活性炭微结构及其对丁酮吸附-脱附性能的影响

doi:10.3969/j.issn.0253-2417.2017.05.020

林产化学与工业 ›› 2017, Vol. 37 ›› Issue (5): 146-152.doi: 10.3969/j.issn.0253-2417.2017.05.020

• 研究报告 • 上一篇

活性炭微结构及其对丁酮吸附-脱附性能的影响

黄丽^1,2, 孙康^1,2, 朱光真^1,2, 刘石彩^1,2

1. 中国林业科学研究院林业新技术研究所, 北京 100091;
2. 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:2017-02-13 出版日期:2017-10-25 发布日期:2017-10-30
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:lshicai@sina.com。 E-mail:lshicai@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;E-mail:huangli1223@163.com
基金资助:
中国林科院林业新技术所基本科研业务费专项资金（CAFINT2014C09）

Effect of Adsorption and Desorption of Butanone on Micropore Structure of Activated Carbon

HUANG Li^1,2, SUN Kang^1,2, ZHU Guangzhen^1,2, LIU Shicai^1,2

1. Research Institute of Forestry New Technology, CAF, Beijing 100091, China;
2. 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:2017-02-13 Online:2017-10-25 Published:2017-10-30

摘要/Abstract

摘要： 为考察3种活性炭的微结构及其对丁酮吸附-脱附性能的影响，通过氮气吸附-脱附等温线表征活性炭的孔隙结构，采用红外光谱和Boehm滴定法表征活性炭表面的官能团，并在常压动态吸附装置中研究了不同温度条件下3种活性炭对丁酮的吸附及脱附性能。结果表明：活性炭对丁酮的吸附主要发生在微孔中，0.5~0.8 nm的微孔对丁酮的吸附有促进作用，1.2 nm左右的微孔对于丁酮的吸附有积极影响。活性炭表面羧基、内酯基等酸性基团的存在有利于丁酮的吸附。温度对活性炭吸附、脱附丁酮有显著影响。在吸附过程中，随着温度的升高，活性炭对丁酮的吸附量逐渐降低；在脱附过程中，脱附率随着温度的升高逐渐升高；内酯基和羧基的存在会减弱丁酮的脱附；同时发现，0.5~0.8 nm的微孔和直径为1.2 nm左右的微孔结构亦有利于活性炭对丁酮的脱附。

关键词: 活性炭, 丁酮, 吸附, 脱附

Abstract: Three kinds of activated carbons were chosen to be used on the study of effects of butanone on adsorption and desorption on pore structure of activated carbon.The experiment was conducted in an atmospheric dynamic adsorption reactor at different temperature conditions.The pore structures of activated carbons were characterized by N₂ adsorption isothermsm, the surface function groups of activated carbon was identified by FT-IR analysis and Boehm titration.The result shows that the adsorption process of butanone by activated carbon mainly happens on micropores,the pore size distribution from 0.5-0.8 nm promotes the adsorption of butanone and the distribution around 1.2 nm trend to enhance the adsorption of butanone.The acidic groups such as carboxyl and lactone groups are good for the adsorption of butanone.Temperature has significant effect on the adsorption of butanone by activated carbons.During the adsorption process, the amount of butanone adsorbed at equilibrium decreased with the increase of temperature;during the desorption process, the rate of desorption increased with the increase of temperature.Lactonic and carboxyl groups will suppress the desorption of butanone; at the same time, the micro-pore structure of 0.5-0.8 nm and mes-pore of 1.2 nm in diameter were also in favor of activated carbon on the desorption of butanone.

Key words: activated carbon, butanone, adsorption, desorption

中图分类号:

TQ35
TQ424

黄丽, 孙康, 朱光真, 刘石彩. 活性炭微结构及其对丁酮吸附-脱附性能的影响[J]. 林产化学与工业, 2017, 37(5): 146-152.

HUANG Li, SUN Kang, ZHU Guangzhen, LIU Shicai. Effect of Adsorption and Desorption of Butanone on Micropore Structure of Activated Carbon[J]. Chemistry and Industry of Forest Products, 2017, 37(5): 146-152.

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活性炭微结构及其对丁酮吸附-脱附性能的影响

Effect of Adsorption and Desorption of Butanone on Micropore Structure of Activated Carbon

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