Covalent Organic Polymers (COPs) For Enhanced CO2 Adsorption
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COVALENT ORGANIC POLYMERS (COPs) FOR ENHANCED CO2 ADSORPTION
CAFER T. YAVUZ MERT ATILHAN

Graduate School of EEWS, KAIST, 373-1 Guseong Dong, Yuseong Gu, 305-701 Daejeon, Korea –
yavuz@kaist.ac.kr
Department of Chemical Engineering, Qatar University, P.O. Box 2710, Doha, Qatar

Abstract
Efficient CO2 scrubbing without a significant energy penalty remains an outstanding challenge for
fossil fuel-burning industry where aqueous amine solutions are still widely used. Porous materials
have long been evaluated for next generation CO2 adsorbents. Porous polymers, robust and
inexpensive, show promise as feasible materials for the capture of CO2 from warm exhaust fumes. We
report the syntheses of porous covalent organic polymers (COPs) with CO2 adsorption capacities of up
to 5616 mg/g (measured at high pressures, i.e. 200 bar) and industrially relevant temperatures (as
warm as 65 oC). COPs are stable in boiling water for at least one week and near infinite CO2/H2
selectivity is observed. COPs 1-2 feature basic nitrogen sites that show chemospecific affinity towards
acidic gases such as CO2. Post combustion carbon capture from fossil fuel power plants demands
pressures of up to 6 bar and a minimum temperature of 40 oC. By tuning their architecture, we show
that COPs reach to 3 mmol CO2/g sorbent at 6 bar and 45 oC. High and low pressure capacities make
these porous polymer structures viable alternatives to amine scrubbers1.
1 H. A. Patel, F. Karadas, A. Canlier, J. Park, E. Deniz, Y. Jung, M. Atilhan*, C. T. Yavuz*, J. Mater. Chem.,
22, 8431-8437, (2012).