Gas-liquid-solid volumetric mass transfer coefficient and impeller power consumptions for industrial vessel design

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F18%3A43916343" target="_blank" >RIV/60461373:22340/18:43916343 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0017931017353395?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0017931017353395?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijheatmasstransfer.2018.01.041" target="_blank" >10.1016/j.ijheatmasstransfer.2018.01.041</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Gas-liquid-solid volumetric mass transfer coefficient and impeller power consumptions for industrial vessel design

Popis výsledku v původním jazyce

Waste-water treatment, fermentation, chlorination/de-chlorination and hydrogenation are processes often realized in mechanically agitated vessels. In many cases the gas-liquid mass transfer can be the limiting process in the utilization of mechanically agitated vessels. The parameter describing gas-liquid mass transfer intensity (volumetric mass transfer coefficient k(L)a) becomes than the key parameter. Because in fermentation processes as well as in hydrogenation ones solid particles are usually also present in gas liquid system, we aim to study experimentally the effect of solid particles presence on k(L)a and power input values using reliable measuring methods. This study broadens the results on transport characteristics published in IJHMT recently (Petricek et al., 2017) [1]. Measurements were conducted in a three phase multiple-impeller fermenter of i.d. 29 cm containing microparticles of the diameter 137 +/- 30 mu m. To cover the effect of impeller type in our results, we gradually used Rushton turbine, Pitched-blade pumping down and Techmix pumping down impellers of the diameter of 1/3 of the vessel diameter. To measure k(L)a using dissolved oxygen (DO) polarographic probes the Dynamic pressure method (DPM) has been chosen. We present our results in the form of dependencies of k(L)a on process parameters as impeller power, gas superficial velocity, impeller blade speed, etc. We used several mathematical shapes of the dependencies to find which ones will describe the k(L)a dependency accurately well, to be used in agitated vessels industrial design, when gas-liquid-solid system should be treated. Usually, k(L)a correlations are based on gassed power input and superficial gas velocity. We tested several correlation types, evaluated their empirical parameters and proposed the correlation shapes suitable for fermenter design, operating and scale-up under the conditions, where solid particles affect the interfacial mass transfer. (C) 2018 Elsevier Ltd. All rights reserved.

Název v anglickém jazyce

Gas-liquid-solid volumetric mass transfer coefficient and impeller power consumptions for industrial vessel design

Popis výsledku anglicky

Waste-water treatment, fermentation, chlorination/de-chlorination and hydrogenation are processes often realized in mechanically agitated vessels. In many cases the gas-liquid mass transfer can be the limiting process in the utilization of mechanically agitated vessels. The parameter describing gas-liquid mass transfer intensity (volumetric mass transfer coefficient k(L)a) becomes than the key parameter. Because in fermentation processes as well as in hydrogenation ones solid particles are usually also present in gas liquid system, we aim to study experimentally the effect of solid particles presence on k(L)a and power input values using reliable measuring methods. This study broadens the results on transport characteristics published in IJHMT recently (Petricek et al., 2017) [1]. Measurements were conducted in a three phase multiple-impeller fermenter of i.d. 29 cm containing microparticles of the diameter 137 +/- 30 mu m. To cover the effect of impeller type in our results, we gradually used Rushton turbine, Pitched-blade pumping down and Techmix pumping down impellers of the diameter of 1/3 of the vessel diameter. To measure k(L)a using dissolved oxygen (DO) polarographic probes the Dynamic pressure method (DPM) has been chosen. We present our results in the form of dependencies of k(L)a on process parameters as impeller power, gas superficial velocity, impeller blade speed, etc. We used several mathematical shapes of the dependencies to find which ones will describe the k(L)a dependency accurately well, to be used in agitated vessels industrial design, when gas-liquid-solid system should be treated. Usually, k(L)a correlations are based on gassed power input and superficial gas velocity. We tested several correlation types, evaluated their empirical parameters and proposed the correlation shapes suitable for fermenter design, operating and scale-up under the conditions, where solid particles affect the interfacial mass transfer. (C) 2018 Elsevier Ltd. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20401 - Chemical engineering (plants, products)

Projekt

<a href="/cs/project/GA15-21715S" target="_blank" >GA15-21715S: Experimentální studie přenosu hmoty kapalina-plyn za přítomnosti pevných částis a ve viskózní vsádce</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

International Journal Heat Mass Transfer

ISSN

0017-9310

e-ISSN

—

Svazek periodika

121

Číslo periodika v rámci svazku

10 January

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

653-662

Kód UT WoS článku

000430030300057

EID výsledku v databázi Scopus

2-s2.0-85041013744