title: Synthesis and CO₂ adsorption properties of molecularly imprinted adsorbents.
abstract: A series of molecularly imprinted adsorbents of CO(2) were developed by molecular self-assembly procedures, using ethanedioic acid, acrylamide, and ethylene glycol dimethacrylate as template, functional monomer, and cross-linker, respectively. Textural properties of these adsorbents were characterized by N(2) adsorption experiment, thermo-gravimetric analysis, and Fourier transform infrared spectroscopy. CO(2) adsorption capacities of adsorbents were investigated by thermo-gravimetric balance under 15% CO(2)/85% Ar atmosphere. Adsorption selectivity of CO(2) was studied by fixed-bed adsorption/desorption experiments. All the adsorbents displayed good thermal stability at 200 °C. Among them, MIP1b, with the higher amine content, exhibited the largest CO(2) capacity, which maintained steady after 50 adsorption-desorption cycles. Although MIP3 showed the highest specific surface, the CO(2) capacity was lower than that of MIP1b. CO(2) adsorption mechanism of molecularly imprinted adsorbents was determined to be physical sorption according to the adsorption enthalpies integrated from the DSC heatflow profiles. The calculated separation factors of CO(2) under 15% CO(2)/85% N(2) atmosphere were above 100 for all adsorbents.
authors.affiliation: School of Environmental Science & Engineering, North China Electric Power University, Baoding 071003, People's Republic of China. zhaoyi9515@163.com
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhao
authors.forename: Yanmei
authors.initials: Y
authors.lastname: Shen
authors.forename: Lu
authors.initials: L
authors.lastname: Bai
authors.forename: Rongjie
authors.initials: R
authors.lastname: Hao
authors.forename: Liyan
authors.initials: L
authors.lastname: Dong
mesh_terms: D020106:Acrylamide / Q000737:chemistry; D000327:Adsorption; D000397:Air Pollution / Q000517:prevention & control*; D002245:Carbon Dioxide / Q000737:chemistry*; D057965:Carbon Sequestration; D008689:Methacrylates / Q000737:chemistry; D054802:Molecular Imprinting / Q000379:methods*; D010070:Oxalates / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry
chemical_list: D008689:Methacrylates; D010070:Oxalates; D002245:Carbon Dioxide; D020106:Acrylamide; C004919:ethylene dimethacrylate