Abstract
Poly(ethyleneimine) (PEI) impregnated adsorbents are promising alternatives to amine-based liquid absorbents for post-combustion capture of CO2. A current challenge is to identify meso- and/or macroporous supports with large pore volumes that can be facilely synthesized from a cost-effective approach as supports for PEI. In this work, hierarchically nanoporous poly(divinylbenzene) (PDVB) is synthesized through a one-step polymerization of readily available divinylbenzene (DVB) under solvothermal conditions without use of any template or catalyst. The synthesized PDVB is found to have abundant meso-macropores, as well as a large pore volume. Subsequently, a series of PEI-impregnated PDVB sorbents is prepared and their performance for the selective adsorption of CO2is investigated. The PEI-PDVB composites are found to exhibit promising CO2capacities and exceptionally high CO2/N2selectivities. The strength of CO2adsorption is experimentally determined by direct calorimetric measurements. The PEI-PDVB composites show excellent stability under both dry and humidified sorption conditions during extended adsorption-desorption cycles. Based on the results obtained, these PEI-PDVB composites are identified as sorbents with significant potential for application in practical CO2capture from industrial gas streams.
Original language | English |
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Pages (from-to) | 466-476 |
Number of pages | 11 |
Journal | Chemical Engineering Journal |
Volume | 314 |
DOIs | |
State | Published - 2017 |
Funding
This work was supported as part of the Center for Understanding and Control of Acid Gas-Induced Evolution of Materials for Energy (UNCAGE-ME), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Award No. DE-SC0012577.
Keywords
- COadsorption
- Physical impregnation
- Poly(divinylbenzene)
- Poly(ethyleneimine)
- Porous polymer
- Selectivity