Granular Mesoporous Activated Carbons from Waste Tires by Cyclic Oxygen Chemisorption鈥揇esorption

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• 作者：Francisco Heras ; Noelia Alonso-Morales ; Diana Jimenez-Cordero ; Miguel A. Gilarranz ; Juan J. Rodriguez
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：February 15, 2012
• 年：2012
• 卷：51
• 期：6
• 页码：2609-2614
• 全文大小：269K
• 年卷期：v.51,no.6(February 15, 2012)
• ISSN：1520-5045

文摘

Activation upon cyclic oxygen chemisorption鈥揹esorption has proved to be an efficient way to develop porosity at low burn off from waste tires char. In this work the influence of particle size, desorption temperature, and the number of cycles is studied. Highest values of burnoff and specific surface area (S_BET) are obtained for the largest particle diameter (3 mm average) and at intermediate desorption temperature (650 掳C). In these conditions S_BET values around 500 m²/g can be achieved at burn-offs of about 30%, and close to 600 m²/g at around 45% burnoff, with a mean pore size of 10 nm and a micropore volume close to 0.08 cm³/g. Although the surface area is moderate, the low burnoff and high S_BET/burnoff ratio achieved make it possible to maintain initial granular morphology of the particles even after 20 cycles of activation.