Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.3390/molecules27248756

Ключевые слова: arabinogalactan, biomass, hydrolysis, solid acid, catalyst, depolymerization, reaction mechanism, Sba-15, Zr

Аннотация: Arabinogalactan depolymerization over solid Zr-containing SBA-15-based catalyst was studied via HPLC, GPC, and theoretical modeling. Arabinogalactans (AG) are hemicelluloses mainly present in larch wood species, which can be extracted on an industrial scale. The application of solid acid catalysts in the processes of hemicellulose conversion can exclude serious drawbacks such as equipment corrosion, etc. Characterization of 5%Zr-SBA-15 confirmed the successful formation of the mesoporous structure inherent to SBA-15 with fine Zr distribution and strong acidic properties (XRD, XPS, FTIR, pHpzc). Carrying out the process at 130 °C allowed us to achieve total products yield of up to 59 wt%, which is represented mainly by galactose (51 wt%) and minor (less than 9 wt%) presence of arabinose, furfural, 5-HMF, and levulinic acid. The temperature increases up to 150 °C resulted in a total product yield drop down to 37 wt%, making temperature elevation above 130 °C obsolete. According to the theoretical investigations, arabinogalactan depolymerization follows the primary cleavage of the β(1→3) bonds between the D-galactose units of the main chain, which is also confirmed by GPC.

Журнал: Molecules

Выпуск журнала: Т.27, №24

Номера страниц: 8756

ISSN журнала: 14203049

Издатель: MDPI

• Sychev Valentin V. (Department of Non-Ferrous Metals and Materials Science, Siberian Federal University)
• Malyar Yuriy N. (Department of Non-Ferrous Metals and Materials Science, Siberian Federal University)
• Skripnikov Andrey M. (Department of Non-Ferrous Metals and Materials Science, Siberian Federal University)
• Trotsky Yuriy A. (Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences)
• Zaitseva Yulia N. (Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences)
• Eremina Anna O. (Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences)
• Borovkova Valentina S. (Department of Non-Ferrous Metals and Materials Science, Siberian Federal University)
• Taran Oxana P. (Department of Non-Ferrous Metals and Materials Science, Siberian Federal University)

• Ядро РИНЦ (eLIBRARY.RU)