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Title: Nitrogen-rich hyper-crosslinked polymers for low-pressure CO2 capture
Authors: Fayemiwo, Kehinde A.
Vladisavljevic, Goran T.
Nabavi, Seyed Ali
Benyahia, Brahim
Hanak, Dawid P.
Loponov, Konstantin N.
Manovic, Vasilije
Keywords: Amine and amide groups
CO2 solid adsorbent
Hyper-crosslinked polymeric particles
Methacrylamide
Carbon capture and storage
Post-combustion CO2 capture
Issue Date: 2017
Publisher: Elsevier
Citation: FATEMIWO, K.A. ...et al., Nitrogen-rich hyper-crosslinked polymers for low-pressure CO2 capture. Chemical Engineering Journal, 334, pp. 2004-2013.
Abstract: A series of poly[methacrylamide-co-(ethylene glycol dimethacrylate)] (poly(MAAM-co-EGDMA)) porous polymeric particles with high CO2-philicity, referred to as HCP-MAAM, were synthesised for CO2 capture. The polymers with a MAAM-to-EGDMA molar ratio from 0.3 to 0.9 were inherently nitrogen-enriched and exhibited a high affinity towards selective CO2 capture at low pressures. A techno-economic model based on a 580 MWel supercritical coal-fired power plant scenario was developed to evaluate the performance of the synthesised adsorbents. The presence and density of NH2 moieties within the polymer network were determined using Fourier transform infrared (FTIR) spectroscopy and x-ray photoelectron spectroscopy (XPS). The thermogravimetric analysis (TGA) showed that the polymers were thermally stable up to 242-259°C. The maximum CO2 adsorption capacity at 273 K was 1.56 mmol/g and the isosteric heat of adsorption was 28−35 kJ/mol. An increase in the density of amide groups within the polymer network resulted in a higher affinity towards CO2 at low pressure. At a CO2:N2 ratio of 15:85, CO2/N2 selectivity at 273 K was 52 at 1 bar and reached 104 at ultra-low CO2 partial pressure. The techno-economic analysis revealed that retrofitting a HCP-MAAM-based CO2 capture system led to a net energy penalty of 7.7–8.0%HHV points, which was noticeably lower than that reported for MEA or chilled ammonia scrubbing capture systems. The specific heat requirement was superior to the majority of conventional solvents such as MDEA-PZ and K2CO3. Importantly, the economic performance of the HCP-MAAM retrofit scenario was found to be competitive to chemical solvent scrubbing scenarios.
Description: This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Sponsor: This work was supported by the coERCe granted by Innovate UK, project Grant: 102213, and Cambridge Engineering and Analysis Design (CEAD) Ltd.
Version: Published
DOI: 10.1016/j.cej.2017.11.106
URI: https://dspace.lboro.ac.uk/2134/27559
Publisher Link: https://doi.org/10.1016/j.cej.2017.11.106
ISSN: 1385-8947
Appears in Collections:Published Articles (Chemical Engineering)

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