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

Abstract

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

CLC Number:

TQ35
TQ424

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

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