Journal of Siberian Federal University. Chemistry / The Kinetic Investigation and Optimization of the Processes of Larch Arabinogalactane Hydrolysis in the Presence of Dissolved and Solid Acid Catalysts

Full text (.pdf)
Issue
Journal of Siberian Federal University. Chemistry. 2018 11 (2)
Authors
Yatsenkova, Olga V.; Skripnikov, Andrei M.; Kozlova, Svetlana A.; 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; Kuznetsov, Boris N.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia;
Keywords
H2SO4; HCl; SBA-15; larch arabinogalactan; catalysts; H2SO4; HCl; acid-modifi ed solid catalysts; hydrolysis; kinetics; optimization; conversion; arabinose; galactose
Abstract

The infl uence of the temperature and the reaction time of larch arabinogalactan (AG) hydrolysis in the presence of dissolved mineral acids H2SO4 and HCl, as well as solid acid catalysts Amberlyst 15, acid-modifi ed SBA-15 and Sibunit-4 on the rate of formation of arabinose and galactose was studied. The rate constants of monosaccharides formation are increased in the series of catalysts: Sibunit-4 (150 °C) < SBA-15 (150 °C) < Amberlyst 15 (150 °C) < 0,1M H2SO4 (130 °C) < 0,1M HCl (130 °C). The activation energy of the reaction of arabinose formation (65-91 kJ/mol) is lower than that of galactose (112-140 kJ /mol). The composition of soluble products of acid hydrolysis of arabinogalactan is studied by gas chromatography. The process of arabinogalactan hydrolysis in the presence of dissolved and solid acid catalysts was optimized by the calculation methods. The optimal parameters of processes at which a degree of arabinogalactan conversion close to 100 % are established

Pages
167-183
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/71613