Adsorption of K~+ from an aqueous phase onto an activated carbon used as an electric double-layer capacitor electrode

被引:0
作者
LI Ying
机构
基金
高等学校博士学科点专项科研基金;
关键词
activated carbon; adsorption isotherm; adsorption kinetics; electric double-layer capacitor;
D O I
暂无
中图分类号
TM53 [电容器];
学科分类号
080801 ;
摘要
The adsorption capacity and absorption rate for electrolyte onto activated carbon are important parameters used to characterize activated carbon electric double-layer capacitor electrodes. In this paper the pore structure of typical commercial activated carbons, and various Mn-doped activated carbons prepared on a laboratory scale, are described. The pore structure was character-ized by N2 adsorption/desorption isotherms. Isotherms for K+ adsorption onto these activated carbons from the aqueous phase were also obtained. The experimental, equilibrium K+ adsorption data were fitted to the Langmuir, Freundlich or Temkin equations. Adsorption of K+ onto the activated carbons was measured and plotted as a function of time. The adsorption kinetic data were modeled by either pseudo-first or pseudo-second order equations. The Elvoich equation, a liquid film diffusion and an intra-particle diffusion model were used to fit the kinetic data. The results indicate that the adsorption of K+ onto activated carbon is influenced by many factors including pore size distribution, specific surface area and the surface chemistry of the activated carbons. The Temkin equation best describes the equilibrium adsorption data. The pseudo-second order model exactly describes the whole adsorption process, which is controlled by both liquid film and intra-particle diffusion.
引用
收藏
页码:551 / 556
页数:6
相关论文
共 15 条
[1]   电极用金属活性炭的催化制备与表征 [J].
李兰廷 ;
解强 ;
郝丽娜 ;
郑艳峰 ;
周铁桥 ;
邢雯雯 ;
王艳艳 .
中国矿业大学学报, 2008, (02) :225-230
[2]   多孔炭的孔结构与电化学性能的关系 [J].
赵家昌 ;
徐菁利 ;
陈思浩 ;
解晶莹 .
电池, 2008, (01) :17-20
[3]   污泥活性炭对染料的吸附动力学研究 [J].
岳钦艳 ;
解建坤 ;
高宝玉 ;
于慧 ;
岳文文 ;
张升晓 ;
王晓娜 .
环境科学学报, 2007, (09) :1431-1438
[4]   酚醛基活性炭纤维孔结构及其电化学性能研究 [J].
刘春玲 ;
文越华 ;
程杰 ;
郭全贵 ;
曹高萍 ;
刘朗 ;
杨裕生 .
物理化学学报, 2005, (07) :786-791
[5]   活性炭孔结构调节:理论、方法与实践 [J].
解强 ;
张香兰 ;
李兰廷 ;
金雷 .
新型炭材料, 2005, (02) :183-190
[6]   活性炭纤维制备双电层电容器 [J].
吴海芳 ;
胡中华 .
炭素技术, 2004, (01) :12-16
[7]   超电容器活性炭电极储电影响因素的研究 [J].
孟庆函 ;
刘玲 ;
宋怀河 ;
凌立成 .
电子元件与材料, 2003, (12) :1-3+6
[8]   双电层电容器用多孔炭材料的研究与开发 [J].
张琳 ;
刘洪波 ;
张红波 .
炭素, 2003, (04) :3-9
[9]   实用化超电容器的制备与电化学性能的研究 [J].
孟庆函 ;
刘玲 ;
凌立成 .
电子元件与材料, 2003, (09) :1-2+8
[10]   表面官能团对活性炭性能的影响附视频 [J].
庄新国 ;
杨裕生 ;
杨冬平 ;
嵇友菊 ;
唐致远 .
电池, 2003, (04) :199-202