Assessing CO₂ Capture in Porous Sorbents via Solid-State NMR-Assisted Adsorption Techniques.

ABSTRACT: Adsorption isotherms obtained through volumetric measurements are widely used to estimate the gas adsorption performance of porous materials. Nonetheless, there is always ambiguity regarding the contributions of chemi- and physisorption processes to the overall retained gas volume. In this work, we propose, for the first time, the use of solid-state NMR (ssNMR) to generate isotherms of CO₂ adsorbed onto an amine-modified silica sorbent. This method enables the separation of six individual isotherms for chemi- and physisorbed CO₂ components, a feat only possible using the discrimination power of NMR spectroscopy. The adsorption mechanism for each adsorbed species was ascertained by tracking their adsorption profiles at various pressures. The proposed method was validat

SUBMITTER: Ilkaeva M 

PROVIDER: S-EPMC10141401 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature