硫碘循环中电化学Bunsen反应特性研究

发布时间：2018-04-12 06:59

本文选题：氢能 + 热化学硫碘循环　；参考：《太阳能学报》2017年01期

【摘要】：为了探讨电化学Bunsen反应特性,通过自主搭建实验系统,研究Nafion 115膜在电池中的传输特性、两极酸溶液浓缩规律以及膜两侧的溶液交叉污染。结果表明;提高电流密度,膜的质子传递数和水渗透系数均减小,H_2SO_4和HI浓度增加;温度升高,质子传递数快速降低,而水渗透系数增加,即膜的传输特性变差,HI浓度明显降低,H_2SO_4浓度则增大;增加I_2/HI物质的量之比,水渗透系数和H_2SO_4浓度持续增大,而HI浓度降低。提高电流密度、温度或I_2/HI比时,均可促进杂质的迁移,即加重交叉污染。可见,适当控制电流密度、降低温度和I_2/HI物质的量之比,有利于实现最佳的电化学Bunsen反应。
[Abstract]:In order to investigate the characteristics of electrochemical Bunsen reaction, the transport characteristics of Nafion 115 membrane in the battery, the concentration law of the bipolar acid solution and the cross contamination of the solution on both sides of the membrane were studied by building an experimental system.The results show that when the current density is increased, the proton transfer number and the water permeability coefficient of the membrane decrease, while the H _ 2SO _ 4 and HI concentrations increase, the proton transfer number decreases rapidly and the water permeability coefficient increases with the increase of the temperature.The concentration of H2SO4 increased with the increase of the ratio of I_2/HI, the water permeability coefficient and H_2SO_4 concentration increased, but the HI concentration decreased.When the current density, temperature or I_2/HI ratio are increased, the impurity migration can be promoted, that is, the cross pollution is aggravated.It can be seen that the optimal electrochemical Bunsen reaction can be achieved by controlling the current density and decreasing the ratio of the temperature to the amount of I_2/HI.
【作者单位】：浙江大学能源清洁利用国家重点实验室;
【基金】：国家自然科学基金面上项目(51276170)
【分类号】：O646;TM911.4

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