新型炭材料2017，Vol.32Issue(5)：451-459,9.DOI:10.1016/S1872-5805(17)60134-3
热解自活化法制备生物质基微孔型活性炭
Microporous activated carbons from coconut shells produced by self-activation using the pyrolysis gases produced from them, that have an excellent electric double layer performance
摘要
Abstract
Coconut shell-based activated carbons were prepared by self-activation using the pyrolysis gases generated from them. The process was carried out at high temperatures in a closed reactor filled with coconut shell under a high pressure that was generated by pyrolysis gases. Results indicate that the activated carbon prepared at 900℃ for 6 h has a specific surface area, total pore volume, micropore percentage, iodine adsorption capacity and methylene blue adsorption capacity of 1194. 4 m2/g, 0. 528 cm3/g, 87. 8%, 1280 mg/g and 315 mg/g, respectively. When used as the electrode material of electrochemical capacitors this activated carbon exhibits a specific capacitance of 258 F/g, a high capacitance retention rate of 97. 2% after 3000 charge/discharge cycles and a small imped-ance. The water vapor and carbon dioxide generated by the pyrolysis of the coconut shell in the closed reactor act as activating agents and also increase the pressure of the reaction system. This is favorable for the activation of the formed char. This self-activation meth-od was also used to prepare activated carbons with high adsorption capacities for iodine and methylene blue from almond stones, pecan shells and slash pine sawdust, indicating that it is a very simple, efficient, environmentally friendly and economical method for the preparation of biomass-based activated carbons for supercapacitor electrode materials and adsorption.关键词
生物质/微孔活性炭/热解自活化/电极材料/机理分析Key words
Biomass/Microspores activated carbon/Self-activation pyrolysis/Electrode material/Mechanism analysis分类
化学化工引用本文复制引用
孙康,冷昌宇,蒋剑春,卜权,林冠峰,卢辛成,朱光真..热解自活化法制备生物质基微孔型活性炭[J].新型炭材料,2017,32(5):451-459,9.基金项目
林业公益性行业专项(201404610) （201404610）
国家自然基金(31400510 ).:State Forestry Public Benefit Research Sector (201404610) （31400510 ）
Natural Science Foundation of China (31400510). （31400510）
