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Korean Carbon Society (한국탄소학회)
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Role of KOH in the One-Stage KOH Activation of Cellulosic Biomass

  • Oh, Gyu-Hwan (Enviro-Polymers Design Laboratory, Hyperstructured Organic Materials Research Center (HOMRC) and School of Materials Science and Engineering, Seoul National University) ;
  • Yun, Chang-Hun (Hyperstructured Organic Materials Research Center (HOMRC) and School of Applied Chemistry and Chemical Engineering, Sungkyunkwan University) ;
  • Park, Chong-Rae (Enviro-Polymers Design Laboratory, Hyperstructured Organic Materials Research Center (HOMRC) and School of Materials Science and Engineering, Seoul National University)
  • Received : 2003.12.01
  • Accepted : 2003.12.17
  • Published : 2003.12.30
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Abstract

The role of KOH in the one-stage KOH-activation of rice straws was studied using FTIR, XPS, TGA, and DTG techniques. It was found that at the impregnation, KOH extracts to some extent the lignin component from rice straw and reacts with hydroxyl groups. On heat-treatment, the impregnated KOH facilitates intermolecular condensation reaction on one hand but retards the thermal degradation of cellulose molecules on the other hand. The oxygen-containing surface functional groups newly created by oxidation of KOH may facilitate the bulk, not controlled, consumption of carbon atoms so that the effective porosities may not be able to be developed by the one-stage activation process.

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