Title of article :
Preparation of activated carbon from autohydrolysed mixed southern hardwood
Author/Authors :
Yagmur، نويسنده , , Emine and Tunc، نويسنده , , Mehmet Sefik and Banford، نويسنده , , Anthony and Aktas، نويسنده , , Zeki، نويسنده ,
Pages :
9
From page :
470
To page :
478
Abstract :
Activated carbons have been prepared from raw mixed southern hardwood (MSH), extracted raw material (EF-MSH) and autohydrolysed extracted raw material (A-EF-MSH) precursors. The temperature of autohydrolysis ranged from 130 to 170 °C. The mixture of phosphoric acid and precursor primarily treated with microwave energy in a microwave oven was activated/carbonised in a rotary reactor at 450 °C under an inert nitrogen atmosphere. The activated carbons were characterised in terms of the surface area (BET) and pore volume. Extraction and autohydrolysis of the raw material resulted in a slight increase in the surface area and pore volume of the final product. The activated carbon prepared from the sample autohydrolysed at 150 °C gave the highest BET surface area and pore volume; 2143 m2/g and 1.474 cc/g, respectively. Autohydrolysis in this temperature range decreased the hemicellulose content of the sample. The mixed southern hardwood and solids obtained from its extraction and autohydrolysis are potential precursors to produce high quality activated carbons. Thermogravimetric analysis (TGA) revealed the raw, extract free and autohydrolysed samples mainly decomposed in the range 225–390 °C. However, TGA weight losses of the autohydrolysed precursors were lower than the raw and extract free samples in this temperature range.
Keywords :
Autohydrolysis , Hardwood , Phosphoric acid , Activated carbon , Chemical activation
Journal title :
Astroparticle Physics
Record number :
2036366
Link To Document :
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