Journal
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
Volume 23, Issue 5, Pages 1201-1209Publisher
SPRINGER
DOI: 10.1007/s10904-013-9910-1
Keywords
Eucalyptus sawdust; Orthogonal test; NaOH activation; Activated carbon; Pore structure
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Funding
- National Natural Science Foundation of China [21266002]
- Guangxi University
- Guangxi Education Department Education Reform in the 21st Century Research Fund of China [2011JGA010]
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology of China [11-C-01-01]
- Scientific Research Foundation of Guangxi University [XBZ110639]
- college students' innovative entrepreneurial training plan Guangxi autonomous region level Innovation training project [61]
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Eucalyptus sawdust was used as a precursor to prepare activated carbon using NaOH as a chemical activation agent. The effect of preparation conditions on the characteristics of the produced activated carbon used as an adsorbent was investigated. The performance of the activated carbon was characterized by N-2 adsorption-desorption isotherms, Brunauer-Emmett-Teller equation, Barett-Joyner-Halenda equation, scanning electron microscopy and Fourier transform infrared analysis. When the eucalyptus sawdust mass was 30.00 g, with particle sizes between 0.25 and 0.42 mm, and the sawdust was heated and charred before activation by NaOH, the optimized conditions for the preparation of activated carbon was found to be as follows: mass ratio of NaOH to eucalyptus sawdust, 1:2; activation time, 30 min; and activation temperature, 700 A degrees C. The Iodine number and BET surface area of the produced activated carbon was 899 and 1.12 x 10(3) m(2) g(-1), respectively, with a 13.3 % yield. Activated carbon exhibits adsorption isotherms of type IV. The total pore volume, micropore volume and average pore diameter were recorded as 0.636, 0.160 cm(3) g(-1) and 2.27 nm, respectively. The pore structure of the activated carbon is mainly mesoporous. Carbonyl and hydroxyl groups may also exist on the activated carbon surface.
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