A comparative kinetic study of acidic hemicellulose hydrolysis in corn cob and sunflower seed hull

Eken-Saracoglu N., Mutlu S. F., Dilmac G., Cavusoglu H.

BIORESOURCE TECHNOLOGY, cilt.65, sa.1-2, ss.29-33, 1998 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 65 Sayı: 1-2
  • Basım Tarihi: 1998
  • Doi Numarası: 10.1016/s0960-8524(98)00032-7
  • Dergi Adı: BIORESOURCE TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.29-33
  • Anahtar Kelimeler: corn cob, sunflower seed hull, kinetics of hydrolysis, hemicellulose hydrolysis, xylose
  • Gazi Üniversitesi Adresli: Evet

Özet

The kinetics of dilute acid catalyzed hemicellulose hydrolysis in corn cob and sunflower seed hull was investigated with sulfuric acid concentrations of between 0.2 and 1 N at temperatures of 98-130 degrees C. Batch hydrolysis data for two different lignosellulosic biomasses were correlated with a general kinetic model which assumed that hemicellulose was composed of two fractions with each fraction reacting according to first-order rates. When the concept of fast- and slowly-hydrolyzing hemicellulose was combined with a first-order-rate model for xylose degradation a complete kinetic model was developed. The respective rate constants were determined as functions of temperature and sulfuric acid concentration by a non-linear regression analysis. The results indicated that the kinetic parameters involved in hydrolysis reactions were dependent on substrate material. The experimental and model results were in a satisfactory agreement (C) 1998 Elsevier Science Ltd. All rights reserved.