Preparation and characterization of activated carbon from oil palm shells using H₃PO₄ as dehydrating agent

Ng, Chew Ban (2006) Preparation and characterization of activated carbon from oil palm shells using H₃PO₄ as dehydrating agent. Universiti Malaysia Sabah. (Unpublished)

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Abstract

The porosity and adsorption capacity in an activated carbon depended on the chemical activation, activation time and temperature as well as the surrounding condition. Porous carbons have been prepared from oil palm shells in different amount of chemical activator, activation time and temperature. The oil palm shells have undergone two stages activation, which is chemical activation before time and temperature activation process occurs. Results show that yield percentages as well as moisture and ash content will increase as impregnation ratio of phosphoric acid increase and activation time and temperature decrease. The SEM micrographs taken, proved the porosity of activated carbons generated as the activation temperature increases. FTIR spectra give the functional groups of activated carbons. Methylene blue adsorption gives the results for the comparison of different concentration and shaking time. Langmuir model indicates that 4.5 M H3P04 and 450°C are the optimum conditions for preparing good quality activated carbons and pseudo-second-order equation produces has the better result.

Item Type: Academic Exercise
Uncontrolled Keywords: adsorption capacity, porosity, temperature, activation time, chemical activation, oil palm shell, langmuir model, porous carbons
Subjects: T Technology > TD Environmental technology. Sanitary engineering
Divisions: SCHOOL > School of Science and Technology
Depositing User: MDM SITI AZIZAH IDRIS
Date Deposited: 20 May 2014 06:50
Last Modified: 13 Oct 2017 02:40
URI: http://eprints.ums.edu.my/id/eprint/8749

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