High-temperature carbon dioxide capture in a porous material with terminal zinc hydride sites.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39541444.
- Also identified by DOI 10.1126/science.adk5697.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Carbon capture can mitigate point-source carbon dioxide (CO<sub>2</sub>) emissions, but hurdles remain that impede the widespread adoption of amine-based technologies. Capturing CO<sub>2</sub> at temperatures closer to those of many industrial exhaust streams (>200°C) is of interest, although metal oxide absorbents that operate at these temperatures typically exhibit sluggish CO<sub>2</sub> absorption kinetics and instability to cycling. Here, we report a porous metal-organic framework featuring terminal zinc hydride sites that reversibly bind CO<sub>2</sub> at temperatures above 200°C-conditions that are unprecedented for intrinsically porous materials. Gas adsorption, structural, spectroscopic, and computational analyses elucidate the rapid, reversible nature of this transformation. Extended cycling and breakthrough analyses reveal that the material is capable of deep carbon capture at low CO<sub>2</sub> concentrations and high temperatures relevant to postcombustion capture.