Wang, Jun ; Krishna, Rajamani ; Wu, Xiaofei ; Sun, Yingqiang ; Deng, Shuguang (2015) Polyfuran-derived microporous carbons for enhanced adsorption of CO2 and CH4 Langmuir, 31 (36). pp. 9845-9852. ISSN 0743-7463
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Official URL: http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.5...
Related URL: http://dx.doi.org/10.1021/acs.langmuir.5b02390
Abstract
Oxygen-doped microporous carbons were synthesized by chemical activation of polyfuran with KOH or ZnCl2 at 600 and 800 °C. It was found that KOH preserves and ZnCl2 eliminates the O–C functional groups in the activation process. The O-doped carbon activated with KOH at 800°C exhibited a high CO2 capacity (4.96 mmol g-1, 273 K, 1 bar) and CH4 adsorption capacity (2.27 mmol g-1, 273 K, 1 bar). At 298 K and 1 bar, a very high selectivity for separating CO2/N2 (41.7) and CO2/CH4 (6.8) gas mixture pairs was obtained on the O-doped carbon activated with KOH at 600°C. The excellent separation ability of the O-doped carbons was demonstrated in transient breakthrough simulations of CO2/CH2/N2 mixtures in a fixed bed adsorber. The isosteric adsorption heats of the O-doped carbons were also significantly lower than those of MOF-74 and NaX zeolite. The O-doped microporous carbon adsorbents appear to be a very promising adsorbent for CO2 capture from flue gas, biogas upgrading and CH4 storage.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Chemical Society. |
ID Code: | 111775 |
Deposited On: | 26 Sep 2017 12:17 |
Last Modified: | 26 Sep 2017 12:17 |
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