Building multiple adsorption sites in porous polymer networks for carbon capture applications

Abstract

IAST calculations reveal that sulfonate ammonium salt grafting renders porous polymer networks (PPN-6-SO₃NH₄) with exceptionally high adsorption selectivity for CO₂ over N₂ and CO₂ over CH₄. Breakthrough experiments confirm the high CO₂ adsorption capacity (1.7 mmol g⁻¹, 75 mg g⁻¹) by feeding 15% CO₂ balanced with N₂ at 295 K and 1 bar.