title: Amine-tethered adsorbents based on three-dimensional macroporous silica for CO(2) capture from simulated flue gas and air.
abstract: New covalently tethered CO2 adsorbents are synthesized through the in situ polymerization of N-carboxyanhydride (NCA) of l-alanine from amine-functionalized three-dimensional (3D) interconnected macroporous silica (MPS). The interconnected macropores provide low-resistant pathways for the diffusion of CO2 molecules, while the abundant mesopores ensure the high pore volume. The adsorbents exhibit high molecular weight (of up to 13058 Da), high amine loading (more than 10.98 mmol N g(-1)), fast CO2 capture kinetics (t1/2 < 1 min), high adsorption capacity (of up to 3.86 mmol CO2 g(-1) in simulated flue gas and 2.65 mmol CO2 g(-1) in simulated ambient air under 1 atm of dry CO2), as well as good stability over 120 adsorption-desorption cycles, which allows the overall CO2 capture process to be promising and sustainable.
authors.affiliation: Engineering Research Center of High Performance Polymer and Molding Technology, Ministry of Education, and ‡College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology , Qingdao 266042, China.
authors.forename: Fa-Qian
authors.initials: FQ
authors.lastname: Liu
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Zhao-Ge
authors.initials: ZG
authors.lastname: Huang
authors.forename: Chao-Qin
authors.initials: CQ
authors.lastname: Li
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Rong-Xun
authors.initials: RX
authors.lastname: Li
authors.forename: Wei-Hua
authors.initials: WH
authors.lastname: Li
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000737:chemistry*; D000409:Alanine / Q000737:chemistry; D000588:Amines / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000295:instrumentation* / Q000379:methods; D007700:Kinetics; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D000588:Amines; D002245:Carbon Dioxide; D012822:Silicon Dioxide; D000409:Alanine