ISSN 2457-9459 (Online)
ISSN-L 0576-9787 (Print)
2023
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Journal Citation Reports |
Impact factor 2023: 1.3
5-Year Impact Factor: 1.2
Article Influence® Score: 0.140
Ranked 9 out of 23
MATERIALS SCIENCE, PAPER & WOOD (Q2) |
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Scopus |
CiteScore 2023: 2.3
SNIP: 0.405 |
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SCImago |
SJR: 0.264
H-Index: 42
Ranked Q3 |
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Title
Displacement washing of kraft pulp with aqueous solutions of surfactants
Authors
FRANTISEK POTUCEK and IDA SKOTNICOVA
Received
October 24, 2012
Published
Volume 47 Issue 9-10 October-December
Keywords
kraft pulp, displacement washing, surfactants
Abstract
The aim of this work was to investigate the effect of the addition of surfactants to the wash liquid on the washing
efficiency during displacement of black liquor from the fibre bed of unbleached kraft pulp. Aqueous solutions of two
non-ionic surfactants and an anionic one were used. For comparison, distilled water was also used as wash liquid.
Laboratory displacement washing experiments were performed in a cylindrical glass cell. A step change response
method was chosen to describe the displacement of black liquor. The breakthrough curves were measured for alkali
lignin using ultraviolet spectrophotometry. The flow of the wash liquid through a pulp bed was described by the
dispersion model involving one dimensionless parameter known as the Péclet number. In order to characterize the
displacement washing efficiency with aqueous solutions of surfactants, not only was the wash yield correlated with the
Péclet number, but also a new dimensionless criterion involving intrinsic properties of aqueous solutions was derived.
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