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双膜双非水性/水性电解质流电池操作,用于电化学转换CO2到甲基酸盐

Manu Gautam¹, Francois Nkurunziza¹, Matthew C Mulvehill¹

¹Conn Center for Renewable Energy Research, University of Louisville, Louisville, Kentucky, 40292, USA.

|November 6, 2023

概括

这项研究开发了一种双膜流电解器,用于从二氧化碳 (CO2) 和甲醇有效地生产甲基甲酸盐. 新型反应堆设计克服了洪水问题,实现了42.9%的法拉迪克效率.

科学领域:

电化学电化学电化学
化学工程是化学工程的重要组成部分.
材料科学材料科学材料科学

背景情况:

在非水性溶剂中的并列阴极反应使得新的二氧化碳电还原产品成为可能.
电化学转化二氧化碳通过酸和甲醇化转化为甲基甲酸提供了高选择性.
流电解器设计面临着非水性阴解质的挑战,特别是气体扩散电极泛滥.

研究的目的:

设计和评估一个双膜流电解器,以高效地生产甲基甲酸盐.
为了克服非水性CO2电解中的催化剂泛滥问题.
调查水度对性能的影响,并确定材料限制.

主要方法:

采用了一种双膜流电解器,其中包含了阴离子和阴离子交换膜.
采用流动的甲醇阴解质和水性阳解质.
测试的性能与不同的含水量在阴解质.

主要成果:

在使用纯甲醇生产甲基甲酸盐时,获得了42.9%的Faraday效率.
证明稳定的性能超过80分钟.
观察到细胞阻力增加和较低的电流密度与低含水量的阴极体.

结论:

双膜设计有效地防止了非水性流电解器中的阴解体泛滥.
甲基甲酸盐选择性和与水度相关的电流密度之间存在一个权衡.
开发新的离子体对于优化甲醇等非水性溶剂的性能至关重要.

关键词:

减少二氧化碳的减少流量电解器的电解器甲醇是甲醇中的一种.甲基甲酸盐甲基甲基甲酸盐甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基其他非水性物质.

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