东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (12): 1740-1744.DOI: 10.12068/j.issn.1005-3026.2016.12.015

• 材料与冶金 • 上一篇    下一篇

椰壳类活性炭高温改性及吸附铝电解质熔盐中K+的性能

侯剑峰， 王兆文， 李拓夫， 石忠宁   

  1. (东北大学 冶金学院， 辽宁 沈阳110819)
  • 收稿日期:2015-01-18 修回日期:2015-01-18 出版日期:2016-12-15 发布日期:2016-12-23
  • 通讯作者: 侯剑峰
  • 作者简介:侯剑峰(1979-)，男，辽宁沈阳人，东北大学博士研究生; 王兆文(1964-)，男，辽宁沈阳人，东北大学教授，博士生导师; 石忠宁(1975-)，男，广西都安人，东北大学教授，博士生导师.
  • 基金资助:
    国家科技支撑计划项目(2012BAE08B01)； 国家自然科学基金重点资助项目(51434005).

High Temperature Modification on Coconut Shell Activated Carbon and Adsorptivity of the Activated Carbon for K+ in Aluminum Electrolyte

HOU Jian-feng， WANG Zhao-wen， LI Tuo-fu， SHI Zhong-ning   

  1. School of Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2015-01-18 Revised:2015-01-18 Online:2016-12-15 Published:2016-12-23
  • Contact: WANG Zhao-wen
  • About author:-
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摘要： 利用SEM，ASAP2000M和FTIR对高温改性前后的椰壳活性炭的表面性能进行检测分析，并通过吸附铝电解质熔盐中K+的实验对吸附动力学过程进行分析，研究高温改性对活性炭表面性能的影响和高温改性后活性炭吸附熔盐中K+的性能.表面性能检测的分析结果表明，活性炭经过高温改性后比表面积由918m2/g提升至2544m2/g，表面孔径分布得到优化，并且具有去除表面杂质的作用；同时，高温改性前后活性炭的表面官能团种类没有发生明显变化，说明高温改性后的活性炭能够在铝电解质熔盐中保持稳定的结构.吸附实验数据的分析结果表明，活性炭在铝电解质熔盐中吸附K+的过程符合准二级动力学模型；并且，经35min后达到吸附平衡，K+最大吸附量为20.8mg/g.

关键词: 高温改性, 椰壳活性炭, 铝电解质, 钾离子, 吸附

Abstract: According to kinetic calculation of adsorption K+ using coconut activated carbon in molten aluminum electrolyte， the modification of the surface properties and the capacity of removing potassium (K+) using the high-temperature modified cocoanut activated carbon were studied， associated with the analysis of SEM， ASAP2000M and FTIR spectrometer. The results showed that the specific surface area changed from 918m2/g to 2544 m2/g after high-temperature modification and the pore size distribution of the adsorbent which exhibited the uniform mesopores were optimized. Meanwhile， the functional group species of activated carbon were not changed after high-temperature modification， which indicated that the structure of high-temperature modification activated carbon could keep stable in molten aluminum electrolyte. For the capacity of removing K+， it was found that the adsorption kinetics process could be described using the pseudo-second-order model and the adsorption equilibrium was reached after 35 minutes with the maximum adsorption capacity of K+ of 20.8mg/g.

Key words: high temperature modification, coconut activated carbon, aluminum electrolyte, potassium； adsorption

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