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›› 2008, Vol. 42 ›› Issue (5): 30-32.

• 研究报告 • Previous Articles     Next Articles

Study on Activated Carbons from the Coniferous Wood in the South China and the Broad-leaved Wood in the North China by ZnCl2 Activation

GONG Jian-ping1, LIN Mu-sen2, ZHANG Yan-ping1   

  1. 1. Institute of Chemical Industry of Forest Products, CAF;Key and Open Lab.on Forest Chemical Engineering, SFA, Nanjing 210042, China;2. Nanjing College of Chemical Technology, Nanjing 210048, China
  • Received:2007-05-08 Revised:1900-01-01 Online:2008-09-30 Published:2008-09-30

Abstract: Activated carbons were prepared from the coniferous wood in the South China (China fir and mason pine) and the broad-leaved wood in the North China (paulownia and polar), respectively, using zinc chloride as activating agent. The Baume degree of zinc chloride is 45, 48, 53 for impregnation. The end activation temperature is 650℃.The activated time is 2 h. The adsorption capacity of the resultant activated carbons was analyzed by measuring methylene blue decolorization, caramel adsorption, iodine adsorption value, xylose decolorization, lactic acid decolorization, cystine decolorization and DOP decolorization. Yield and ash content were also analyzed . The activated carbons prepared from the South China woods have the rich macropores, the strong absorbtion ability to large coloring matter molecules,high yield and low ash content.The activated carbons prepared from the North China woods have the rich mircopores, the strong absorbtion ability to small coloring matter molecules,low yield and high ash content. Since the activated carbons made from coniferous wood in South China and the broad-leaved wood in North China have great differences in decoloring ability, their preparing process should be different.

Key words: coniferous wood, broad-leaved wood, zinc chloride, activated carbon

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