摘要
对热化学硫碘制氢中的碘化氢分解反应进行了化学热力学、动力学模拟以及实验研究,同时利用热力学的方法研究了氢气选择性膜对碘化氢分解率的影响。化学热力学模拟中,500℃下,HI的分解率只达到22.8%。但利用膜分离只移走氢气和同时移走氢气和碘蒸气的情况下,分解率分别增长了30.3%和54.8%。化学动力学模拟中,随温度的升高,HI浓度降低曲线呈现一定的线形规律,该分解反应对温度的敏感性较高。通过实验结果和动力学模拟结果的对比,该动力学模型能较好地描述HI分解的化学反应历程。
Thermodynamics, kinetics and experimental study on homogeneous decomposition of hydrogen iodide for sulfuriodine thermoehemieal cycle were investigated. Selective membrane used for HI decomposition was also studied by thermodynamics. According to thermodynamics results, the HI conversion at 500℃ was about 22.8%. But the HI conversion at 450℃ increased to 52. 3% in the case of removing hydrogen and 76.8% in the case of removing both hydrogen and iodine by selective membrane. According to kinetics results, the mole of HI fell linearly as temperature increased at dif- ferent reaction time, latm. HI decomposition reaction is sensitive to temperature. The new detailed kinetics model can describe homogeneous decomposition of HI after comparison between experiment and simulation at different temperature.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2008年第9期1149-1154,共6页
Acta Energiae Solaris Sinica
基金
教育部博士点基金(20050335046)
浙江省自然科学基金(Y106538)
