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A Study of Carbonate Formation Kinetics and Morphological Effects Observed on OH~- form of Pfaem When Exposed to Air Containing CO_2

机译:含有CO_2空气喷空气时对PFAEM的碳酸酯形成动力学和形态学效应的研究

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For AEMFC, OH~- form of membrane reacts with CO_2 when exposed to air leading to loss in conductivity. Very few attempts have been made to understand the reaction kinetics, morphological properties and equilibrium concentrations at different environmental conditions. We have attempted to study the CO_2 kinetics and its effect on water-uptake (or lambda) and morphology (SAXS) when the OH~- form of membrane is exposed to air which has approx. 400 ppm of CO_2. The kinetics was studied by exposing the membrane to controlled environment and titrating it using Warder and Winkler titration methods. From transient SAXS analysis we observe the intensity of ionomer feature of membrane spectrum dropping over time. Also the d-spacing at equilibrium is lower than the initial value. Ultimately we want to understand the effect of CO_2 on membrane from every aspect and possibly help us think about strategies to mitigate the problem.
机译:对于AEMFC,OH〜 - 膜的形式与CO_2发生在暴露于通风时导致导电性损失。已经少量尝试了解不同环境条件下的反应动力学,形态学性质和平衡浓度。当膜的OH〜 - 形式暴露于大约时,我们试图研究CO_2动力学及其对水摄取(或λ)和形态(萨克斯)的影响。 400 ppm的co_2。通过将膜暴露于受控环境并使用沃克勒和Winkler滴定方法滴定动力学来研究动力学。从瞬时撒克塞分析中,我们观察膜谱随时间掉落的离子聚焦特征的强度。平衡下的D间距低于初始值。最终,我们希望了解来自各个方面的CO_2对膜的影响,可能有助于我们考虑减轻问题的策略。

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