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Chemistry and Industry of Forest Products ›› 2017, Vol. 37 ›› Issue (2): 49-56.doi: 10.3969/j.issn.0253-2417.2017.02.006

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Preparation and Properties of Formed Activated Carbon Coated by Ethyl Cellulose

XU Wei1, LIU Junli1, MIAO Cunbiao2, SUN Kang1, SONG Yaoguang1   

  1. 1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering, SAF;Key Lab. of Biomass Energy and Materials, Jiangsu Province, Nanjing 210042, China;
    2. Fujian Yuanli Active Carbon Co., Ltd., Nanping 353000, China
  • Received:2016-08-04 Online:2017-04-25 Published:2017-05-04

Abstract: The coated liquid was prepared with ethyl cellulose as coating material and ethanol as the solvent by dissolving at 50 ℃. In order to prepare activated carbon products coated by EC, the coated liquid was uniformly sprayed on the surface of formed activated carbon before heat treatment. The influences of the mass fraction of coated liquid, spray volume and heat treatment temperature on the strength and adsorption properties of coated activated carbon were studied. It was found that under the mass fraction of coated liquid was 4.23%, the weight of activated carbon was 30 g, the spray volume was 20 mL, and the heat treatment temperature was 140 ℃, the strength of the coated activated carbon reached 93.66% and increased 7.35 percentage points compared with that of raw activated carbon and the butane working capacity reached 86.0 g/L and decreased by 9.6 g/L, a thin film with thickness 3-4 μm was formed on the surface of the activated carbon. EC coating did not change the pore structure of activated carbon, but it would affect the wet ability of activated carbon surface, the water contact angle of coated activated carbon was 89.76°, which of the raw activated carbon was 15.41°, and it meant the hydrophobic performance was significantly improved. The surface of the activated carbon products prepared by this method was smooth, no dust, and the shape kept well.

Key words: formed activated carbon, surface coating, strength, water contact angle

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