Inorganic Chemistry

A Pressure Swing Approach to Selective CO2 Sequestration Using Functionalised Hypercrosslinked Polymers

Robert Dawson University of Sheffield


Functionalised hypercrosslinked polymers (HCPs) with surface areas between 213 – 1124 m2/g based on a range of monomers containing different chemical moieties are evaluated for CO2 capture using a pressure swing adsorption (PSA) methodology under humid conditions and elevated temperatures. The networks demonstrated rapid CO2 uptake reaching maximum uptakes in under 60 seconds. The most promising networks demonstrating the best selectivity and highest uptakes were applied to a pressure swing setup using simulated flue gas streams. The carbazole, triphenylmethanol and triphenylamine networks were found to be capable of converting a dilute CO2 stream (> 20 %) into a concentrated stream (> 85 %) after only two pressure swing cycles from 20 bar (adsorption) to 1 bar (desorption). This work demonstrates the ease by which readily synthesised functional porous materials can be successfully applied to a pressure swing methodology and used to separate CO2 from N2 from industrially applicable simulated gas streams under more realistic conditions.


Thumbnail image of Pressure swing paper_ChemRxiv.pdf
download asset Pressure swing paper_ChemRxiv.pdf 1 MB [opens in a new tab]

Supplementary material

Thumbnail image of PSA_Supporting_Information 2019_08_06.pdf
download asset PSA_Supporting_Information 2019_08_06.pdf 0.98 MB [opens in a new tab]
PSA Supporting Information 2019 08 06