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CO(2) Capture in the Sustainable Wheat-Derived Activated Microporous Carbon Compartments

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,...

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Autores principales: Hong, Seok-Min, Jang, Eunji, Dysart, Arthur D., Pol, Vilas G., Lee, Ki Bong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5048159/
https://www.ncbi.nlm.nih.gov/pubmed/27698448
http://dx.doi.org/10.1038/srep34590
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author Hong, Seok-Min
Jang, Eunji
Dysart, Arthur D.
Pol, Vilas G.
Lee, Ki Bong
author_facet Hong, Seok-Min
Jang, Eunji
Dysart, Arthur D.
Pol, Vilas G.
Lee, Ki Bong
author_sort Hong, Seok-Min
collection PubMed
description 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 pseudo-first-order model, the pseudo-second-order kinetic model described the experimental adsorption data methodically.
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spelling pubmed-50481592016-10-11 CO(2) Capture in the Sustainable Wheat-Derived Activated Microporous Carbon Compartments Hong, Seok-Min Jang, Eunji Dysart, Arthur D. Pol, Vilas G. Lee, Ki Bong Sci Rep Article 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 pseudo-first-order model, the pseudo-second-order kinetic model described the experimental adsorption data methodically. Nature Publishing Group 2016-10-04 /pmc/articles/PMC5048159/ /pubmed/27698448 http://dx.doi.org/10.1038/srep34590 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Hong, Seok-Min
Jang, Eunji
Dysart, Arthur D.
Pol, Vilas G.
Lee, Ki Bong
CO(2) Capture in the Sustainable Wheat-Derived Activated Microporous Carbon Compartments
title CO(2) Capture in the Sustainable Wheat-Derived Activated Microporous Carbon Compartments
title_full CO(2) Capture in the Sustainable Wheat-Derived Activated Microporous Carbon Compartments
title_fullStr CO(2) Capture in the Sustainable Wheat-Derived Activated Microporous Carbon Compartments
title_full_unstemmed CO(2) Capture in the Sustainable Wheat-Derived Activated Microporous Carbon Compartments
title_short CO(2) Capture in the Sustainable Wheat-Derived Activated Microporous Carbon Compartments
title_sort co(2) capture in the sustainable wheat-derived activated microporous carbon compartments
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5048159/
https://www.ncbi.nlm.nih.gov/pubmed/27698448
http://dx.doi.org/10.1038/srep34590
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