CO₂ capture technologies are key to the ongoing energy transition towards a low-carbon future. Solid adsorption is a promising technology for carbon capture with potential energy savings for regeneration of the material compared to liquid absorption. An interesting route for regeneration is electrical swing adsorption (ESA). An electrically conductive sorbent for direct air capture (DAC) was developed by 3D printing. As sorbent material an amine based ion-exchange resin was selected based on its high CO₂ capacity for DAC with silver coated glass flakes as electrically conductive additive. Different amount of flakes were added to study the percolation threshold of the sorbent. The heating of the sorbents was done by Joule heating and monitored by an infrared camera. Furthermore, the influence of humidity and temperature on the electrical resistivity and volume of the sorbent structures were evaluated.

Solid amine based sorbents with 15 to 35 vol% of silver coated glass flakes were successfully printed. At 20 vol% of flakes, a higher electrical conductivity could be obtained at room temperature and lower humidity. If the humidity increases up to 75 %, the volume of the structures expands with 7 % which causes an increase in electrical resistivity and loss of percolation. At 25 vol% of flakes, percolation is obtained and the resistivity is low enough (<10 Ohm.m) for Joule heating. This resistivity resulted in a heating time of 60 s for heating up to 70 °C, the regeneration temperature of the sorbent. These experiments demonstrate that printed solid amine based sorbent were successfully developed for CO₂ capture and regeneration by ESA.

CO ₂捕获技术是持续向低碳未来能源转型的关键。固体吸附是一种很有前途的碳捕获技术，与液体吸收相比，它可以节省材料再生的能源。一种有趣的再生途径是变电吸附（ESA）。通过 3D 打印开发了一种用于直接空气捕获 (DAC) 的导电吸附剂。_{基于胺基离子交换树脂的高CO 2}容量，选择胺基离子交换树脂作为吸附剂材料，用于DAC，并使用镀银玻璃鳞片作为导电添加剂。添加不同量的薄片来研究吸附剂的渗滤阈值。吸附剂的加热通过焦耳加热完成并由红外摄像机监控。此外，还评估了湿度和温度对吸附剂结构的电阻率和体积的影响。

成功印刷了含有 15 至 35 vol% 镀银玻璃鳞片的固体胺基吸附剂。当薄片含量为 20 vol% 时，在室温和较低湿度下可以获得更高的电导率。如果湿度增加到 75%，结构的体积会膨胀 7%，从而导致电阻率增加和渗滤损失。在 25 vol% 的薄片中，获得渗滤并且电阻率对于焦耳加热而言足够低（<10 Ohm.m）。这种电阻率导致加热到 70°C（吸附剂的再生温度）所需的加热时间为 60 秒。_{这些实验表明，ESA 已成功开发出用于 CO 2}捕获和再生的印刷固体胺基吸附剂。