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24 results on '"Małachowska, Edyta"'

17. Influences of Fiber and Pulp Properties on Papermaking Ability of Cellulosic Pulps Produced from Alternative Fibrous Raw Materials.

Author

Małachowska, Edyta, Lipkiewicz, Aneta, Niemczyk, Marzena, Dubowik, Marcin, Boruszewski, Piotr, and Przybysz, Piotr

Subjects
*RAW materials, *PAPERMAKING, *CELLULOSE fibers, *FIBERS, *MANUFACTURING processes, *POINT set theory
Abstract

The analyzes of cellulosic fibers and properties of cellulosic pulps are extremely important in the process of paper production. If the set point is known, we can predict fairly accurately the effects of fiber dimensions and pulp properties on the final product, which would consequently help in the precise selection of fibrous raw material types suitable for specific recipes and paper applications. In this study, the correlations between the dimensions of cellulosic fibers of alternative fibrous raw materials, pulp properties, and paper were investigated to predict paper strength based on the parameters characterizing the pulp. [ABSTRACT FROM AUTHOR]

Published
2021
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24. The Effect of Lignin Content in Birch and Beech Kraft Cellulosic Pulps on Simple Sugar Yields from the Enzymatic Hydrolysis of Cellulose.

Author

Przybysz Buzała, Kamila, Kalinowska, Halina, Małachowska, Edyta, Boruszewski, Piotr, Krajewski, Krzysztof, and Przybysz, Piotr

Subjects
SULFATE pulping process, BEECH, LIGNINS, BIRCH, WOOD-pulp, LIGNOCELLULOSE, CELLULOSE, MATERIALS testing
Abstract

The results of enzymatic hydrolysis of birch and beech kraft cellulosic pulps indicate that they may be promising feedstocks for fermentation processes including biofuel manufacturing. The aim of this study was to investigate whether birch and beech wood require the same degree of delignification by kraft pulping as pine wood. The differences observed in the efficiency of hydrolysis for the raw materials tested suggest that the differences in the anatomical structure of the examined wood in relation to pine wood is essential for the efficiency of the enzymatic hydrolysis process. The yields of glucose and other reducing sugars obtained from the birch and beech cellulosic pulps were similar (up to around 75% and 98.3% dry weight, and 76% and 98.6% dry weight, respectively). The highest glucose yields from cellulose contained in the birch and beech pulp were around 81.2% (at a Kappa number of 28.3) and 83.1% (at a Kappa number of 30.4), respectively. The maximum glucose yields and total reducing sugars of birch wood on a dry weight basis (39.8% and 52.1%, respectively) were derived from the pulp at a Kappa number of 28.3, while the highest yields of glucose and total reducing sugars of beech wood on a dry weight basis (around 36.9% and 48.2%, respectively) were reached from the pulp at a Kappa number of 25.3. To obtain the highest glucose yields and total reducing sugars of a wood on a dry weight basis, total lignin elimination from the birch and beech pulps was not necessary. However more in-depth delignification of birch and beech wood is required than for pine wood. [ABSTRACT FROM AUTHOR]

Published
2019
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