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Title: CO 2 capture in the sustainable wheat-derived activated microporous carbon compartments

Here, microporous carbon compartments (MCCs) were developed via controlled carbonization of wheat flour producing large cavities that allow CO 2 gas molecules to access micropores and adsorb effectively. KOH activation of MCCs was conducted at 700 °C with varying mass ratios of KOH/C ranging from 1 to 5, and the effects of activation conditions on the prepared carbon materials in terms of the characteristics and behavior of CO 2 adsorption were investigated. Textural properties, such as specific surface area and total pore volume, linearly increased with the KOH/C ratio, attributed to the development of pores and enlargement of pores within carbon. The highest CO 2 adsorption capacities of 5.70 mol kg -1 at 0 °C and 3.48 mol kg -1 at 25 °C were obtained for MCC activated with a KOH/C ratio of 3 (MCC-K3). In addition, CO 2 adsorption uptake was significantly dependent on the volume of narrow micropores with a pore size of less than 0.8 nm rather than the volume of larger pores or surface area. MCC-K3 also exhibited excellent cyclic stability, facile regeneration, and rapid adsorption kinetics. As compared to the pseudofirst-order model, the pseudo-second-order kinetic model described the experimental adsorption data methodically.
Authors:
 [1] ;  [1] ;  [2] ;  [2] ;  [1]
  1. Korea Univ., Seoul (Republic of Korea)
  2. Purdue Univ., West Lafayette, IN (United States)
Publication Date:
Grant/Contract Number:
EE0006832
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; climate-change mitigation; pollution remediation
OSTI Identifier:
1363896

Hong, Seok -Min, Jang, Eunji, Dysart, Arthur D., Pol, Vilas G., and Lee, Ki Bong. CO2 capture in the sustainable wheat-derived activated microporous carbon compartments. United States: N. p., Web. doi:10.1038/srep34590.
Hong, Seok -Min, Jang, Eunji, Dysart, Arthur D., Pol, Vilas G., & Lee, Ki Bong. CO2 capture in the sustainable wheat-derived activated microporous carbon compartments. United States. doi:10.1038/srep34590.
Hong, Seok -Min, Jang, Eunji, Dysart, Arthur D., Pol, Vilas G., and Lee, Ki Bong. 2016. "CO2 capture in the sustainable wheat-derived activated microporous carbon compartments". United States. doi:10.1038/srep34590. https://www.osti.gov/servlets/purl/1363896.
@article{osti_1363896,
title = {CO2 capture in the sustainable wheat-derived activated microporous carbon compartments},
author = {Hong, Seok -Min and Jang, Eunji and Dysart, Arthur D. and Pol, Vilas G. and Lee, Ki Bong},
abstractNote = {Here, microporous carbon compartments (MCCs) were developed via controlled carbonization of wheat flour producing large cavities that allow CO2 gas molecules to access micropores and adsorb effectively. KOH activation of MCCs was conducted at 700 °C with varying mass ratios of KOH/C ranging from 1 to 5, and the effects of activation conditions on the prepared carbon materials in terms of the characteristics and behavior of CO2 adsorption were investigated. Textural properties, such as specific surface area and total pore volume, linearly increased with the KOH/C ratio, attributed to the development of pores and enlargement of pores within carbon. The highest CO2 adsorption capacities of 5.70 mol kg-1 at 0 °C and 3.48 mol kg-1 at 25 °C were obtained for MCC activated with a KOH/C ratio of 3 (MCC-K3). In addition, CO2 adsorption uptake was significantly dependent on the volume of narrow micropores with a pore size of less than 0.8 nm rather than the volume of larger pores or surface area. MCC-K3 also exhibited excellent cyclic stability, facile regeneration, and rapid adsorption kinetics. As compared to the pseudofirst-order model, the pseudo-second-order kinetic model described the experimental adsorption data methodically.},
doi = {10.1038/srep34590},
journal = {Scientific Reports},
number = 1,
volume = 6,
place = {United States},
year = {2016},
month = {10}
}