OPTIMIZATION OF SURFACE AREA OF ACTIVATED CARBONS PREPARED FROM COCONUT SHELLS BY RESPONSE SURFACE METHODOLOGY

Authors

  • G.O. Madojemu
  • C. B. Eze
  • F.E. Okieimen

Abstract

The use of activated carbon produced from some agricultural residues as adsorbent is greatly sought as a result of its adsorption capacity for the uptake of contaminants from waste streams. In this work, the effects of carbonization variables on the surface area of activated carbon prepared from coconut shells were investigated. The carbonization process variables considered and their range of values were temperature of (500-700 ) and duration of heating (60-180mins) using the central composite design of response surface methodology. The physico-chemical properties and the surface area of activated carbons were determined using standard analytical procedures. The range of values of the physico-chemical properties were; pH (7.08-7.34), moisture content (0.10-0.14%), ash content (2.70-3.80%), bulk density (0.42-0.53g.cm-3), pore volume (0.40-1.00cm3), particle density (1.25-2.5053g.cm-3) and surface area (459.66- 570.87m2.g-1). Carbonization temperature had significant effect on the surface area of activated carbon, while the effect of duration of heating was found to be insignificant. The optimum surface area of the activated carbon of 574.10m2.g-1 was obtained at a temperature of 700  and duration of heating of 112.23mins. A strong correlation was observed between the adjusted and predicted R2 values of 0.9478 and 0.8170 respectively which showed that there was a reasonable agreement between experimental and predicted values. Response surface methodology was found to be efficient technique for designing, analyzing and optimizing the carbonization process of preparing activated carbons from coconut shell biomass. Keywords: coconut shells, carbonization, activated carbon, surface area, optimization, RSM.

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Published

2020-04-07

How to Cite

Madojemu, G., Eze, C. B., & Okieimen, F. (2020). OPTIMIZATION OF SURFACE AREA OF ACTIVATED CARBONS PREPARED FROM COCONUT SHELLS BY RESPONSE SURFACE METHODOLOGY. Journal of Chemical Society of Nigeria, 45(2). Retrieved from http://journals.chemsociety.org.ng/index.php/jcsn/article/view/460

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