Abstract
Adsorption using solid amine sorbents is an attractive emerging technology for energy-efficient carbon capture. Current syntheses for solid amine sorbents mainly based on physical impregnation or grafting-to methods (for example, aminosilane-grafting) lead to limited sorbent performance in terms of stability and working capacity, respectively. Here we report a family of solid amine sorbents using a grafting-from synthesis approach and synthesized by cationic polymerization of oxazolines on mesoporous silica. The sorbent with high amount of covalently tethered amines shows fast adsorption rate, high amine efficiency and sorbent capacity well exceeding the highest value reported to date for low-temperature carbon dioxide sorbents under simulated flue gas conditions. The demonstrated efficiency of the new amine-immobilization chemistry may open up new avenues in the development of advanced carbon dioxide sorbents, as well as other nitrogen-functionalized systems.
Highlights
Adsorption using solid amine sorbents is an attractive emerging technology for energyefficient carbon capture
CO2 adsorption using solid amine sorbents has been proposed as an attractive alternative for post-combustion carbon capture[3,4,5,6,7,8,9,10,11,12,13,14,15,16]
As amine molecules are immobilized onto the solid sorbent supports, the issues associated with the use of liquid amines can be minimized
Summary
Adsorption using solid amine sorbents is an attractive emerging technology for energyefficient carbon capture. These sorbents exhibit high CO2 capacities up to 5.6 mmol g À 1 and good sorbent stability after 11 adsorption–desorption cycles under controlled gas conditions (humidified 10% CO2 with B1.6% water)[5,23].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
