Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.3390/catal11111362
Ключевые слова: alkali and acid pretreatment, birch wood, hydrogenation, methoxyphenols, microcrystalline cellulose, ru/carbon catalyst, xylose
Аннотация: 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 influenПоказать полностьюces 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 cellu-lose. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Журнал: Catalysts
Выпуск журнала: Vol. 11, Is. 11
Номера страниц: 1362
ISSN журнала: 20734344
Издатель: MDPI