Yuan et al. (2026): Monolithic adsorbent with low pressure drop and high cycling stability enabled by an anchor effect for direct air CO₂ capture
Peng Yuan, FeiFan Huang, PeiJun Li, HuiXian Tian, YuChen Zhou, Tao Li, IN: Journal of Environmental Chemical Engineering, https://doi.org/10.1016/j.jece.2026.121233
The continuous rise in atmospheric CO₂ is a major driver of global warming, creating the urgent need for negative emission technologies. Direct air capture (DAC) based on solid amine adsorbents has attracted increasing attention due to their balanced performance in capacity, cost, and scalable fabrication. However, DAC operation typically requires high gas flow rates, making low pressure drop and strong support-active phase binding critical to limiting fan energy consumption and ensuring long-term durability. To address this challenge, a four-channel micro-monolithic adsorbent was developed using an alumina ceramic support, polyethyleneimine (PEI) as the active phase, and 3-aminopropyltriethoxysilane (APS) as a coupling agent.