Carbon dioxide sequestration requires solid sorbents that would lower down the cost of capture in a CCS operation. For this purpose, we synthesized porous acrylonitrile-divinylbenzene copolymers with pendant nitrile groups and microsphere morphology and most importantly, in large scale. The hollow microspheres were decorated with primary amines through an in situ reduction by borohydrides. CO2 capture capacity of the modified sorbent was increased up to an eight times of the starting porous polymer. Surface area can be easily tuned between 1 to 350 m2/g. Average particle size (1-100 µm) is also quite suitable for CO2 capture applications where processes like fluidized bed require spheres of micron sizes.

Amine functionalized porous polymer microspheres for enhanced CO2 capture

253rd National Meeting (2017)

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