Influence of Ions on the Coalescence Behavior phoenix project - - PowerPoint PPT Presentation

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influence of ions on the coalescence behavior
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Influence of Ions on the Coalescence Behavior phoenix project - - PowerPoint PPT Presentation

Jan 19, 2023 191 likes •352 views

Influence of Ions on the Coalescence Behavior phoenix project Horizon 2020 David Leleu, Andreas Pfennig dleleu@uliege.be Products, Environment, and Processes (PEPs) Department of Chemical Engineering Universit de Lige

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SLIDE 1

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David Leleu, Andreas Pfennig dleleu@uliege.be Products, Environment, and Processes (PEPs) Department of Chemical Engineering Université de Liège www.chemeng.uliege.be/Pfennig

Influence of Ions on the Coalescence Behavior

phoenix project Horizon 2020

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SLIDE 2

change due to trace components

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1 2 3 4 1 2 3 4 5 MIBK (d) + water (c), a = 5mm, f = 2 Hz, V = 20 l/h, T = 20 °C coalescence disperser cNaCl, aq exp. sim. mmol/l 25 75 position in measuring cell Sauter mean diameter in mm

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SLIDE 3

technical equipment

3

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SLIDE 4

stirring cell

4

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SLIDE 5

stirring-cell experiment

5 10 15 20 25 30 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18

stirring cell height in m time in s

sedimentation curve coalescence curve

5

settling time

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SLIDE 6

Coalescence model

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pcoal = 1− exp − tcontact tcoal tcontact ∝ d1+d2 vrelative Fdriving= Fbuoyancy Fturbulences Fhydrostatic_pressure dimple ∝ ቊ drops diameter deformed drops dimension

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SLIDE 7

10

  • 3

10

  • 2

10

  • 1

10 10

1

10

2

10

3

10

4

10

1

10

2

10

3

10

4

10

5

NaBr NaCl

c

Butanol-Phase [mol/m 3]

Settling times with salts added

7 butanol+water,

  • rganic/aqueous = 5/2

after Beusch

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SLIDE 8

Salt influence on the coalescence

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SLIDE 9

ions partitions: one single salt

Na+ Na+ Na+ Na+ Na+ Na+ Na+ Na+ Cl- Cl- Cl- Cl- Cl- Cl- Cl- Cl- Na+ Na+ Na+ Na+ Na+ Na+ Na+ Na+ Cl- Cl- Cl- Cl- Cl- Cl- Cl- Cl- 9

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SLIDE 10

Albertsson model

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ln ln

i i i

z F K K RT    

 

ln

A B A B

K RT z z F K    

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SLIDE 11

electrostatic potential measurement

dye Na+ Na+ Na+ Na+ Na+ Na+ Na+ Na+ Cl- Cl- Cl- Cl- Cl- Cl- Cl- Cl- dye dye dye Na+ Na+ Na+ Na+ Na+ Na+ Na+ Na+ Cl- Cl- Cl- Cl- Cl- Cl- Cl- Cl- dye dye 11

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SLIDE 12

Albertsson model

12

ln

I dye II dye dye

K RT z F K    

dye Na+ Na+ Na+ Na+ Na+ Na+ Na+ Na+ Cl- Cl- Cl- Cl- Cl- Cl- Cl- Cl- dye dye dye NH4

+

NH4

+

Cl- Cl- Cl- Cl- Cl- Cl- Cl- Cl- dye dye NH4

+

NH4

+

NH4

+

NH4

+

NH4

+

System I System II

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SLIDE 13

experimental data: partition coefficient

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0.001 0.01 0.1 1 10 100 1

NaNO3 NaCl NH4Cl Kdye Ccation in mmol/kg T = 298.15 K MgSO4

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SLIDE 14

salt influence on the settling behavior

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  • 40
  • 30
  • 20
  • 10

10 40 60 80 100 120 140 160

NH4Cl NaCl MgSO4 settling time in s in mV NaNO3 T = 298.15 K

  • /w: 1/2
  • /w: 2/1
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SLIDE 15

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David Leleu, Andreas Pfennig dleleu@uliege.be Products, Environment, and Processes (PEPs) Department of Chemical Engineering Université de Liège www.chemeng.uliege.be/Pfennig

Influence of Ions on the Coalescence Behavior

phoenix project Horizon 2020