Journal of Siberian Federal University. Chemistry / The Study of Influence of Acid Catalysts Nature on the Composition of Products of Pine Wood Hemicelluloses Hydrolysis

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Issue
Journal of Siberian Federal University. Chemistry: 2018, Vol. 11, Issue 1
Authors
Yatsenkova, Olga V.; Skripnikov, Andrei M.; Kozlova, Svetlana A.; Ivanchenko, Natalia M.; Kuznetsov, Boris N.
Contact information
Yatsenkova, Olga V.:Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; ; Skripnikov, Andrei M.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; Kozlova, Svetlana A.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; ; Ivanchenko, Natalia M.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; Kuznetsov, Boris N.: Institute of Chemistry and Chemical Technology SB RAS Federal Research Center “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia
Keywords
pine wood; H2SO4, HCl catalysts; solid acid catalysts; hydrolysis; products; composition
Abstract

The processes of catalytic hydrolysis of hemicelluloses of pine wood at temperatures of 100-150 °C were studied. The dissolved mineral acids H2SO4 and HCl, as well as the solid acid catalysts Amberlyst–15, acid-modified SBA-15 and Sibunit-4 were used as the hydrolysis catalysts. It was established that the maximum yield of monosaccharides (96,0 % wt. from the initial content of hemicelluloses in pine wood) is achieved at temperature of 100 °C in the presence of catalyst 2 % wt. HCl with a hydrolysis time of 4 h. The yield is reduced in the series of catalysts: HCl (100 °C) > SBA–15 (150 °C) > Amberlyst–15 (150 °C) > H2SO4 (100 °C) > Sibunit–4 (150 °C) > without catalyst (150 °C). The lignocellulosic products formed during the hydrolysis of pine wood contain 51.0 – 55.5 % wt. of cellulose, 29.2 – 36.7 % wt. of lignin and 1.8 to 11.7 % wt. of hemicelluloses. The composition and structure of soluble and solid products of acid hydrolysis of pine wood are studied by gas chromatography, X-ray diffraction and chemical methods

Pages
42-55
Paper at repository of SibFU
http://elib.sfu-kras.ru/handle/2311/70989