Porous carbons from hydrothermal carbonization of corn stover for highly efficient CO2 capture

DOI

10.2991/iceesd-17.2017.92How to use a DOI?

Keywords

Corn stover; Activated carbon; CO2 capture; Hydrothermal carbonization; Agricultural waste; Biomass

Abstract

Sustainable biomass-derived carbon materials were produced by hydrothermal carbonization of corn stover that was followed by chemical activation with KOH. The prepared carbon materials were used for CO2 adsorption, and had a CO2 uptake of 7.14 mmol/g at a pressure of 1 bar and at 0 oC that was much higher than CO2 uptake by activated carbon that was prepared from direct activation of corn stover (2.78 mmol/g). The porous corn stover-derived carbonaceous material had high surface area (2442 m2/g) and large pore volume (1.55 cm3/g). Product yields obtained by activation of hydrothermally carbonized corn stover were significantly higher than that by the direct activation of corn stover (36-75% VS. 8%). The prepared corn stover-derived porous carbon had a high CO2/N2 selectivity of 15.5, and exhibited constant CO2 uptake for five successive reuse cycles. The hydrothermal carbonization step plays important role for producing porous carbons from biomass that have high and specific adsorption properties.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xinhua Qi
AU  - Yu Wang
AU  - Feng Shen
PY  - 2017/04
DA  - 2017/04
TI  - Porous carbons from hydrothermal carbonization of corn stover for highly efficient CO2 capture
BT  - Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)
PB  - Atlantis Press
SP  - 487
EP  - 495
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceesd-17.2017.92
DO  - 10.2991/iceesd-17.2017.92
ID  - Qi2017/04
ER  -