CO2 capture in the sustainable wheat-derived activated microporous carbon compartments

Seok Min Hong, Eunji Jang, Arthur D. Dysart, Vilas G. Pol, Ki Bong Lee

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

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 pseudo-first-order model, the pseudo-second-order kinetic model described the experimental adsorption data methodically.

Original languageEnglish
Article number34590
JournalScientific Reports
Volume6
DOIs
Publication statusPublished - 2016 Oct 4

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Carbon
Adsorption
Chemical activation
Kinetics
Carbonization
Specific surface area
Activated carbon
Pore size
Gases
Molecules

ASJC Scopus subject areas

  • General

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CO2 capture in the sustainable wheat-derived activated microporous carbon compartments. / Hong, Seok Min; Jang, Eunji; Dysart, Arthur D.; Pol, Vilas G.; Lee, Ki Bong.

In: Scientific Reports, Vol. 6, 34590, 04.10.2016.

Research output: Contribution to journalArticle

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. In: Scientific Reports. 2016 ; Vol. 6.
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