Kinetic Study and Optimization of Catalytic Peroxide Delignification of Aspen Wood : сборник научных трудов

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1134/S0023158418010068

Ключевые слова: aspen wood, peroxide delignification, catalysts

Аннотация: It is established that the main regularities of the peroxide delignification of aspen wood in the temperature range of 70-100A degrees D<inverted exclamation=""> in the presence of dissolved (H2SO4) and solid (TiO2) catalysts are similar. With an increase of the temperature, the concentration of hydrogen peroxide and acetic acid, and the hydromodule (HM) values, as well as the duration of the process and the content of cellulose in the cellulose products, increase, while the content of the residual lignin decreases. Simultaneously, the total yield of cellulose products decreases independently of the nature of the catalyst. Delignification processes are satisfactory described by the first-order equation. A sufficiently high activation energy (88 kJ/mol in the presence of H2SO4 and 75 kJ/mol in the presence of TiO2) indicates the absence of significant external diffusion constraints in the selected conditions. The optimal conditions of obtaining cellulose products with a low content of residual lignin from aspen wood are found by the calculation methods. It is shown by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM) that the structure of cellulose products obtained corresponds to the structure of industrial microcrystalline cellulose. In the optimal conditions, a high-quality cellulose product can be obtained in mild conditions (the temperature is 100A degrees D<inverted exclamation="">, atmospheric pressure) by using a safer and technological TiO2 catalyst instead of a sulfuric acid catalyst.</inverted></inverted>

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Издание

Журнал: KINETICS AND CATALYSIS

Выпуск журнала: Vol. 59, Is. 1

Номера страниц: 48-57

ISSN журнала: 00231584

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Авторы

  • Kuznetsov B.N. (Russia Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Akad Gorodok 50-24, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Chesnokov N.V. (Russia Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Akad Gorodok 50-24, Krasnoyarsk 660036, Russia)
  • Garyntseva N.V. (Russia Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Akad Gorodok 50-24, Krasnoyarsk 660036, Russia)
  • Sudakova I.G. (Russia Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Akad Gorodok 50-24, Krasnoyarsk 660036, Russia)
  • Pestunov A.V. (Russia Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Akad Gorodok 50-24, Krasnoyarsk 660036, Russia)
  • D'yakovich L. (IRCELYON, F-69100 Lyon, France)
  • Pinel' K. (IRCELYON, F-69100 Lyon, France)

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