Detailed Structural Analyses of KOH Activated Carbon from Waste Coffee Beans
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概要
- 論文の詳細を見る
The relationship of the detailed structural change of KOH activated carbon and hydrogen storage ability was investigated in activated carbon materials fabricated from waste coffee beans. The specific surface area of porous carbon materials calculated from N2 adsorption isotherms stood at 2070 m2/g when the weight ratio of KOH to carbon materials was $5:1$, and pore size was in the range of approximately 0.6 to 1.1 nm as micropores. In the structural analysis, X-ray diffraction analysis and Raman spectroscopy indicated structural change in these carbon materials through KOH activation. The order of the graphite structure changed to a smaller scale with this activation. It is theorized that specific surface area increased using micropores provided by carbon materials developed from the descent of the graphite structure. Hydrogen storage ability improved with these structural changes, and reached 0.6 wt % at 2070 m2/g. These results suggest that hydrogen storage ability is conferred by the chemical effect on graphite of carbon materials.
- 2009-11-25
著者
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Saitoh Hidetoshi
Department Of Bioresource Science Obihiro University Of Agriculture And Veterinary Medicine
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Ono Hiroki
Department Of Cardiovascular Medicine Kitakyushu Municipal Medical Center
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Ohshio Shigeo
Department Of Chemistry Nagaoka University Of Technology
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Akasaka Hiroki
Department Of Chemistry Nagaoka University Of Technology
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Himeno Syuji
Department of Civil and Environmental Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
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Takahata Tomokazu
Department of Materials Science and Technology, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
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Toda Ikumi
Department of Materials Science and Technology, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
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Kokubu Toshinori
Department of Chemical Science and Engineering, Miyakonojo National College of Technology, Miyakonojo, Miyazaki 885-8567, Japan
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Ono Hiroki
Department of Materials Science and Technology, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
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Akasaka Hiroki
Department of Materials Science and Technology, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
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