A scalable metal-organic framework as a durable physisorbent for carbon dioxide capture

TLDR

Carbon dioxide capture from fossil fuel combustion typically relies on chemisorption, which is highly selective but incurs a large energy penalty for CO₂ release, motivating the search for physisorbents. The zinc‑based MOF’s central pore binding site blocks hydrogen‑bonding networks with water, enabling selective CO₂ physisorption. The material physisorbs CO₂ with a lower regeneration penalty, preferentially adsorbs CO₂ at 40 % relative humidity, and retains performance at 150 °C flue‑gas conditions. Lin et al.

Abstract

A hydrophobic CO 2 physisorbent Most materials for carbon dioxide (CO 2 ) capture of fossil fuel combustion, such as amines, rely on strong chemisorption interactions that are highly selective but can incur a large energy penalty to release CO 2 . Lin et al . show that a zinc-based metal organic framework material can physisorb CO 2 and incurs a lower regeneration penalty. Its binding site at the center of the pores precludes the formation of hydrogen-bonding networks between water molecules. This durable material can preferentially adsorb CO2 at 40% relative humidity and maintains its performance under flue gas conditions of 150°C. —PDS