物理化学学报 >> 2001, Vol. 17 >> Issue (07): 594-599.doi: 10.3866/PKU.WHXB20010704

研究论文 上一篇    下一篇

PAN基活性炭纤维的氮吸附研究

刘振宇;郑经堂;王茂章;张碧江   

  1. 中国科学院山西煤炭化学研究所,太原 030001
  • 收稿日期:2000-11-13 修回日期:2001-02-26 发布日期:2001-07-15
  • 通讯作者: 刘振宇 E-mail:zyryu@sxicc.ac.cn

Study for Nitrogen Adsorption of PAN-based Activated Carbon Fibers

Liu Zhen-Yu;Zheng Jing-Tang;Wang Mao-Zhang;Zhang Bi-Jiang   

  1. Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001
  • Received:2000-11-13 Revised:2001-02-26 Published:2001-07-15
  • Contact: Liu Zhen-Yu E-mail:zyryu@sxicc.ac.cn

摘要: 用相同原料不同活化方法制备聚丙烯腈基活性炭纤维,并对其进行了氮吸附研究.结 果表明,由不同活化方法所制备的活性炭纤维的孔结构存在较大差异,并对随着活化程度的 改变其孔结构的发展进行了研究.结果表明,通过简单的改变活化方法即可以制得不同孔隙占 主导地位的炭质吸附剂;也揭示出,不同的活化方法其活化机理有所差别.

关键词: 微孔, 比表面积, 孔径分布, 活性炭纤维, 氮吸附, 孔隙发展

Abstract: Polyacrylonitrile(PAN)-based activated carbon fibers (ACFs) prep ared by different activation methods were characterized using low-temperature nitrogen adsorption over a wid e relative pressure from 10-6 to 1. With the aid of nitrogen adsorption, the po re structure parameters and pore size distribution were calculated using differe nt models. By these analyses,the pore development and the dominant pores of samp les prepared by various activation methods could be clearly observed. For steam -activated series of samples, with increasing activation the values of specific surface area increase and the pores are gradually widened. The dominant pores c hange from micropores to mesopores and some macropores are developed when the de gree of activation is very high. For air-activated series of samples, only the ultramicropores are developed seriously. The dominant pores can be thought to be ultramicropore. For KOH-activated series of samples, the dominant pores can be thought to be supermicropores. Moreover, the adsorption measurement could provi de profound insight into the structural heterogeneity of the ACFs.

Key words: Microporosity, Surface area, Pore size distribution, Activated car bon fiber, Nitrogen adsorption measurement, Pore development