Metal-organic frameworks for C2H2/CO2 separation: Recent development

The high-efficiency separation of C2H2/CO2 has important research significance and industrial value. The currently reported metal–organic framework (MOF) adsorbents for the separation of C2H2/CO2 are generally based on unsaturated metal sites, strong hydrogen bonds or strong electrostatic interaction sites, which suffer from difficulties in combining selectivity and capacity. Significant efforts have been devoted to solving this trade-off effect, and considerable achievements have been made. Herein, we review the research progress of MOFs for C2H2/CO2 separation in the past few years according to the properties of the material structure, and prospect the future research directions.