期刊
FUEL
卷 95, 期 1, 页码 360-364出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2011.10.072
关键词
Nitrogen-rich carbon; Hierarchical micro-mesopore structure; CO2 capture
资金
- Carbon Dioxide Reduction & Sequestration R&D Center (CDRS), of the 21st Century Frontier R&D Programs in Korea
A nitrogen-rich carbon with a hierarchical micro-mesopore structure was obtained through pyrolysis of a porous polymer prepared from terephthalaldehyde and melamine, and then investigated for CO2 capture. This nitrogen-rich porous carbon exhibited a CO2 uptake of 141 mg/g at 25 degrees C, 1 atm, which is one of the highest CO2 capture capacities among carbon materials reported to date under these conditions. Excellent separation selectivity against N-2 (CO2/N-2 selectivity of ca. 32) was achieved. Also, fast adsorption-desorption kinetics were exhibited, and adsorbent regeneration was achieved by a simple helium purge at 25 degrees C. Ten consecutive adsorption-desorption test cycles established the material's excellent stability as a CO2 adsorbent. These outstanding features as a CO2 adsorbent were mostly attributed to the material's high content of basic nitrogen species, in addition to its physical properties (high surface area and hierarchical micro-mesoporosity). (C) 2011 Elsevier Ltd. All rights reserved.
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