No.6（2011）7.Pore structure and adsorption properties of activated carbon prepared from herbaceous lignin

Takahiko Iida, Manami Nakaisi, Toshiya Hagiwara, Kouji Yamano, Kouji Yamano, Kensuke Kawarada

  In order to improve the recycling rate of herbaceous lignin byproducts produced in the straw pulp manufacturing process, activated carbon was prepared by the steam activation method from the lignin. In this study, we investigated the relation between the activated time and the pore structure or adsorption properties. The volume of micropore and mesopore increased in proportion to the activated time. As a result, the BET specific surface area and the adsorption properties increased with the growth of pore structure. The maximum value of BET specific surface area was 685m²/g and the amount of iodine adsorption was 730mg/g. Activated carbon prepared from herbaceous lignin contained ash. The ash’s principal ingredients were silicon dioxide(93%) and iron(3) oxide(3%) and the ash came from wheat straw which adsorbed those compounds from soil.

Keywords
Herbaceous lignin , Activated carbon , Adsorption property , Pore structure

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