CO2 derived nanoporous carbons for carbon capture

Liu, Shuhe and Jin, Yonggang and Bae, Jun-Seok and Chen, Zhigang ORCID: https://orcid.org/0000-0002-9309-7993 and Dong, Peng and Zhao, Shuchun and Li, Ruyan (2020) CO2 derived nanoporous carbons for carbon capture. Microporous and Mesoporous Materials, 305:110356. pp. 1-7. ISSN 1387-1811


Abstract

Nanoporous carbons (NPCs) were synthesized from CO2 with magnesiothermic reduction for CO2 capture applications. The yield of NPCs was enhanced by a modified magnesiothermic reduction process, in which CO2 instead of Ar was applied to the reactor during heating Mg powders from 500 °C to a given reaction temperature (800–900 °C). The yields, microstructures, pore structures and CO2 adsorption properties were investigated for a variety of NPCs synthesized under various conditions of reaction temperature and duration (15–60 min). The results show that the synthesized NPCs are mainly mesoporous and composed of well crystalline carbon nanosheets interwoven with amorphous carbon. The yield, BET surface area, total pore volume, narrow microporosity (pore size < 1 nm) and CO2 adsorption capacity were decreased with an increase of reaction temperature and duration. The highest CO2 uptake of 39.7 mg g−1 at 273 K and 1 bar was obtained in the NPC that was synthesized at 800 °C for 15 min and with flowing CO2 during heating at above 500 °C. The high CO2 adsorption capacity is resulted from its large surface area and volume of narrow micropores smaller than 1 nm, being of 34.9 m2 g−1 and 0.011 cm³ g−1, respectively.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 17 Jun 2022 01:13
Last Modified: 20 Jun 2022 00:20
Uncontrolled Keywords: Porous carbon, Carbon dioxide, Magnesiothermic reduction, CO2 capture, Adsorption
Fields of Research (2008): 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030399 Macromolecular and Materials Chemistry not elsewhere classified
Fields of Research (2020): 34 CHEMICAL SCIENCES > 3403 Macromolecular and materials chemistry > 340399 Macromolecular and materials chemistry not elsewhere classified
Identification Number or DOI: https://doi.org/10.1016/j.micromeso.2020.110356
URI: http://eprints.usq.edu.au/id/eprint/49126

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