Optimisation of Cu⁺ impregnation of MOF-74 to improve CO/N₂ and CO/CO₂ separations.

ABSTRACT: Carbon monoxide (CO) purification from syngas impurities is a highly energy and cost intensive process. Adsorption separation using metal-organic frameworks (MOFs) is being explored as an alternative technology for CO/nitrogen (N₂) and CO/carbon dioxide (CO₂) separation. Currently, MOFs' uptake and selectivity levels do not justify displacement of the current commercially available technologies. Herein, we have impregnated a leading MOF candidate for CO purification, i.e. M-MOF-74 (M = Co or Ni), with Cu⁺ sites. Cu⁺ allows strong π-complexation from the 3d electrons with CO, potentially enhancing the separation performance. We have optimised the Cu loading procedure and confirmed the presence of the Cu⁺ sites using X-ray absorpt

SUBMITTER: Evans A 

PROVIDER: S-EPMC9049075 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature