果表明，基元反应机理能较好地模拟硫化氢热分解制氢过程。硫化氢的热分解率依赖于反应温度，高温下能获得较好的分解制氢效果；温度较低时，时间是硫化氢趋于平衡的主要影响因素，随着温度的提高，温度成为影响硫化氢趋于平衡的主要影响因素。硫化氢初始体积分数对热分解制氢反应具有较大的影响，采用较低体积分数的硫化氢混合气有利于获得高的硫化氢热分解制氢率。

Kinetics of thermal decomposition of hydrogen sulfide

The thermal decomposition of hydrogen sulfide to generate hydrogen is a novel control approach for hydrogen sulfide pollution. In this work, the kinetic of thermal decomposition of hydrogen sulfide was investigated. The decomposition efficiency of hydrogen sulfide under various temperature and residual time was studied by using thermodynamics analysis and experiments. The results show that the reacting mechanism proposed fits the thermal decomposition reaction of hydrogen sulfide well. The thermal decomposition of hydrogen sulfide greatly relies on the reacting temperature, and under higher temperature conditions the higher hydrogen generating efficiency can he achieved. When the temperature is low, the reaction time is the key factor to influence the thermal decomposition. The initial hydrogen sulfide concentration has a great influence on the thermal decomposition efficiency, and lower hydrogen sulfide concentration results in a higher thermal decomoosition efficiency.