Highly efficient CO₂ capture with a metal–organic framework-derived porous carbon impregnated with polyethyleneimine

چکیده مقاله

Global warming is considered as one of the great challenges of the twenty-first century. Application of CO₂ capture and storage technologies to flue gas is considered to be a useful method of lessening global warning. Highly porous carbon has played an important role in tackling energy and environmental problems. We attempted to synthesize a highly porous carbon adsorbent by carbonizing a highly crystalline metal–organic framework (MOF) without any carbon precursors and focused on the adsorption of CO₂ and CH₄ gases and CO₂/CH₄ selectivity at 298, 323 and 348 K using a volumetric apparatus. The MOF-derived porous carbon (MDC) was prepared by direct carbonization of MOF-199 as a template at 900 °C under nitrogen atmosphere. Amino-impregnated MDC samples exhibited enhanced adsorption capacities by a combination of physical and chemical adsorption. Polyethyleneimine (PEI) was selected as the amine source, which was found to greatly enhance CO₂ capture when supported on the porous carbon. Novel PEI-impregnated MDC nanocomposites were synthesized by wetness impregnation and then characterized using various methods. Copyright © 2018 John Wiley & Sons, Ltd.