Vše

Co hledáte?

Vše
Projekty
Výsledky výzkumu
Subjekty

Rychlé hledání

  • Projekty podpořené TA ČR
  • Významné projekty
  • Projekty s nejvyšší státní podporou
  • Aktuálně běžící projekty

Chytré vyhledávání

  • Takto najdu konkrétní +slovo
  • Takto z výsledků -slovo zcela vynechám
  • “Takto můžu najít celou frázi”

Gas−liquid contactors’ aeration capacities when agitated by Rushton turbines of various diameters

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F20%3A00523478" target="_blank" >RIV/67985874:_____/20:00523478 - isvavai.cz</a>

  • Nalezeny alternativní kódy

    RIV/60461373:22340/20:43921568

  • Výsledek na webu

    <a href="http://hdl.handle.net/11104/0307838" target="_blank" >http://hdl.handle.net/11104/0307838</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1021/acsomega.9b04005" target="_blank" >10.1021/acsomega.9b04005</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Gas−liquid contactors’ aeration capacities when agitated by Rushton turbines of various diameters

  • Popis výsledku v původním jazyce

    Mass transfer processes are one of the most important operations in chemical, biochemical, and food industries worldwide. In the processes that are controlled by the gas-liquid mass transfer rate, the volumetric mass transfer coefficient kLa becomes a crucial quantity. The dataset was measured with the aim to create a correlation for kLa prediction in a non-coalescent batch under the wide range of experimental conditions. The dynamic pressure method, which was reported as physically correct in the past, was chosen to be the method for experimental determination of kLa. Our previous work targeted the kLa dependencies in viscous and coalescent batches resulting in correlations that are viable for the broad range of process conditions. We reported that the best-fit correlation is based on the hydrodynamic parameter circumferential velocity of impeller blades in the case of non-coalescent liquids in the vessel equipped by single or multiple impellers at a constant D/T ratio (diameter of the impeller to the inner diameter of the tank). Now, we focus on the influence of various impeller diameters on transport characteristics (mainly kLa) in a non-coalescent batch. The experiments are carried out in a multiple-impeller vessel equipped with Rushton turbines (of four diameters) and in both laboratory and pilot-plant scales. Various impeller frequencies and gas flow rates are used. We examine the suitability of the hydrodynamic description, which was reported in the past, to predict kLa also when the D/T ratio changes. We show that the correlation based on the energy dissipation rate better fits the experimental data and predicts kLa values more accurately in the case of varying D/T values. This correlation could be adopted in the design and scale-up of agitated devices operating with non-coalescent batches.

  • Název v anglickém jazyce

    Gas−liquid contactors’ aeration capacities when agitated by Rushton turbines of various diameters

  • Popis výsledku anglicky

    Mass transfer processes are one of the most important operations in chemical, biochemical, and food industries worldwide. In the processes that are controlled by the gas-liquid mass transfer rate, the volumetric mass transfer coefficient kLa becomes a crucial quantity. The dataset was measured with the aim to create a correlation for kLa prediction in a non-coalescent batch under the wide range of experimental conditions. The dynamic pressure method, which was reported as physically correct in the past, was chosen to be the method for experimental determination of kLa. Our previous work targeted the kLa dependencies in viscous and coalescent batches resulting in correlations that are viable for the broad range of process conditions. We reported that the best-fit correlation is based on the hydrodynamic parameter circumferential velocity of impeller blades in the case of non-coalescent liquids in the vessel equipped by single or multiple impellers at a constant D/T ratio (diameter of the impeller to the inner diameter of the tank). Now, we focus on the influence of various impeller diameters on transport characteristics (mainly kLa) in a non-coalescent batch. The experiments are carried out in a multiple-impeller vessel equipped with Rushton turbines (of four diameters) and in both laboratory and pilot-plant scales. Various impeller frequencies and gas flow rates are used. We examine the suitability of the hydrodynamic description, which was reported in the past, to predict kLa also when the D/T ratio changes. We show that the correlation based on the energy dissipation rate better fits the experimental data and predicts kLa values more accurately in the case of varying D/T values. This correlation could be adopted in the design and scale-up of agitated devices operating with non-coalescent batches.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    10305 - Fluids and plasma physics (including surface physics)

Návaznosti výsledku

  • Projekt

  • Návaznosti

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2020

  • Kód důvěrnosti údajů

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

Údaje specifické pro druh výsledku

  • Název periodika

    ACS Omega

  • ISSN

    2470-1343

  • e-ISSN

  • Svazek periodika

    5

  • Číslo periodika v rámci svazku

    10

  • Stát vydavatele periodika

    US - Spojené státy americké

  • Počet stran výsledku

    6

  • Strana od-do

    5072-5077

  • Kód UT WoS článku

    000520853400039

  • EID výsledku v databázi Scopus

    2-s2.0-85081694628