Fractionation of Birch Wood by Integrating Alkaline-Acid Treatments and Hydrogenation in Ethanol over a Bifunctional Ruthenium Catalyst

For the first time, the fractionation of birch wood into microcrystalline cellulose, xylose and methoxyphenols is suggested based on the integration of alkali-acid pretreatments and hydrogenation in ethanol over a bifunctional Ru/C catalyst. It is established that removal of hemicelluloses during pr...

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Autores principales:	Boris N. Kuznetsov, Sergey V. Baryshnikov, Angelina V. Miroshnikova, Aleksandr S. Kazachenko, Yuriy N. Malyar, Andrey M. Skripnikov, Oxana P. Taran
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	birch wood alkali and acid pretreatment hydrogenation Ru/carbon catalyst microcrystalline cellulose xylose Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/0615a8375cde473589ba866d45c4497f
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spelling	oai:doaj.org-article:0615a8375cde473589ba866d45c4497f2021-11-25T17:06:20ZFractionation of Birch Wood by Integrating Alkaline-Acid Treatments and Hydrogenation in Ethanol over a Bifunctional Ruthenium Catalyst10.3390/catal111113622073-4344https://doaj.org/article/0615a8375cde473589ba866d45c4497f2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1362https://doaj.org/toc/2073-4344For the first time, the fractionation of birch wood into microcrystalline cellulose, xylose and methoxyphenols is suggested based on the integration of alkali-acid pretreatments and hydrogenation in ethanol over a bifunctional Ru/C catalyst. It is established that removal of hemicelluloses during pretreatments of birch wood influences the yields of the liquid, gaseous and solid products of the non-catalytic and catalytic hydrogenation of pretreated samples in ethanol at 225 °C. The bifunctional Ru/carbon catalyst affects in different ways the conversion and yields of products of hydrogenation of the initial and acid- and alkali-pretreated birch wood. The most noticeable influence is characteristic of the hydrogenation of the acid-pretreated wood, where in contrast to the non-catalytic hydrogenation, the wood conversion and the yields of liquid products increase but the yields of the solid and gaseous products decrease. GC-MS, gel permeation chromatography and elemental analysis were used for characterization of the liquid product composition. The molecular mass distribution of the liquid products of hydrogenation of the initial and pretreated wood shifts towards the low-molecular range in the presence of the catalyst. From the GC-MS data, the contents of monomer compounds, predominantly 4-propylsyringol and 4-propanolsyringol, increase in the presence of the ruthenium catalyst. The solid products of catalytic hydrogenation of the pretreated wood contain up to 95 wt% of cellulose with the structure, similar to that of microcrystalline cellulose.Boris N. KuznetsovSergey V. BaryshnikovAngelina V. MiroshnikovaAleksandr S. KazachenkoYuriy N. MalyarAndrey M. SkripnikovOxana P. TaranMDPI AGarticlebirch woodalkali and acid pretreatmenthydrogenationRu/carbon catalystmicrocrystalline cellulosexyloseChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1362, p 1362 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	birch wood alkali and acid pretreatment hydrogenation Ru/carbon catalyst microcrystalline cellulose xylose Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	birch wood alkali and acid pretreatment hydrogenation Ru/carbon catalyst microcrystalline cellulose xylose Chemical technology TP1-1185 Chemistry QD1-999 Boris N. Kuznetsov Sergey V. Baryshnikov Angelina V. Miroshnikova Aleksandr S. Kazachenko Yuriy N. Malyar Andrey M. Skripnikov Oxana P. Taran Fractionation of Birch Wood by Integrating Alkaline-Acid Treatments and Hydrogenation in Ethanol over a Bifunctional Ruthenium Catalyst
description	For the first time, the fractionation of birch wood into microcrystalline cellulose, xylose and methoxyphenols is suggested based on the integration of alkali-acid pretreatments and hydrogenation in ethanol over a bifunctional Ru/C catalyst. It is established that removal of hemicelluloses during pretreatments of birch wood influences the yields of the liquid, gaseous and solid products of the non-catalytic and catalytic hydrogenation of pretreated samples in ethanol at 225 °C. The bifunctional Ru/carbon catalyst affects in different ways the conversion and yields of products of hydrogenation of the initial and acid- and alkali-pretreated birch wood. The most noticeable influence is characteristic of the hydrogenation of the acid-pretreated wood, where in contrast to the non-catalytic hydrogenation, the wood conversion and the yields of liquid products increase but the yields of the solid and gaseous products decrease. GC-MS, gel permeation chromatography and elemental analysis were used for characterization of the liquid product composition. The molecular mass distribution of the liquid products of hydrogenation of the initial and pretreated wood shifts towards the low-molecular range in the presence of the catalyst. From the GC-MS data, the contents of monomer compounds, predominantly 4-propylsyringol and 4-propanolsyringol, increase in the presence of the ruthenium catalyst. The solid products of catalytic hydrogenation of the pretreated wood contain up to 95 wt% of cellulose with the structure, similar to that of microcrystalline cellulose.
format	article
author	Boris N. Kuznetsov Sergey V. Baryshnikov Angelina V. Miroshnikova Aleksandr S. Kazachenko Yuriy N. Malyar Andrey M. Skripnikov Oxana P. Taran
author_facet	Boris N. Kuznetsov Sergey V. Baryshnikov Angelina V. Miroshnikova Aleksandr S. Kazachenko Yuriy N. Malyar Andrey M. Skripnikov Oxana P. Taran
author_sort	Boris N. Kuznetsov
title	Fractionation of Birch Wood by Integrating Alkaline-Acid Treatments and Hydrogenation in Ethanol over a Bifunctional Ruthenium Catalyst
title_short	Fractionation of Birch Wood by Integrating Alkaline-Acid Treatments and Hydrogenation in Ethanol over a Bifunctional Ruthenium Catalyst
title_full	Fractionation of Birch Wood by Integrating Alkaline-Acid Treatments and Hydrogenation in Ethanol over a Bifunctional Ruthenium Catalyst
title_fullStr	Fractionation of Birch Wood by Integrating Alkaline-Acid Treatments and Hydrogenation in Ethanol over a Bifunctional Ruthenium Catalyst
title_full_unstemmed	Fractionation of Birch Wood by Integrating Alkaline-Acid Treatments and Hydrogenation in Ethanol over a Bifunctional Ruthenium Catalyst
title_sort	fractionation of birch wood by integrating alkaline-acid treatments and hydrogenation in ethanol over a bifunctional ruthenium catalyst
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/0615a8375cde473589ba866d45c4497f
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Fractionation of Birch Wood by Integrating Alkaline-Acid Treatments and Hydrogenation in Ethanol over a Bifunctional Ruthenium Catalyst

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