Short-Time Preparation of NaOH-Activated Carbon from Sugar Cane Bagasse Using Microwave Plasma Heating

K. Konno, Y. Oike, Yasutaka Ohba, Osamu Sasaki, Y. Takiguchi, K. Onoe, Tatsuaki Yamaguchi
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引用次数: 5

Abstract

The microwave induced argon plasma was applied to the preparation of NaOH-activated carbon from sugar cane bagasse. The distinguished feature of the heating technique with this cold plasma is the short operation time. The carbonization and the activation process were finalized in one step within 3 min. The prepared activated carbon with NaOH ratio 3 to bagasse characterized using N2 adsorption of type IV (IUPAC classification) to give specific surface area of 1980 m2/g and mesopore volume of 0.73 ml/g. It also showed a higher specific capacitance of 201 F/g in 1 M H2SO4 solution (with standard three electrodes) than the corresponding one by the conventional heating, previously reported. The other features were the absence of oxygen groups and the presence of carbon centered stable radicals, detected by ESR spectra, on the surface.
微波等离子体加热蔗渣短时间制备氢氧化钠活性炭
采用微波诱导氩等离子体法制备蔗渣naoh活性炭。这种冷等离子体加热技术的显著特点是操作时间短。炭化和活化过程在3 min内一步完成。制备的NaOH比为3与甘蔗渣的活性炭采用ⅳ型N2吸附(IUPAC分级)表征,比表面积为1980 m2/g,介孔体积为0.73 ml/g。在1 M H2SO4溶液中(标准三电极),比电容为201 F/g,高于传统加热方法。其他特征是表面没有氧基团和碳中心稳定自由基的存在,通过ESR光谱检测到。
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