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

Effective strategies in metal–organic frameworks for C 2 H 2 /CO 2 separation from the perspective of C 2 H 2 -preference and CO 2 -preference. [Display omitted] • Summarize recent advances in MOFs for C 2 H 2 /CO 2 separation from the perspective of C 2 H 2 -preference and CO 2 -preference. • Discuss several well-developed strategies for C 2 H 2 /CO 2 separation as follows: (1) Functional site regulation: metal site regulation, ligand functional modification, and inorganic anion introduction; (2) Structural regulation: pore segmentation and reticular chemistry; (3) Acetylene nanotrap; (4) Unconventional adsorption. • Summarize the potential obstacles and future development prospects from academia to final industrial implementation. The high-efficiency separation of C 2 H 2 /CO 2 has important research significance and industrial value. The currently reported metal–organic framework (MOF) adsorbents for the separation of C 2 H 2 /CO 2 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 C 2 H 2 /CO 2 separation in the past few years according to the properties of the material structure, and prospect the future research directions. [ABSTRACT FROM AUTHOR]