关于混合硫酸盐中阴离子交换膜的离子导电性,使用双相模型
Liansheng Wu1, Haodong Jiang1, Tao Luo1
1Ministry of Education's Research Center for Comprehensive Utilization and Clean Process Engineering of Phosphorous Resources, School of Chemical Engineering, Sichuan University, Chengdu 610065, China.
Membranes
|October 27, 2023
概括
两相模型准确地预测了与混合反离子的离子交换膜导电性. 这项研究增强了对复杂的电解质溶液中的膜微观结构和离子导电性的理解.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 当代的两相模型有效地解释了基于凝和凝间相的离子交换膜 (IEM) 导电性.
- 以前的模型主要集中在单个反离子系统上,限制了对混合离子电解质的理解.
研究的目的:
- 将两相模型适应并应用于含有混合对离子的电解质.
- 研究混合离子系统中膜离子导电性和微观结构之间的相关性.
- 通过商用阴离子交换膜 (CEM) 评估模型的预测准确性.
主要方法:
- 将两相模型应用于与混合MgSO4 + Na2SO4和H2SO4 + Na2SO4电解质处于平衡状态的CEM.
- 从OLI Studio.使用模拟的离子流动性计算的凝间相导率 (κin).
- 研究了对抗离子组成和相互作用参数对膜导电性的影响.
主要成果:
- 两相模型使用实验性反离子组合和流动性准确预测了总膜导电性 (κT).
- 与使用外部溶液导电性 (κs) 相比,使用模拟离子移动性的 κin 计算显著提高了模型准确性.
- 在混合电解质中观察到CEM导电性和反离子组成之间的非线性相关性.
结论:
- 当代的双相模型适用于并有效预测混合反离子电解质中的离子交换膜导电性.
- 这项研究为在混合离子条件下膜微观结构和导电性之间的关系提供了新的见解.
- 这些发现强调了准确的离子流动性计算对于模型预测中的间阶段的重要性.
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