A new route for conversion of corncob to porous carbon by hydrolysis and activation

作者：Ding Lili; Zou Bo; Liu Hequn; Li Yannan; Wang Zichen; Su Ying; Guo Yupeng^*; Wang Xiaofeng

来源：Chemical Engineering Journal, 2013, 225: 300-305.

DOI：10.1016/j.cej.2013.03.090

• Corncob
• Hydrolysis
• Conversion
• Activation
• Porous carbon

A new route for conversion of corncob to high performance porous carbon was proposed. This route involved hydrolysis of corncobs to dissolved sugars and degradation products of carbohydrates by sulfuric acid catalysis, transformation of the liquid hydrolyzate into solid hydrochar by dehydrating, polymerization and carbonization, fabrication of porous structures by activation. By using this route, high surface area (up to 3611 m(2)/g) and low ash content (0.51 wt%) were achieved. A cottony structure appeared on the surface of the porous carbon in a high KOH/hydrochar ratio. The specific capacitance for porous carbon was up to 236 F/g, which indicated the excellent electrochemical properties of these materials. Furthermore, the highly developed pore structures made the porous carbon possess potential applications in separation, catalysis, hydrogen storage and other fields.

• 出版日期2013-6-1
• 单位吉林大学; 长春工程学院