Effect of Activation Processes on Pore Structure of Activated Carbon Fibers Prepared from Liquefied Wood

摘要：

　　The liquefied wooden activated carbon fibers were prepared by liquefied wood through stream activation treatment.The effects of different activation process on the pore structure were studied by nitrogen adsorption-desorption isotherms,including the factors of the activation temperature,stream flow rate,activation time and heating rate.Results show that liquefied wooden activated carbon fibers are highly micropores.The liquefied wooden activated carbon fibers,which were prepared at a higher temperature,larger stream flow rate and longer activation time,have the higher specific surface area,larger pore volume,wider micropore width and more mesopores.When the heating rate is quickened,the specific surface area (SBET and Smeso) and pore volume (Vtotal,Vmicro and Vmeso) of liquefied wooden activated carbon fibers increase.Only the Smicro increases and then decreases when the heating rate is risen from 2℃/min to 4℃/min.The effect of activation temperature on pore structure is the most marked for the different activation processes,comparing with the stream flow rate,activation time and heating rate.The fractal dimensions values of all liquefied wooden activated carbon fibers are near to 3,indicating the surface of samples much rougher.The different processes treatment had little effect on the fractal dimensions.Moreover,the higher the ratio of micropores,the larger the value of fractal dimensions is,the rougher the surface of samples is.

关键词： Wood Activation Carbon Fiber Pore Structure Activation Temperature Stream Flow Rate Activation Time Heating Rate

作者: Liu Wenjing Zhao Guangjie

作者单位: College of Material Science and Technology,Beijing 100083,China

会议类型: 国际会议

会议名称: The tenth China-Japan joint conference on Composite Materials (第10届中日复合材料学术会议(CJJCC-10))

会议地点: 成都

会议语种:英文

页码: 510-518

在线出版日期: 2012-09-08（万方平台首次上网日期，不代表论文的发表时间）