發(fā)布時(shí)間：2018-04-12 06:59

  本文選題：氫能 + 熱化學(xué)硫碘循環(huán)��； 參考：《太陽能學(xué)報(bào)》2017年01期

【摘要】：為了探討電化學(xué)Bunsen反應(yīng)特性,通過自主搭建實(shí)驗(yàn)系統(tǒng),研究Nafion 115膜在電池中的傳輸特性、兩極酸溶液濃縮規(guī)律以及膜兩側(cè)的溶液交叉污染。結(jié)果表明;提高電流密度,膜的質(zhì)子傳遞數(shù)和水滲透系數(shù)均減小,H_2SO_4和HI濃度增加;溫度升高,質(zhì)子傳遞數(shù)快速降低,而水滲透系數(shù)增加,即膜的傳輸特性變差,HI濃度明顯降低,H_2SO_4濃度則增大;增加I_2/HI物質(zhì)的量之比,水滲透系數(shù)和H_2SO_4濃度持續(xù)增大,而HI濃度降低。提高電流密度、溫度或I_2/HI比時(shí),均可促進(jìn)雜質(zhì)的遷移,即加重交叉污染�？梢�,適當(dāng)控制電流密度、降低溫度和I_2/HI物質(zhì)的量之比,有利于實(shí)現(xiàn)最佳的電化學(xué)Bunsen反應(yīng)。
[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.
【作者單位】： 浙江大學(xué)能源清潔利用國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金面上項(xiàng)目(51276170)
【分類號(hào)】：O646;TM911.4

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本文編號(hào)：1738657