Benchmarking selective capture of trace CO2 from C2H2 using an amine-functionalized adsorbent

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: March 16, 2025

Purifying C2H2 by removing trace CO2 is critically needed yet challenged their analogous physical properties. Herein, we report a commercial resin adsorbent HP20 (Diaion® HP-20 Resin) loaded with polyethyleneimine (PEI@HP20) which selectively captures and excludes C2H2. PEI@HP20 possesses high adsorption capacity (4.35 mmol/g) at 100 kPa 298 K record CO2/C2H2 uptake ratio compared all reported CO2-selective adsorbents. The ideal adsorbed solution theory selectivity reaches 1.33×107. pilot-scale pressure-temperature swing on 2 kg further validated that it can obtain >99.99% purity from CO2/C2H2(1/99, v/v) mixtures yield of 344.7 g per cycle. combination multinuclear solid-state Nuclear Magnetic Resonance, Fourier Transform infrared spectroscopy density functional calculations reveal the performance relies dual chemisorption/physisorption mechanism. This work highlights promising method to develop green, low cost, efficiency, readily scalable adsorbent. but challenging due authors production for selective capture traces exclusion

Language: Английский

Rigid shell and flexible pore for highly efficient and reversible sulfur-carbon co-adsorption by hierarchical porous Mg-gallate@Poly(acrylate)

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 359, P. 130550 - 130550

Published: Nov. 14, 2024

Language: Английский