欢迎访问《生物质化学工程》,

生物质化学工程 ›› 2017, Vol. 51 ›› Issue (5): 29-35.doi: 10.3969/j.issn.1673-5854.2017.05.005

• 研究报告 • 上一篇    下一篇

活性炭对丁酮的吸附动力学研究

黄丽, 杨华, 孙康, 刘石彩   

  1. 中国林业科学研究院 林产化学工业研究所; 生物质化学利用国家工程实验室; 国家林业局林产化学工程重点开放性实验室; 江苏省生物质能源与材料重点实验室, 江苏 南京 210042
  • 收稿日期:2016-07-25 出版日期:2017-09-30 发布日期:2017-09-30
  • 通讯作者: 刘石彩,研究员,硕士生导师,主要从事生物质能源及活性炭研究;E-mail:lshiccai@sina.com。 E-mail:lshiccai@sina.com
  • 作者简介:黄丽(1991—),女,湖北黄冈人,硕士生,主要从事生物质炭材料的制备及应用研究
  • 基金资助:
    "十二五"国家科技支撑计划资助(2015BAD14B06);国家自然科学基金资助项目(31400510)

Kinetics of Butanone Adsorption on Activated Carbon

HUANG Li, YANG Hua, SUN Kang, LIU Shicai   

  1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key and Open Lab. of Forest Chemical Engineering, SFA; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
  • Received:2016-07-25 Online:2017-09-30 Published:2017-09-30

摘要: 研究了2种活性炭(木质活性炭和煤质活性炭)对丁酮的吸附,重点考察了活性炭的吸附时间、吸附温度和丁酮载气流量对丁酮吸附的影响,并用准一级、准二级、Elovich和Bangham 4种动力学模型对活性炭在不同温度条件下对丁酮的吸附行为进行了动力学拟合,确定其动力学吸附模型。实验表明:不同的活性炭对丁酮的吸附过程不同;活性炭对丁酮的吸附是一个吸附和解吸同时存在的过程,当吸附速率和解吸速率相等时,该过程达到吸附平衡;随着吸附温度的升高,活性炭对丁酮的饱和吸附量逐渐降低,说明活性炭对丁酮的吸附过程为放热反应;丁酮载气流量对活性炭吸附丁酮达到饱和的时间以及吸附速率有影响,对AC-1的最终饱和吸附量影响显著,对AC-2的最终饱和吸附量没有显著影响。这2种活性炭吸附丁酮最适宜的吸附温度均为303 K,最佳的载气流量为400 mL/min。在不同温度下对活性炭吸附丁酮的过程进行动力学分析,发现Bangham方程计算得到的相关系数R2大于0.99,因此,活性炭对丁酮的吸附动力学方程符合Bangham动力学方程。

关键词: 活性炭, 丁酮, 吸附动力学

Abstract: Two kinds of activated carbons(wooden activated carbon and coaly activated carbon) were used to study the butanone adsorption. The effects of adsorption time, adsorption temperature and the carrier gas flow of butanone on the adsorption performance were discussed. The adsorption kinetics at different temperatures were studied. Equilibrium data were analyzed by four kinetic models which were pseudo-first-order kinetic model, pseudo-second-order kinetic model, Elovich kinetic model and Bangham kinetic model, thus the kinetic model on the butanone adsorption was established. The results showed that the different kinds of activated carbons showed different adsorption performance. Meanwhile, the adsorption and desorption happened at the same time during the process of butanone adsorption on activated carbon. When the adsorption rate equaled the desorption rate, the equilibrium was established. The equilibrium adsorption amount of butanone decreased with the increase of temperature, which also indicated that the butanone adsorption on activated carbon was an exothermic reaction. The carrier gas flow influenced the adsorption time and rate, and the saturated adsorption amount of butanone of AC-1 was influenced and that of AC-2 was not. The optimal adsorption temperature was 303 K and the ideal carrier gas flow was 400 mL/min. It was also found that the R2 of Bangham model was more than 0.99, therefore it could be concluded that the adsorption of butanone on activated carbon followed Bangham kinetic model.

Key words: activated carbon, butanone, adsorption kinetics

中图分类号: