硫化氢高温裂解制氢的动力学研究

Kinetics Study of Hydrogen Preparation from a Pyrolysis of Hydrogen Sulfide

为了探究硫化氢高温裂解制取氢气机理,对其建立动力学模型,并将动力学模拟结果和试验数据以及热力学计算结果进行了比较,所建立的动力学模型能够较好地模拟硫化氢的高温裂解制氢过程,与试验数据以及热力学计算结果比较吻合。结果表明,随着裂解温度的提高,硫化氢的转化率和氢气的生成率显著提高,在1250℃时,分别可达56.8%和10.6%。当温度较低于1050℃时,随着停留时间的变长,硫化氢的转化率和氢气的生成率显著提高;当温度高于1050℃时,停留时间超过0.2s后,其对硫化氢的转化率和氢气的生成率影响很小。

To investigate the mechanism governing hydrogen preparation from a pyrolysis of hydrogen sulfide,a kinetic model has been established,and kinetic simulation results and test data have been compared with the thermodynamic calculation results.The kinetic model thus established can simulate comparatively well the hydrogen preparation process from the pyrolysis of hydrogen sulfide.The calculated results are in comparatively good agreement with the test data and the thermodynamic calculation results.The results of the study show that with the rise of cracking temperature,the conversion rate of hydrogen sulfide and the production rate of hydrogen will be remarkably enhanced,reaching 56.8% and 10.6% respectively at 1 250℃.When the cracking temperature is lower than 1 050℃,with a longer residence time,the conversion rate of hydrogen sulfide and the production rate of hydrogen will also markedly increase.When the temperature is higher than 1 050℃ and the residence time has exceeded 0.2 second,the influence of the residence time on the conversion rate of hydrogen sulfide and the production rate of hydrogen will be very small.