Sorption purification of xylose hydrolysate by activated carbon from cellolignin
https://doi.org/10.21266/2079-4304.2024.250.353-365
Abstract
High quality requirements for xylitol are due to its use in food and pharmaceutical industries. An important task in preparation of xylose solutions for hydrogenation is solution clarification, since xylitol is a white crystalline powder. For this purpose sorption and flocculation purification of the obtained solutions as well as membrane methods are used. The most commonly used sorption purification is activated carbon, the treatment of which is effective in reducing the color of the solutions obtained. The article considers the necessity of sorption purification of xylose hydrolysate and presents a comparative characterization of the efficiency of the process of clarification of pentose hydrolysate of birch wood by granulated active carbon (GAC) from cellolignin and BAU-A wood active carbon. The degree of clarification of hydrolysate when using GAC is higher than that of BAU-A and the required color is achieved when adding GAC in the amount of 17% of the CB of hydrolysate. The use of GAC for sorption purification of pentose hydrolysates allows to reduce the consumption of sorbents for clarification of hydrolysates in 1.3 times. The data on regeneration of spent GAC from cellolignin at different duration of treatment, as well as the results of efficiency of clarification of xylose solutions by regenerated GAC are presented. The regenerated GAC are suitable for sorption purification of hydrolysate. Sufficient duration of regeneration was 20 minutes. Organization of production of GAC from cellolignin will significantly reduce the cost of sorptive treatment of hydrolysate and increase the economic efficiency of xylitol production.
About the Authors
S. R. Mambetova
St.Petersburg State Forest Technical University
Russian Federation
Russian Federation
Mambetova Sofya R. – Master's student Institute of Chemical Processing of Wood Biomass and Technosphere Safety
194021. Institute per. 5. St. Petersburg
A. V. Bakhtiiarova
St.Petersburg state Forest Technical University
Russian Federation
Russian Federation
Bakhtiiarova Anna V. – Senior Lecturer of the Department of technology of wood chemical products, wood chemistry and biotechnology
194021. Institute per. 5. St. Petersburg
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Review
For citations:
Mambetova S.R., Bakhtiiarova A.V. Sorption purification of xylose hydrolysate by activated carbon from cellolignin. Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii. 2024;(250):353-365. (In Russ.) https://doi.org/10.21266/2079-4304.2024.250.353-365
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