Separation of Xylene Isomers through Multiple Metal Site Interactions in Metal-Organic Frameworks.

ABSTRACT: Purification of the C₈ alkylaromatics o-xylene, m-xylene, p-xylene, and ethylbenzene remains among the most challenging industrial separations, due to the similar shapes, boiling points, and polarities of these molecules. Herein, we report the evaluation of the metal-organic frameworks Co₂(dobdc) (dobdc^4- = 2,5-dioxido-1,4-benzenedicarboxylate) and Co₂( m-dobdc) ( m-dobdc^4- = 4,6-dioxido-1,3-benzenedicarboxylate) for the separation of xylene isomers using single-component adsorption isotherms and multicomponent breakthrough measurements. Remarkably, Co₂(dobdc) distinguishes among all four molecules, with binding affinities that follow the trend o-xylene > ethylbenzene > m-xylene > p-xylene. Multicomponent liquid-phase adsorp

SUBMITTER: Gonzalez MI 

PROVIDER: S-EPMC8224533 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature