YAO Xin;YANG Qian;ZHAO Xuesong;YE Pengtao;WANG Shuaishuai;QIU Lijun;

• 1:School of Chemistry and Chemical Engineering
• 2:Hefei University of Technology

Abstract：

In order to adjust the pore structure of coal-based granular activated carbon,a series of activated carbon samples were prepared by briquetting method with Datong bituminous coal and Lingwu bituminous coal as raw materials,using FeCl_3 as the additive.The effects of different Fe introducing methods including mixing,impregnation and ion exchange on the porosity and the magnetic properties of AC samples were investigated.The carbonization process of coal samples and the activation process of carbonized materials were simulated by thermogravimetric analysis.The microcrystalline structure and mineral composition of the carbonized material samples were analyzed by X-ray diffraction.The pore structure and magnetic properties of AC samples were respectively characterized by N2 adsorption-desorption isotherms and vibrating sample magnetometer.The results show that the weight loss rate of coal samples increases before 350 ℃ and decreases between 350 ℃ and 600 ℃ after Fe is introduced into the coal by mixing method and impregnation method. And the graphitization degree of carbonized materials decreases,the gasification reactivity increases,and the specific surface area of activated carbon increases.The BET specific surface area of Datong coal-based activated carbon prepared through Fe-impregnation increases from 672.4 m~2/g to 704.6 m~2/g and the value for Lingwu samples increases from 498.9 m~2/g to 774.1 m~2/g.The magnetic properties of activated carbon samples can be significantly enhanced by mixing method and impregnation method.After Fe is introduced by mixing method,the saturation magnetization of Datong activated carbon and Lingwu activated carbon increases from 1.343 0 emu/g and 2.639 9 emu/g to 4.417 5 emu/g and 9.146 5 emu/g,respectively.Because of the weak ion exchange capacity of the raw coals,Fe is not introduced by ion exchange method.On the contrary,the content of Ca and Fe series primary minerals in raw coal is reduced due to the acidity of the solution,and the pore structure development of activated carbon is limited.

Key Words： activated carbon;pore structure;briquetting;catalytic activation;magnetic property

Abstract:

Keywords:

Foundation: 中央高校基本科研业务费资助项目(JZ2017HGTA0227);; 省级大学生创新创业训练计划项目(2018CXCYS302)

Authors: YAO Xin;YANG Qian;ZHAO Xuesong;YE Pengtao;WANG Shuaishuai;QIU Lijun;

DOI: 10.13226/j.issn.1006-6772.19032503

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