Highly selective CO2 capture by S-doped microporous carbon materials
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- Highly selective CO2 capture by S-doped microporous carbon materials
- Seema, Humaira; Kemp, K. Christian; Le, Nhien H.; Park, Sung-Woo; Chandra, Vimlesh; Lee, Jung Woo; Kim, Kwang S.
- Issue Date
- PERGAMON-ELSEVIER SCIENCE LTD
- CARBON, v.66, pp.320 - 326
- S-doped microporous carbon materials were synthesized by the chemical activation of a reduced-graphene-oxide/poly-thiophene material. The material displayed a large CO2 adsorption capacity of 4.5 mmol g-1 at 298 K and 1 atm, as well as an impressive CO2 adsorption selectivity over N2, CH4 and H2. The material was shown to exhibit a stable recycling adsorption capacity of 4.0 mmol g -1. The synthesized material showed a maximum specific surface area of 1567 m2 g-1 and an optimal CO2 adsorption pore size of 0.6 nm. The microporosity, surface area and oxidized S content of the material were found to be the determining factors for CO2 adsorption. These properties show that the as synthesized S-doped microporous carbon material can be more effective than similarly prepared N-doped microporous carbons in CO2 capture.
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