Dramatic tuning of carbon dioxide uptake via metal substitution in a coordination polymer with cylindrical pores.
A series of four isostructural microporous coordination polymers (MCPs) differing in metal composition is demonstrated to exhibit exceptional uptake of CO2 at low pressures and ambient temperature. These conditions are particularly relevant for capture of flue gas from coal-fired power plants. A magnesium-based material is presented that is the highest surface area magnesium MCP yet reported and displays ultrahigh affinity based on heat of adsorption for CO2. This study demonstrates that physisorptive materials can achieve affinities and capacities competitive with amine sorbents while greatly reducing the energy cost associated with regeneration.
Caskey
Stephen R
SR
Department of Chemistry and Macromolecular Science and Engineering Program, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan, 48109-1055, USA.
Wong-Foy
Antek G
AG
Matzger
Adam J
AJ
D000588:Amines / Q000737:chemistry; D002245:Carbon Dioxide / Q000737:chemistry*; D008024:Ligands; D008274:Magnesium / Q000737:chemistry*; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000737:chemistry*; D010795:Phthalic Acids / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D011312:Pressure; D013499:Surface Properties; D013696:Temperature
D000588:Amines; D008024:Ligands; D009942:Organometallic Compounds; D010795:Phthalic Acids; D011108:Polymers; D002245:Carbon Dioxide; D008274:Magnesium