Cage-Like Porous Materials with Simultaneous High C2H2 Storage and Excellent C2H2/CO2 Separation Performance

摘要

Adsorption-based separation is an important technology for C2H2 purification due to the environmentally friendly and energy-efficient advantage. In addition to the high selectivity of C2H2/CO2, the high uptake of C2H2 also plays an important role in the separation progress. However, the trade-off between adsorption capacity and separation performance is still in a dilemma. Herein, we report a series of cage-like porous materials named FJI-H8-R (R=Me, Et, Pr-n and Pr-i) which all have high C2H2 uptakes at 1 bar and 298 K. Dynamic breakthrough studies show that they all exhibit excellent C2H2/CO2 separation performance. Particularly, FJI-H8-Me possesses a long breakthrough time up to 90 min g(-1). Additionally, Grand Canonical Monte Carlo (GCMC) simulation reveals that the suitable pore space and geometry contribute much to the excellent separation performance.