Wu et al. (2023): Facile synthesis of structured adsorbent with enhanced hydrophobicity and low energy consumption for CO2 capture from the air

Junye Wu, Yanlin Chen, Yifei Xu, Siyu Chen, Haotian Lv, Zhuozhen Gan, Xuancan Zhu, Ruzhu Wang, Chi-Hwa Wang, Tianshu Ge IN: Matter, https://doi.org/10.1016/j.matt.2023.10.019

Formulating materials into structured configurations is important to improve CO2 capture efficiency. Here, the hydrophobic polystyrene-block-polybutadiene-block-polystyrene (SBS) is used as the binder to coat polyethyleneimine (PEI) mesoporous cellular foam (MCF) onto ceramic fiber honeycombs. It not only makes the powder attach stably and uniformly on the honeycomb but also maintains the porosity for favorable CO2 diffusion. The synthesis was optimized, and a capacity of 0.71 mmol g−1 composite (or 2.33 mmol g−1 adsorbent) in 400 ppm CO2 is presented. The SBS endows the structured adsorbent with enhanced hydrothermal stability, as verified by the steam purge and accelerated stability experiments.