Extraction of Hemicelluloses by Acid Catalyzed Hydrolysis
Gladyshko, Yulia (2011)
Gladyshko, Yulia
Saimaan ammattikorkeakoulu
2011
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-201105249275
https://urn.fi/URN:NBN:fi:amk-201105249275
Tiivistelmä
The techniques of chemical hydrolysis can be employed in order to separate polysaccharides from wood in a form of monosaccharides. Various acids can be used as the catalyst such as mineral acids and organic acids at certain operational conditions, i.e. temperature, pressure and time.
The aim of this study was to investigate effects of different hydrolysis techniques on the two types of raw material, birch chips and sawdust mixture of softwood. The obtained hydrolyzate were analyzed, e.g. pH measurement, measurement of dry solids content, and monosaccharides identification by the capillary electrophoresis method.
The results revealed that sulfuric acid catalyzed hydrolysis was more effective in a comparison with other two methods. Thus it is the most prospective approach for sugars extraction among tested methods. Moreover, hydrolyzates received from SW sawdust treatment contained more products than other hydrolyzates samples, but the hydrolyzate from treated birch chips revealed a high concentration of xylose.
Xylose-rich liquors of acid hydrolysis of birch chips can be used in xylitol production after required cleaning procedures, while glucose-rich hydrolyzates from treated SW sawdust can be utilized in biofuel production.
The aim of this study was to investigate effects of different hydrolysis techniques on the two types of raw material, birch chips and sawdust mixture of softwood. The obtained hydrolyzate were analyzed, e.g. pH measurement, measurement of dry solids content, and monosaccharides identification by the capillary electrophoresis method.
The results revealed that sulfuric acid catalyzed hydrolysis was more effective in a comparison with other two methods. Thus it is the most prospective approach for sugars extraction among tested methods. Moreover, hydrolyzates received from SW sawdust treatment contained more products than other hydrolyzates samples, but the hydrolyzate from treated birch chips revealed a high concentration of xylose.
Xylose-rich liquors of acid hydrolysis of birch chips can be used in xylitol production after required cleaning procedures, while glucose-rich hydrolyzates from treated SW sawdust can be utilized in biofuel production.