Preparation and characterization of mesoporous activated carbon from waste tires |
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Authors: | P Ariyadejwanich W Tanthapanichakoon S.R Mukai |
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Affiliation: | a Department of Chemical Engineering, Chulalongkorn University, Bangkok 10330, Thailand b Department of Chemical Engineering, Kyoto University, Kyoto 606-8501, Japan |
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Abstract: | Activated carbons were produced from waste tires and their characteristics were investigated. Rubber separated from waste tires was first carbonized at 500 °C in N2 atmosphere. Next, the obtained chars were activated with steam at 850 °C. As a result, fairly mesoporous activated carbons with mesopore volumes and BET surface areas up to 1.09 cm3/g and 737 m2/g, respectively, were obtained. To further improve the porous properties of the activated carbons, the char was treated with 1 M HCl at room temperature for 1 day prior to steam activation. This treatment increased mesopore volumes and BET surface areas of the activated carbons up to 1.62 cm3/g and 1119 m2/g, respectively. Furthermore, adsorption characteristics of phenol and a dye, Black 5, on the activated carbon prepared via acid treatment were compared with those of a commercial activated carbon in the liquid phase. Although the prepared carbon had a larger micropore volume than the commercial carbon, it showed a slightly lower phenol adsorption capacity. On the other hand, the prepared carbon showed an obviously larger dye adsorption capacity than the commercial carbon, because of its larger mesopore volume. |
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Keywords: | Activated carbon Activation Adsorption Porosity |
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