Perspective - the need and prospects for negative emission technologies - direct air capture through the lens of current sorption process development.

We provide a perspective on the development of direct air capture (DAC) as a leading candidate for implementing negative emissions technology (NET). We introduce DAC based on sorption, both liquid and solid, and draw attention to challenges that these technologies will face. We provide an analysis of the limiting mass transfer in the liquid and solid systems and highlight the differences. © The Korean Institute of Chemical Engineers 2021.