Adsorption of Methanol and Toluene onto Activated Carbon with Acid-Base Modified

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Abstract The activated carbon was modified with nitric acid and sodium hydroxide respectively, and the physicochemical properties of the activated carbon were characterized by specific surface area and pore size analyzer (BET), scanning electron microscope (SEM) and Boehm titration. The adsorption performance of modified activated carbon for methanol and toluene was tested. The results show that the specific surface area, total pore volume and micro-pore volume of activated carbon modified by acid and alkali are increased. The number of acidic groups on the surface is increased after acid-modification, and after the alkali modification, the activated carbon acid groups are reduced. The adsorption capacity of methanol and toluene is decreased for acid-modified activated carbon, and for the alkali-modified activated carbon, the adsorption capacity is improved to varying degrees. For single-component adsorption experiments, the slope of methanol breakthrough curve is greater than that of toluene and the breakthrough time is earlier than that of toluene. In the process of multi-component adsorption, replacement adsorption of toluene to methanol occurs, so that the adsorbed methanol is desorbed.

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	Articles by authors
	Pang Weiliang
	Hu Baisong
	Cheng Dandan
	Xing Guozheng
	Feng Lixia
	Wei Zheng

Keywords： activated carbon； modified； adsorbed； methanol； toluene

Received 2018-02-09;

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Pang Weiliang, Hu Baisong, Cheng Dandan, Xing Guozheng, Feng Lixia, Wei Zheng.Adsorption of Methanol and Toluene onto Activated Carbon with Acid-Base Modified[J] Chemcial Industry and Engineering, 2018,V35(6): 48-53

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