Nitro-Decorated Microporous Covalent Organic Framework (TpPa-NO₂) for Selective Separation of C₂H₄ from a C₂H₂/C₂H₄/CO₂ Mixture and CO₂ Capture

Abstract

A nitro-decorated microporous covalent organic framework, TpPa-NO₂, has been synthesized in a gram scale with a one-pot reaction. It can effectively selectively separate C₂H₄ from a C₂H₂/C₂H₄/CO₂ mixture and capture CO₂ from CO₂/N₂ based on ideal adsorption solution theory calculations and transient breakthrough experiments. Theoretical calculations illustrated that the hydrogen atoms of imine bonds, carbonyl oxygen, and nitro group show high affinity toward C₂H₂ and CO₂, playing vital roles in efficient separation.