期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 35, 期 5, 页码 875-884出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2018.11.019
关键词
Porous carbon; Hydrothermal carbonization; KOH activation; CO2 adsorption
资金
- National Natural Science Foundation of China [U1760119, 51472160, U1560108]
- Shanghai Nature Science Foundation [16ZR1423400]
- Science and Technology Commission of Shanghai Municipality [15JC1490700, 16JC1402200]
Porous carbon materials were prepared by hydrothermal carbonization (HTC) and KOH activation of camphor leaves and camellia leaves. The morphology, pore structure, chemical properties and CO(2)capture ability of the porous carbon prepared from the two leaves were compared. The effect of HTC temperature on the structure and CO2 adsorption properties was especially investigated. It was found that HTC temperature had a major effect on the structure of the product and the ability to capture CO2. The porous carbon materials prepared from camellia leaves at the HTC temperature of 240 degrees C had the highest proportion of microporous structure, the largest specific surface area (up to 1823.77 m(2)/g) and the maximum CO2 adsorption capacity of 8.30 mmol/g at 25 degrees C under 0.4 MPa. For all prepared porous carbons, simulation results of isothermal adsorption model showed that Langmuir isotherm model described the adsorption equilibrium data better than Freundlich isotherm model. For porous carbons prepared from camphor leaves, pseudo-first order kinetic model was well fitted with the experimental data. However, for porous carbons prepared from camellia leaves, both pseudo-first and pseudo-second order kinetics model adsorption behaviors were present. The porous carbon materials prepared from tree leaves provided a feasible option for CO(2 )capture with low cost, environmental friendship and high capture capability. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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