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

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep34590· OSTI ID:1363896
 [1];  [1];  [2];  [2];  [1]
  1. Korea Univ., Seoul (Republic of Korea)
  2. Purdue Univ., West Lafayette, IN (United States)

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.

Research Organization:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
EE0006832
OSTI ID:
1363896
Journal Information:
Scientific Reports, Vol. 6, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 81 works
Citation information provided by
Web of Science

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Cited By (7)

Facile One-Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO 2 Capture journal December 2017
New Green Adsorbent for Capturing Carbon Dioxide by Choline Chloride:Urea-Confined Nanoporous Silica journal January 2020
CO2 adsorption in hydrochar produced from waste biomass journal August 2019
A Universal Theoretical Framework in Material Characterization for Tailored Porous Surface Design journal June 2019
A facile synthesis tool of nanoporous carbon for promising H 2 , CO 2 , and CH 4 sorption capacity and selective gas separation journal January 2018
Nitrogen-doped microporous carbon with high CO 2 sorption by KOH activation of black gram journal September 2018
A single step process to synthesize ordered porous carbon from coconut shells-eggshells biowaste journal September 2019

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