Destruction of Lignin during the Ozonation of Pine Wood

Mamleeva, N.A.; Babayeva, N.A.; Kharlanov, A.N.; Lunin, V.V.

Авторы: Mamleeva N.A., Babayeva N.A., Kharlanov A.N., Lunin V.V.
Журнал: Russian Journal of Physical Chemistry A
Том: 93
Номер: 1
Год издания: 2019
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 37
Последняя страница: 42
DOI: 10.1134/S0036024419010199
Аннотация: The consumption of ozone by pine wood with a water content of 7 to 85% is investigated. The specific ozone consumption and degree of ozone transformation during the ozonation of wood with differentcontents of water are determined. IR absorption spectra of ozonated lignocellulosic material (LCM) produced from wood were analyzed. Destruction of the lignin aromatic structure and the formation of carbonyland carboxyl-containing compounds are observed. The content of cellulose in a sample of ozonated LCM grows along with the specific ozone consumption. Products of the ozonolysis of lignin (glyoxylic, formic, and oxalic acids) form during ozonation of the wood, as determined via HPLC. It is shown that the oxidation of acids by ozone proceeds in the water phase of the sample. Based on the data for the destruction of lignin and the results from investigating the process of wood ozonation, it is concluded that the optimum content of water for treating wood is 60–63%. It was shown that the destruction of lignin during wood ozonation proceeds via ozonolysis and with the participation of radicals formed in the reaction between ozone and water. Keywords: pine wood, ozonation, delignification, products of ozonation
Добавил в систему: Харланов Андрей Николаевич

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