Metal–organic frameworks for C2H2/CO2 separation

Abstract

The separation of C₂H₂ and CO₂ is of industrial significance but is highly challenging due to their close similarities in physical–chemical properties. Metal–organic frameworks (MOFs) with tailored pore structures and tunable pore surfaces for the separation of C₂H₂/CO₂ mixture are described in this perspective article. In terms of adsorption selectivity, MOF is classified into C₂H₂-selective MOF and CO₂-selective MOF, which are discussed separately. Herein, we intend to present a short summary of the important advancements in C₂H₂/CO₂ separation with MOFs. The relationship between the separation performance and structural features of MOFs, together with the separation mechanisms, has been discussed in detail. The challenges, research trends and opportunities in C₂H₂/CO₂ separation with MOFs are highlighted.