KINETICS OF FIR WOOD OXIDATION BY OXYGEN IN AQUEOUS ALKALINE MEDIA

  • Ekaterina Petrovna Pervyshina Siberian Federal University
  • Nikolay Valerievich Tarabanko Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”
  • Valery Evgenievich Tarabanko Институт химии и химической технологии СО РАН, Федеральный исследовательский центр «Красноярский научный центр СО РАН»
  • Mikhail Yurievich Chernyak Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”
  • Konstantin Leonidovich Kaygorodov Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”
  • Yulia Vyacheslavovna Chelbina Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”
  • Dmitry Valentinovich Boyarchuk Siberian Federal University

Аннотация

Kinetics of fir wood oxidation (Abies sibirica) in aqueous alkaline media were studied by measuring oxygen consumption rates. Oxidation of extracted wood conforms to the kinetics of non-branching chain mechanism. The same mechanism governs the initial stage of non-extracted wood oxidation, but a transition to degenerate branching mode soon occurs. This transition is probably caused by softwood's low hemicelluloses content and high content of propyl guaiacol lignin units that are prone to condensation involving phenolic hydroxyls. This leads to quick depletion of phenolic and uronic carboxylic groups; chain initiation by oxidizing the respective anions becomes impossible, and degenerate branching takes the lead. It is assumed that inert hydrophobic fir extractives physically shield hydroperoxides responsible for degenerate branching from alkali. This prevents alkali from causing heterolytic hydroperoxide cleavage that does result in chain branching. It is assumed that the catalyst accelerates the reaction of homolytic cleavage of the aforementioned hydroperoxides

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Биографии авторов

Ekaterina Petrovna Pervyshina, Siberian Federal University
Candidate of Chemical Science
Nikolay Valerievich Tarabanko, Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”
Researcher in the Laboratory for Comprehensive Biomass Processing, Candidate of Chemical Science,
Valery Evgenievich Tarabanko, Институт химии и химической технологии СО РАН, Федеральный исследовательский центр «Красноярский научный центр СО РАН»
Head of the Laboratory for Comprehensive Biomass Processing, Doctor of Chemical Sciences, Professor
Mikhail Yurievich Chernyak, Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”
Senior Researcher in the Laboratory for Comprehensive Biomass Processing, Candidate of Chemical Science
Konstantin Leonidovich Kaygorodov, Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”
Junior Researcher in the Laboratory for Comprehensive Biomass Processing
Yulia Vyacheslavovna Chelbina, Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”
Junior Researcher in the Laboratory for Comprehensive Biomass Processing
Dmitry Valentinovich Boyarchuk, Siberian Federal University
Student

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Опубликован
2016-11-19
Как цитировать
[1]
Pervyshina, E.P., Tarabanko, N.V., Tarabanko, V.E., Chernyak, M.Y., Kaygorodov, K.L., Chelbina, Y.V. и Boyarchuk, D.V. 2016. KINETICS OF FIR WOOD OXIDATION BY OXYGEN IN AQUEOUS ALKALINE MEDIA. Химия растительного сырья. 4 (ноя. 2016), 57-63. DOI:https://doi.org/10.14258/jcprm.2016041582.
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