Preparation of activated carbons by utilizing solid wastes from palm oil processing mills |
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| Authors: | Jia Guo Ben Gui Shou-xin Xiang Xiu-ting Bao Hu-ji Zhang Aik Chong Lua |
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| Affiliation: | (1) Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, School of Chemical and Pharmaceutical Engineering, Wuhan Institute of Technology, Wuhan, 430073, P.R. China;(2) Division of Thermal and Fluid Engineering, Nanyang Technological University, Singapore, 639798, Republic of Singapore |
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| Abstract: | Feasibility of producing activated carbons by utilizing solid wastes (extracted flesh fibre and seed shell) from palm oil
processing mills was investigated. The effects of activation conditions (CO2 flow rate, activation temperature and retention time) on the characteristics of the activated carbons, i.e. density, porosity,
BET surface area, pore size distribution and surface chemistry were studied. In this study, the optimum conditions for activation
were an activation temperature of 800 °C and a retention time of 30 min for fiber or 50 min for shell, which gave the maximum
BET surface area. Pore size distribution revealed that the shell-based activated carbons were predominantly microporous whilst
fiber activated carbon had predominant mesopores and macropores, suggesting the application of shell and fiber activated carbon
as adsorbents for gas-phase and liquid-phase adsorption, respectively. This was confirmed by further gas- and liquid-phase
adsorption tests. |
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| Keywords: | Oil palm solid waste Activated carbon CO2 activation Pore structure Surface chemistry Adsorption |
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