BED EFFICIENCY FOR DISPLACEMENT WASHING OF KRAFT SOFTWOOD AND HARDWOOD PULPS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39912907" target="_blank" >RIV/00216275:25310/18:39912907 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

BED EFFICIENCY FOR DISPLACEMENT WASHING OF KRAFT SOFTWOOD AND HARDWOOD PULPS

Popis výsledku v původním jazyce

Using a laboratory displacement washing cell, kraft long fibre softwood and short fibre hardwood pulps cooked from spruce and a blend of deciduous woods, respectively, were subjected to displacement washing with water as a wash liquid. Based on the washing breakthrough curves measured for alkali lignin, the Peclet number was evaluated and the washing efficiency was characterised by bed efficiency at a wash liquor ratio equal to unity. For both pulps, bed efficiency increases with increasing Peclet number, however, it decreases with increasing dimensionless dispersion length. At pulp bed consistency of 120 to 130 kg m(-3), the bed efficiency of short fibre hardwood pulp was found to be greater in comparison with that of long fibre spruce pulp, which has lower permeability and greater specific hydraulic resistance. Since the displacement was the dominant mechanism during the initial period of the washing process, bed efficiency greater than unity was achieved for both pulps.

Název v anglickém jazyce

BED EFFICIENCY FOR DISPLACEMENT WASHING OF KRAFT SOFTWOOD AND HARDWOOD PULPS

Popis výsledku anglicky

Using a laboratory displacement washing cell, kraft long fibre softwood and short fibre hardwood pulps cooked from spruce and a blend of deciduous woods, respectively, were subjected to displacement washing with water as a wash liquid. Based on the washing breakthrough curves measured for alkali lignin, the Peclet number was evaluated and the washing efficiency was characterised by bed efficiency at a wash liquor ratio equal to unity. For both pulps, bed efficiency increases with increasing Peclet number, however, it decreases with increasing dimensionless dispersion length. At pulp bed consistency of 120 to 130 kg m(-3), the bed efficiency of short fibre hardwood pulp was found to be greater in comparison with that of long fibre spruce pulp, which has lower permeability and greater specific hydraulic resistance. Since the displacement was the dominant mechanism during the initial period of the washing process, bed efficiency greater than unity was achieved for both pulps.

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

2018

Kód důvěrnosti údajů

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

Název periodika

Cellulose Chemistry and Technology

ISSN

0576-9787

e-ISSN

—

Svazek periodika

52

Číslo periodika v rámci svazku

5-6

Stát vydavatele periodika

RO - Rumunsko

Počet stran výsledku

9

Strana od-do

393-401

Kód UT WoS článku

000441011900008

EID výsledku v databázi Scopus

2-s2.0-85050828317