Yi Xu , Shijie Liu , Jonathan P. Edwards , Yurou Celine Xiao , Yong Zhao , Rui Kai Miao , Mengyang Fan , Yuanjun Chen , Jianan Erick Huang , Edward H. Sargent , David Sinton
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引用次数: 0
摘要
二氧化碳(CO2)的直接空气捕获(DAC)可能有助于减轻过去和抵消难以减少的未来排放;然而，DAC捕获液的再生需要高温和热能输入，其排放会减少其净环境效益。在这里，我们提出了一种低温电化学过程，通过交替电催化(AE)再生碱性捕集液。在单个电极上同时进行氧化和还原反应，在电解槽和燃料电池模式之间循环，减轻了氢碱和卤化氢再生过程中的膜形成和损失。在100 mA cm - 2下，能量输入为6.4 GJ/tCO2，排放强度为~ 11 kg CO2e/tCO2时，CO2可以被捕获和释放。
Regeneration of direct air CO2 capture liquid via alternating electrocatalysis
The direct air capture (DAC) of carbon dioxide (CO2) can potentially contribute to mitigating past and offsetting hard-to-abate future emissions; however, the regeneration of DAC capture liquids requires high temperatures and thermal energy inputs with emissions that diminish their net environmental benefit. Here, we present a low-temperature electrochemical process to regenerate alkaline capture liquids via alternating electrocatalysis (AE). Colocating oxidation and reduction reactions on a single electrode, cycled between electrolyzer and fuel cell modes, mitigates film formation and losses in the regeneration of alkali hydroxide and hydrogen halide. CO2 can be captured and released with an energy input of 6.4 GJ/tCO2 at 100 mA cm−2 and an emission intensity of ∼11 kg CO2e/tCO2.
期刊介绍：
Joule is a sister journal to Cell that focuses on research, analysis, and ideas related to sustainable energy. It aims to address the global challenge of the need for more sustainable energy solutions. Joule is a forward-looking journal that bridges disciplines and scales of energy research. It connects researchers and analysts working on scientific, technical, economic, policy, and social challenges related to sustainable energy. The journal covers a wide range of energy research, from fundamental laboratory studies on energy conversion and storage to global-level analysis. Joule aims to highlight and amplify the implications, challenges, and opportunities of novel energy research for different groups in the field.
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