Optimization of Chemical Activation Conditions for Activated Carbon From Coconut Shell Using Response Surface Methodology (RSM) and Its Ability to Adsorb CO₂

DOI

10.2991/aer.k.201229.032How to use a DOI?

Keywords

Adsorption, activated carbon, coconut shell, KOH activation, activation condition, Response Surface Methodology (RSM)

Abstract

Coconut shell was used as a precursor to prepare activated carbon using potassium hydroxide (KOH) as a chemical activating agent for carbon dioxide (CO2) adsorption at ambient conditions. The purpose of this study was to determine the optimum activation parameters of the activated carbon using Response Surface Methodology (RSM) to obtain high BET surface area. The factors and levels included were activation temperature (500-800 °C), impregnation ratio of KOH (1-3) and activation time (32-120 min). The Brunauer-Emmett-Teller (BET) surface area was selected as the response. ANOVA analysis was used to identify the most influential factor in experimental design response. Scanning electron microscopy (SEM), infrared spectroscopy (FTIR) and low angle X-ray diffractometer (XRD) were used to further characterized the activated carbon prepared under the optimum range of activation conditions. The CO2 adsorption of optimally prepared activated carbon at ambient conditions was observed. The optimum activation conditions for maximum porous development were; activation temperature 902. 27 °C, impregnation ratio 3.68 and activation time 54.32 min. Under these conditions, the predicted BET surface area was 2083.61 m2/g. As the R2 obtained from this model is 92.90%, it can be concluded that this model was reliable and the activated carbon from coconut shell impregnated with KOH is suitable for CO2 adsorption process as it can generate high BET surface area.

Copyright

© 2020, 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  - Nur Afiqah Anuwar
AU  - Putri Faizura Megat Khamaruddin
PY  - 2020
DA  - 2020/12/30
TI  - Optimization of Chemical Activation Conditions for Activated Carbon From Coconut Shell Using Response Surface Methodology (RSM) and Its Ability to Adsorb CO₂
BT  - Proceedings of the Third International Conference on Separation Technology 2020 (ICoST 2020)
PB  - Atlantis Press
SP  - 234
EP  - 248
SN  - 2352-5401
UR  - https://doi.org/10.2991/aer.k.201229.032
DO  - 10.2991/aer.k.201229.032
ID  - Anuwar2020
ER  -