Displacement washing of softwood pulp cooked to various levels of residual lignin content

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F21%3A39917492" target="_blank" >RIV/00216275:25310/21:39917492 - isvavai.cz</a>

Výsledek na webu

<a href="https://imisrise.tappi.org/TAPPI/Products/21/SEP/21SEP553.aspx" target="_blank" >https://imisrise.tappi.org/TAPPI/Products/21/SEP/21SEP553.aspx</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.32964/TJ20.9.553" target="_blank" >10.32964/TJ20.9.553</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Displacement washing of softwood pulp cooked to various levels of residual lignin content

Popis výsledku v původním jazyce

This study investigates the influence of the degree of delignification of kraft spruce pulp cooked at seven different kappa numbers, ranging from 18.1 to 50.1, on the efficiency of displacement washing under laboratory conditions. Although the pulp bed is a polydispersive and heterogeneous system, the correlation dependence of the wash yield and bed efficiency on the Peclet number and the kappa number of the pulp showed that washing efficiency increased not only with an increasing Peclet number, but also with an increasing kappa number. The linear dependence between the mean residence time of the solute lignin in the bed and the space time, which reflects the residence time of the wash liquid in the pulp bed, was found for all levels of the kappa number. Washing also reduced the kappa number and the residual lignin content in the pulp fibers. Application: Of the basic brownstock washing operations, displacement washing is the most important and effective mechanism, and washing equipment is designed with emphasis on it. The information in this paper will enrich resources related to pulp washing that can impact end-product quality. Application: Of the basic brownstock washing operations, displacement washing is the most important and effective mechanism, and washing equipment is designed with emphasis on it. The information in this paper will enrich resources related to pulp washing that can impact end-product quality.

Název v anglickém jazyce

Displacement washing of softwood pulp cooked to various levels of residual lignin content

Popis výsledku anglicky

This study investigates the influence of the degree of delignification of kraft spruce pulp cooked at seven different kappa numbers, ranging from 18.1 to 50.1, on the efficiency of displacement washing under laboratory conditions. Although the pulp bed is a polydispersive and heterogeneous system, the correlation dependence of the wash yield and bed efficiency on the Peclet number and the kappa number of the pulp showed that washing efficiency increased not only with an increasing Peclet number, but also with an increasing kappa number. The linear dependence between the mean residence time of the solute lignin in the bed and the space time, which reflects the residence time of the wash liquid in the pulp bed, was found for all levels of the kappa number. Washing also reduced the kappa number and the residual lignin content in the pulp fibers. Application: Of the basic brownstock washing operations, displacement washing is the most important and effective mechanism, and washing equipment is designed with emphasis on it. The information in this paper will enrich resources related to pulp washing that can impact end-product quality. Application: Of the basic brownstock washing operations, displacement washing is the most important and effective mechanism, and washing equipment is designed with emphasis on it. The information in this paper will enrich resources related to pulp washing that can impact end-product quality.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20502 - Paper and wood

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

TAPPI Journal

ISSN

0734-1415

e-ISSN

—

Svazek periodika

20

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

553-563

Kód UT WoS článku

000705303400002

EID výsledku v databázi Scopus

2-s2.0-85117051069