Sulfonate-grafted porous polymer networks for preferential CO2 adsorption at low pressure.
A porous polymer network (PPN) grafted with sulfonic acid (PPN-6-SO(3)H) and its lithium salt (PPN-6-SO(3)Li) exhibit significant increases in isosteric heats of CO(2) adsorption and CO(2)-uptake capacities. IAST calculations using single-component-isotherm data and a 15/85 CO(2)/N(2) ratio at 295 K and 1 bar revealed that the sulfonate-grafted PPN-6 networks show exceptionally high adsorption selectivity for CO(2) over N(2) (155 and 414 for PPN-6-SO(3)H and PPN-6-SO(3)Li, respectively). Since these PPNs also possess ultrahigh physicochemical stability, practical applications in postcombustion capture of CO(2) lie well within the realm of possibility.
Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States.
Weigang
W
Lu
Daqiang
D
Yuan
Julian
J
Sculley
Dan
D
Zhao
Rajamani
R
Krishna
Hong-Cai
HC
Zhou
D000327:Adsorption; D002245:Carbon Dioxide / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D011312:Pressure; D013451:Sulfonic Acids / Q000737:chemistry*; D013499:Surface Properties
D011108:Polymers; D013451:Sulfonic Acids; D002245:Carbon Dioxide; D009584:Nitrogen