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Article

Larix Sibirica Arabinogalactan Hydrolysis over Zr-SBA-15; Depolymerization Insight

by
Valentin V. Sychev
1,2,*,
Yuriy N. Malyar
1,2,
Andrey M. Skripnikov
1,2,
Yuriy A. Trotsky
1,
Yulia N. Zaitseva
1,
Anna O. Eremina
1,
Valentina S. Borovkova
1,2 and
Oxana P. Taran
1,2,*
1
Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Bld. 24, 660036 Krasnoyarsk, Russia
2
Department of Non-Ferrous Metals and Materials Science, Siberian Federal University, pr. Svobodny 79, 660041 Krasnoyarsk, Russia
*
Authors to whom correspondence should be addressed.
Molecules 2022, 27(24), 8756; https://doi.org/10.3390/molecules27248756
Submission received: 2 November 2022 / Revised: 29 November 2022 / Accepted: 8 December 2022 / Published: 9 December 2022
(This article belongs to the Special Issue Recent Insights into Biopolymer Processing, from Preparation to Fundamental Properties and Industrial Applications)
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Abstract

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.
Keywords: arabinogalactan; biomass; hydrolysis; solid acid; catalyst; depolymerization; reaction mechanism; SBA-15; Zr arabinogalactan; biomass; hydrolysis; solid acid; catalyst; depolymerization; reaction mechanism; SBA-15; Zr

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MDPI and ACS Style

Sychev, V.V.; Malyar, Y.N.; Skripnikov, A.M.; Trotsky, Y.A.; Zaitseva, Y.N.; Eremina, A.O.; Borovkova, V.S.; Taran, O.P. Larix Sibirica Arabinogalactan Hydrolysis over Zr-SBA-15; Depolymerization Insight. Molecules 2022, 27, 8756. https://doi.org/10.3390/molecules27248756

AMA Style

Sychev VV, Malyar YN, Skripnikov AM, Trotsky YA, Zaitseva YN, Eremina AO, Borovkova VS, Taran OP. Larix Sibirica Arabinogalactan Hydrolysis over Zr-SBA-15; Depolymerization Insight. Molecules. 2022; 27(24):8756. https://doi.org/10.3390/molecules27248756

Chicago/Turabian Style

Sychev, Valentin V., Yuriy N. Malyar, Andrey M. Skripnikov, Yuriy A. Trotsky, Yulia N. Zaitseva, Anna O. Eremina, Valentina S. Borovkova, and Oxana P. Taran. 2022. "Larix Sibirica Arabinogalactan Hydrolysis over Zr-SBA-15; Depolymerization Insight" Molecules 27, no. 24: 8756. https://doi.org/10.3390/molecules27248756

APA Style

Sychev, V. V., Malyar, Y. N., Skripnikov, A. M., Trotsky, Y. A., Zaitseva, Y. N., Eremina, A. O., Borovkova, V. S., & Taran, O. P. (2022). Larix Sibirica Arabinogalactan Hydrolysis over Zr-SBA-15; Depolymerization Insight. Molecules, 27(24), 8756. https://doi.org/10.3390/molecules27248756

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