Cake filtration in viscoelastic liquids

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39913390" target="_blank" >RIV/00216275:25310/18:39913390 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Cake filtration in viscoelastic liquids

Popis výsledku v původním jazyce

The paper deals with the modeling of the constant-pressure cake filtration of suspensions in viscoelastic liquids. The filtration equations are presented based on the capillary hybrid model for power law fluid flow and comprising correction functions of the influence of dispersing liquid elasticity. The validity of these equations has been verified experimentally. The tests with suspensions of nearly spherical polystyrene particles Krasten in viscoelastic aqueous solutions of polyacrylamides Kerafloc and Praestol were performed at constant pressure in a laboratory cylindrical filtration unit. The rheological properties of liquids have been measured on a rotational rheometer Mars II and an extensional rheometer Caber 1. By analysing the experimental data, the filtration characteristics have been evaluated. The elastic effects manifest themselves predominantly at the early period of the filtration due to a higher filtration velocity which results in an evidently increased filtration resistance. The satisfactory agreement of the experimental dependences of the cumulative filtration volume on the time of filtration has been achieved when compared to those obtained by the numerical solution of the proposed differential equation of filtration. This confirms that the cake filtration from viscoelastic liquids can be predicted with a satisfactory accuracy, thus making the suggested filtration model applicable in practice.

Název v anglickém jazyce

Cake filtration in viscoelastic liquids

Popis výsledku anglicky

The paper deals with the modeling of the constant-pressure cake filtration of suspensions in viscoelastic liquids. The filtration equations are presented based on the capillary hybrid model for power law fluid flow and comprising correction functions of the influence of dispersing liquid elasticity. The validity of these equations has been verified experimentally. The tests with suspensions of nearly spherical polystyrene particles Krasten in viscoelastic aqueous solutions of polyacrylamides Kerafloc and Praestol were performed at constant pressure in a laboratory cylindrical filtration unit. The rheological properties of liquids have been measured on a rotational rheometer Mars II and an extensional rheometer Caber 1. By analysing the experimental data, the filtration characteristics have been evaluated. The elastic effects manifest themselves predominantly at the early period of the filtration due to a higher filtration velocity which results in an evidently increased filtration resistance. The satisfactory agreement of the experimental dependences of the cumulative filtration volume on the time of filtration has been achieved when compared to those obtained by the numerical solution of the proposed differential equation of filtration. This confirms that the cake filtration from viscoelastic liquids can be predicted with a satisfactory accuracy, thus making the suggested filtration model applicable in practice.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

20402 - Chemical process engineering

Projekt

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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

Scientific Papers of the University of Pardubice, Series A, Faculty of Chemical Technology

ISSN

1211-5541

e-ISSN

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Svazek periodika

24

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

14

Strana od-do

197-210

Kód UT WoS článku

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EID výsledku v databázi Scopus

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