Monodentate hydroxide as a super strong yet reversible active site for CO2 capture from high-humidity flue gas. Issue 3 (22nd January 2015)

• Record Type: Journal Article
• Authors: Liao, Pei-Qin; Chen, Huayao; Zhou, Dong-Dong; Liu, Si-Yang; He, Chun-Ting; Rui, Zebao; Ji, Hongbing; Zhang, Jie-Peng; Chen, Xiao-Ming
• Is Part Of: Energy & environmental science. Volume 8:Issue 3(2015)
• Page Start: 1011
• Page End: 1016
• Publication Date: 2015-01-22
• Subjects: Energy conversion -- Periodicals; Fuel switching -- Periodicals; Environmental sciences -- Periodicals; Environmental chemistry -- Periodicals; 333.79
• DOI: 10.1039/c4ee02717e
• Languages: English
• ISSNs: 1754-5692

Abstract

Abstract : Reversible chemisorption of CO2 is realized by introducing monodentate hydroxide onto the pore surface of metal–organic frameworks. Abstract : We demonstrate here that porous coordination frameworks, functionalized with monodentate hydroxide on the pore surface, can achieve ultrahigh CO2 adsorption affinity (124 kJ mol −1 ), adsorption capacity (9.1 mmol cm −3 at 298 K and 1 bar), and CO2 /N2 selectivity (262 at 298 K) by the reversible formation/decomposition of bicarbonate in the adsorption/desorption processes. More importantly, these materials can capture up to 4.1 mmol cm −3 or 13.4 wt% of CO2 from simulated flue gases (CO2 pressure 0.10–0.15 bar at 313 K) even at high relative humidity (82%) and quickly release it under mild regeneration conditions (N2 purge at 358 K), representing the best CO2 capture performances reported to date.