Carbon capture is one of the foremost methods for curtailing greenhouse gas emissions. Incumbent technologies are inherently inefficient due to thermal energy losses, large footprint, or degradation of sorbent material. We report a solid-state faradaic electro-swing reactive adsorption system comprising an electrochemical cell that exploits the reductive addition of CO₂ to quinones for carbon capture. The reported device is compact and flexible, obviates the need for ancillary equipment, and eliminates the parasitic energy losses by using electrochemically activated redox carriers. An electrochemical cell with a polyanthraquinone–carbon nanotube composite negative electrode captures CO₂ upon charging via the carboxylation of reduced quinones, and releases CO₂ upon discharge. The cell architecture maximizes the surface area exposed to gas, allowing for ease of stacking of the cells in a parallel passage contactor bed. We demonstrate the capture of CO₂ both in a sealed chamber and in an adsorption bed from inlet streams of CO₂ concentrations as low as 0.6% (6000 ppm) and up to 10%, at a constant CO₂ capacity with a faradaic efficiency of >90%, and a work of 40–90 kJ per mole of CO₂ captured, with great durability of electrochemical cells showing <30% loss of capacity after 7000 cylces.

中文翻译：

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法拉第电摇摆反应式吸附，用于CO ₂捕集†

碳捕获是减少温室气体排放的最重要方法之一。现有技术由于热能损失，占地面积大或吸附材料的降解而固有地效率低下。我们报告了固态法拉第电摇摆反应吸附系统，包括一个电化学电池，利用电化学还原法将CO ₂加到醌中进行碳捕获。所报道的装置是紧凑且灵活的，消除了对辅助设备的需要，并且通过使用电化学活化的氧化还原载体消除了寄生能量损失。具有聚蒽醌-碳纳米管复合负极的电化学电池在充电时通过还原的醌的羧化作用捕获CO ₂并释放出CO₂出院时。电池结构使暴露于气体的表面积最大化，从而易于将电池堆叠在平行通道接触器床中。我们展示了在恒定的CO ₂容量和法拉第效率为_{2的情况下}，在低至0.6％（6000 ppm）到最高10％的CO ₂浓度的进口流中，在密闭室和吸附床中都能捕获CO ₂。 > 90％，每摩尔CO ₂捕获的工作量为40-90 kJ，电化学电池的耐久性很高，在7000个循环后显示出<30％的容量损失。