In-situ HKUST-1 growth into inner pores of activated carbon granule for CO2 efficient capture

Abstract

Metal-organic frameworks (MOFs) are efficient adsorption materials for carbon capture and storage. We proposed a strategy of solid-liquid in-situ reaction method to grow MOFs in activated carbon granule (AC), preparing high efficient CO2 adsorbent. At first, metal salts were solidified in the pores of AC granule carriers by 445 K treating. Then the organic ligands were introduced into the pores of AC. The MOF can be successfully prepared by solidliquid reaction method. By this method, MOFs uniformly disperse in AC pores, making it possible for MOFs used in fixed bed adsorption separation. The CO2 adsorption was tested by conducting breakthrough experiments in a fixed bed. When organic ligand concentration increased from 0 to 6%, the CO2 uptake value increased from 0.2868 mmol⋅g−1 to 0.3324 mmol⋅g−1 in the CO2/Air atmosphere with CO2 concentration of 10%. The CO2 uptake value increased 67% at 5000 PPM compared to original AC.