Preparation of Bamboo-Based Activated Carbon and Its Application in Direct Carbon Fuel Cells

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• 作者：Jubing Zhang ; Zhaoping Zhong ; Dekui Shen ; Jinxiao Zhao ; Huiyan Zhang ; Min Yang ; Weiling Li
• 刊名：Energy & Fuels
• 出版年：2011
• 出版时间：May 19, 2011
• 年：2011
• 卷：25
• 期：5
• 页码：2187-2193
• 全文大小：937K
• 年卷期：v.25,no.5(May 19, 2011)
• ISSN：1520-5029

文摘

A biomass-based activated carbon, utilized for direct carbon fuel cells (DCFCs), is prepared from bamboo scraps under different activation temperatures, activation times, and impregnation ratios. The K₂CO₃ is employed as the activating agent, while the activated carbon is treated in HNO₃ solution for the purpose of surface modification and ash removal. The applicability of the prepared activated carbon for DCFCs is evaluated by a fluidized bed electrode direct carbon fuel cell anode. It is found that the BET surface area of the activated carbon could reach 1264 m² g^鈥? under the following conditions: activation temperature, 1173 K; activation time, 2 h; impregnation ratio, 1. The content and diversity of the surface oxygen functional groups of the activated carbon could be well improved through the HNO₃ treatment, and the ash content is notably reduced. Differently, the BET surface area is slightly reduced while the electrical resistivity is remarkably increased. The optimal HNO₃ solution concentration is estimated to be 2 mol L^鈥?, giving the treated bamboo-based activated carbon outstanding polarization performance among the tested carbon fuels.