Electrostatic potential matching guided ultra-microporous COF-300 for C₂H₂/CO₂ separation with scale-up synthesis

Area of Science:

• Materials Science
• Chemical Engineering
• Separation Science

Background:

• Developing advanced porous materials is crucial for efficient gas separation.
• Acetylene (C2H2) and carbon dioxide (CO2) separation is important in industrial processes.
• Ultra-microporous covalent organic frameworks (COFs) offer tunable properties for selective adsorption.

Purpose of the Study:

• To synthesize gram-scale ultra-microporous COF-300 using a one-pot method.
• To investigate the potential of COF-300 for selective acetylene/carbon dioxide separation.
• To elucidate the gas adsorption mechanisms within COF-300.

Main Methods:

• One-pot synthesis of COF-300.
• Gas adsorption experiments and simulations.
• Dynamic breakthrough curve analysis.
• Density Functional Theory (DFT) calculations.

Main Results:

• Gram-scale synthesis of ultra-microporous COF-300 was achieved.
• COF-300 demonstrated selective adsorption of C2H2 over CO2, guided by electrostatic potential matching.
• Experimental and simulation data confirmed COF-300's separation capability.
• DFT calculations revealed detailed interaction mechanisms between COF-300 and gas molecules.

Conclusions:

• COF-300 is a promising adsorbent for C2H2/CO2 separation.
• The one-pot synthesis enables scalable production.
• Electrostatic potential matching is a viable strategy for designing selective adsorbents.
• Understanding interaction mechanisms enhances adsorbent design for gas purification.