电解铝CO2资源化利用的隔膜电解池的设计
Design of membrane electrolysis cell for CO2 electro-reduction utilized in electrolytic aluminum industry
宋文康 1沈风霞 1吴帅 1华雅鑫 1张金忠 1施锦1
作者信息
- 1. 昆明理工大学 冶金与能源工程学院,云南 昆明 650093
- 折叠
摘要
将工业废气中的CO2转化为高值化学品,创造经济效益,是CO2 高排放行业迫切需要解决的重大现实问题.然而,由于缺乏工业适用的电化学反应装置,研究工作一直未取得实质性突破.针对上述问题,提出了一种新型隔膜电解池,可以在阴极上将CO2电还原为CO,在阳极上将HCl氧化成Cl2,所得CO、Cl2用于合成光气.通过这种方法,不仅可以实现CO2减排,还可以解决含HCl工业废气综合利用问题.为了提高电解CO2制CO的效率,采用无氰电镀法制备了三维流通型Ag/Cu多孔修饰电极,通过提高电极比表面积,增加活性位点,将阴极电流密度提高至46.3 mA/cm2,生成CO的法拉第效率稳定在92.52%.本项研究在电能储存和CO2减排领域具有重要理论研究价值和工程应用前景.
Abstract
The conversion of CO2 to high valuable chemicals using the renewable energy has attracted much attention in chemical industry.However,owing to the lack of efficient technology,no breakthrough has been achieved.In order to solve above problems,a new membrane electrolytic cell was proposed in this work.In the cell,CO2 can be reduced to CO at cathode and HCl can be oxidized to Cl2 at the anode.The obtained CO and Cl2 can be used to synthesize phosgene.In this way,not only can recycling of HCl waste gas be solved,but also CO2 emission reduction can be realized.In order to improve the efficiency of CO2 electroreduction,three-dimensional flowing Ag/Cu porous modified electrode was fabricated by cyanide-free electroplating method.The current density of the cathode reaction is increased to 46.3 mA/cm2 by expanding the specific surface area of the electrode and increasing the active sites on the electrode surface,the Faraday efficiency of CO generation is stable at 92.52%.This work has a high theoretical value and a promising perspective in storage of electric energy and reducing carbon dioxide emission.
关键词
隔膜电解池/CO2电还原/含HCl废气循环利用/多孔修饰电极Key words
membrane electrolysis cell/electroreduction of CO2/recycling of HCl waste gas/porous modified electrode引用本文复制引用
出版年
2024
NETL
NSTL
万方数据