slide1
Download
Skip this Video
Download Presentation
10 th Conference on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering Braga, Portugal

Loading in 2 Seconds...

play fullscreen
1 / 21

10 th Conference on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering Braga, Portugal - PowerPoint PPT Presentation


  • 165 Views
  • Uploaded on

Experimental study of gas-liquid mass transfer coupled with chemical reactions by digital holographic interferometry C. Wylock , S. Dehaeck, T. Cartage, P. Colinet, B. Haut. 10 th Conference on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering Braga, Portugal June , 26-29, 2011.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about '10 th Conference on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering Braga, Portugal' - tanek


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1
Experimental study of gas-liquid mass transfer coupled with chemical reactions by digital holographic interferometryC. Wylock, S. Dehaeck, T. Cartage, P. Colinet, B. Haut

10th Conference on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering

Braga, Portugal

June, 26-29, 2011

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

introduction
Introduction

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

  • Gas-liquidabsorbers
    • Importance of interfacialphenomena
    • Classicalmodellingapproaches: two-films, penetration, surface renewal…
    • Wellvalidated by numerousexperimentalworks … at the reactorscale !
    • Few worksvalidatingat the diffusion layer scale

Development of experimentaltool and procedureenabling the study of gas-liquid absorption coupledwithreactionat the interface scale

experimental setup
Experimental setup

coupledwithchemicalreactions in the liquid phase

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

Gas-liquid absorption performed in a Hele-Shaw cell and observed using a Mach-Zehnder interferometer

Test case: CO2 absorption in NaHCO3/Na2CO3 solution

experimental setup1
Experimental setup

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

Mach-Zehnderinterferometer

experimental setup2
Experimental setup

n

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

  • Interferogramsprocessing(seeChem. Eng. Sc. 66, pp.3400)
    • Refractive index variations field
    • Horizontal averaging profiles
mathematical modelling
Mathematical modelling

Gaseous phase

Gas - liquid

equilibrium

Interface

x=0

NaHCO3/Na2CO3aqueous solution

Diffusion

CO2 + CO3= + H2O ⇄ 2 HCO3-

Chemical reactions

X

Depth in the liquid phase

Schematic view of the gas-liquid absorption

mathematical m odelling
Mathematical modelling

with

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

  • Mass transfercoupledwithchemicalreaction
  • Physico-chemical

parameters

 literaturecorrelations

  • Numericalsolving

 concentration profiles

procedure overview
Procedureoverview

Experiments

Mass transfer model

Refractive index variations profiles

Species concentration variations profiles

How to compare ?

  • They have to beconvertedinto a comparable variable
  •  Density variations
  • Calibration to findcorrelations

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

procedure overview1
Procedureoverview

Experiments

Mass transfer model

Refractive index variations profiles

Species concentration variations profiles

Calibration

(refractometry)

Simulateddensity variations profiles

Experimentaldensity variations profiles

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

procedure overview2
Procedureoverview

Experiments

Mass transfer model

Refractive index variations profiles

Species concentration variations profiles

Calibration

(refractometry)

Simulateddensity variations profiles

Experimentaldensity variations profiles

Comparison

They match ?

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

experiments model comparison
Experiments – model comparison

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

  • Experimentscomparedwithsimulated profiles
    • Simulated profiles computedwith physico-chemicalparametersestimated by literaturecorrelations
    • No match  someparameters are not wellestimated, especiallyparameterstowardswhich the model isvery sensitive
procedure overview3
Procedureoverview

Experiments

Mass transfer model

Refractive index variations profiles

Species concentration variations profiles

Calibration

(refractometry)

Simulateddensity variations profiles

Experimentaldensity variations profiles

Comparison

They match ?

Physico-chemicalparameterfitting

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

procedure overview4
Procedureoverview

Experiments

Mass transfer model

Refractive index variations profiles

Species concentration variations profiles

Calibration

(refractometry)

Simulateddensity variations profiles

Experimentaldensity variations profiles

Comparison

They match ?

Physico-chemicalparameterfitting

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

procedure overview5
Procedureoverview

Experiments

Mass transfer model

Refractive index variations profiles

Species concentration variations profiles

Calibration

(refractometry)

Simulateddensity variations profiles

Experimentaldensity variations profiles

Comparison

They match

Physico-chemicalparameterfitted

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

experiments model comparison1
Experiments – model comparison

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

  • Parametersfitted least-square fitting
  • Parameters :
    • Correlations OK for h, k11, K2
    • New values for and ,corrections for and
  • Matchedresults
conclusions
Conclusions

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

  • Interferometry and procedure OK for the study of gas-liquid mass absorption coupledwithreactionsat interface scale
  • Results comparable to mass transfer model providedthatsome physico-chemicalparameters are wellestimated
  • Perspectives
    • Study of othersystems: CO2 in amines (scrubbing)
experimental setup3
Experimental setup

coupledwithchemicalreactions in the liquid phase

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

Gas-liquid absorption performed in a Hele-Shaw cell and observed using a Mach-Zehnder interferometer

Test case: CO2 absorption in NaHCO3/Na2CO3 solution

experimental setup4
Experimental setup

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

Mach-Zehnderinterferometer

calibration
Calibration

,

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

  • Link betweenrefractive index and density
    • Proposedcorrelation:
calibration1
Calibration

Transfers, Interfaces and Processes

Applied Science Faculty, Université Libre de Bruxelles

  • Link betweenspecies concentrations and density
    • Proposedcorrelation:
ad