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-MAAMs, 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 515–532 K. 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.
Highlights
Carbon capture and storage (CCS) is considered as the most viable pathway to cut CO2 emissions from the power and industrial sectors and mitigate the severe consequences of global warming and climate change [1,2,3]
All the samples exhibited Type II isotherms according to the IUPAC classification [45], which is the normal form of isotherm obtained with macroporous or non-porous adsorbents [46]
The completion of monolayer coverage occurred at P/P0 of 0.1 or below and was followed by multilayer adsorption at higher P/P0 values
Summary
Carbon capture and storage (CCS) is considered as the most viable pathway to cut CO2 emissions from the power and industrial sectors and mitigate the severe consequences of global warming and climate change [1,2,3]. MEA is corrosive and the presence of its degradation products in PCC emissions has raised concern over their potential impact on human health and the environment [6]. Solid adsorbents, such as zeolites, activated carbons, metal-organic frameworks (MOFs), functionalised silicas, and polymers, are non-corrosive, environmentally friendly materials, associated with lower energy consumption for regeneration and are considered to be promising substitutes for MEA [7,8,9,10,11]. An ideal solid adsorbent for PCC should have: (1) high CO2 selectivity; (2) acceptable CO2 adsorption capacity; (3) low heat of adsorption; (4) high hydrochemical stability; (5) high thermal and mechanical stability; (6) stable cyclic adsorption capacity; (7) production scalability; (8) suitable morphology; (9) low price; and (10) minimal corrosivity and toxicity [4,7,12,13,14]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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.
