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

Abstract

<div> <p>Functionalised hypercrosslinked polymers (HCPs) with surface areas between 213 – 1124 m<sup>2</sup>/g based on a range of monomers containing different chemical moieties are evaluated for CO<sub>2</sub> capture using a pressure swing adsorption (PSA) methodology under humid conditions and elevated temperatures. The networks demonstrated rapid CO<sub>2</sub> 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 CO<sub>2</sub> 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 CO<sub>2</sub> from N<sub>2</sub> from industrially applicable simulated gas streams under more realistic conditions.</p> </div> <br>

Molecular Simulation Techniques as Applied to Silica and Carbon-Based Adsorbents for Carbon Capture

“…As a result, extensive research has examined synthesis methods for polymers that minimize catalytically motivated reactions in developing economically attractive polymer sorbents (Figure 17) [137][138][139]. Internally, polymers are made up of complex structures and can come in a variety of configurations.…”