Priyadarshini et al. (2023): Direct Air Capture of CO2 Using Amine/Alumina Sorbents at Cold Temperature
Pranjali Priyardashini, Guanhe Rim, Cornelia Rosu, MinGyu Song, and Christopher W. Jones IN: ACS Environmental Au, https://doi.org/10.1021/acsenvironau.3c00010
Significant efforts are underway to develop amine-based sorbents to directly capture CO2 from air (called direct air capture (DAC)) to combat the effects of climate change. However, the sorbents’ performances have usually been evaluated at ambient temperatures (25 °C) or higher, most often under dry conditions. A significant portion of the natural environment where DAC plants can be deployed experiences temperatures below 25 °C, and ambient air always contains some humidity. In this study, the authors assess the CO2 adsorption behavior of amine (poly(ethyleneimine) (PEI) and tetraethylenepentamine (TEPA)) impregnated into porous alumina at ambient (25 °C) and cold temperatures (−20 °C) under dry and humid conditions.