The Study of Influence of Acid Catalysts Nature on the Composition of Products of Pine Wood Hemicelluloses Hydrolysis

Full text (.pdf)
Issue
Химия. Chemistry. 2018 11 (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