Kinetic study of aspen-wood sawdust delignification by H2O2 with sulfuric acid catalyst under mild conditions | Научно-инновационный портал СФУ

Kinetic study of aspen-wood sawdust delignification by H2O2 with sulfuric acid catalyst under mild conditions

Тип публикации: статья из журнала

Год издания: 2013

Идентификатор DOI: 10.1007/s11144-013-0601-2

Ключевые слова: Aspen-wood, Oxidative delignification, Sulfuric acid catalyst, Kinetics, Cellulose, Structure, First order equations, Kinetic study, Micro-crystalline cellulose, Optimal process, Pure cellulose, Residual lignins, Role of diffusion, Activation energy, Atmospheric pressure, Delignification, Enzyme kinetics, Rate constants, Structure (composition), Sulfuric acid, Wood, Barometric Pressure, Catalysts, Populus

Аннотация: The process of aspen-wood delignification in the medium "hydrogen peroxide-acetic acid-water-sulfuric acid catalysts" at mild conditions (temperature 70-100 A degrees C, atmospheric pressure) is described by the first order equation. Rate constants vary from 0.25 x 10(-4) (70 A degrees C) to 2.5 x 10(-4) s(-1) (100 A degrees C). The activation energy of aspen-wood delignification is near 91 kJ mol(-1). The rather high value of activation energy points to the insignificant role of diffusion limitations at used conditions of aspen-wood delignification. The optimal process conditions for obtaining of the pure cellulose (residual lignin content less 1 wt%) with a yield near 45 wt% were selected. Obtained cellulose has the structure similar to the commercial microcrystalline cellulose.

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Издание

Журнал: REACTION KINETICS MECHANISMS AND CATALYSIS

Выпуск журнала: Vol. 110, Is. 2

Номера страниц: 271-280

ISSN журнала: 18785190

Место издания: DORDRECHT

Издатель: SPRINGER

Авторы

  • Kuznetsov B.N. (Siberian Federal University)
  • Sudakova I.G. (Institute of Chemistry and Chemical Technology SB RAS)
  • Garyntseva N.V. (Institute of Chemistry and Chemical Technology SB RAS)
  • Djakovitch L. (IRCELYON)
  • Pinel C. (IRCELYON)

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