Solvent Extraction Design for Highly Viscous Systems

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Solvent Extraction Design for

Highly Viscous Systems

Maria C. Quaresima, Markus Schmidt, Andreas Pfennig mariachiara.quaresima@uliege.be

Products, Environment, and Processes (PEPs) Department of Chemical Engineering

Université de Liège, Belgium www.chemeng.uliege.be

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agenda



motivation



extraction column design



single-drop behavior



sedimentation



mass transfer

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motivation

3



sources: fossil-based

bio-based



higher oxygen content



lower vapor pressure



higher viscosity



pilot-plant based design is time consuming,

expensive



design based on lab-scale experiments

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ReDrop simulation

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single-drop sedimentation

2800 1 0 0 1 0 0 5 0 DN 200 camera

nozzle for producing droplets rising droplet 1 3 5 0 5 0 5 0 5 0 1 0 0 1 0 0 1 0 0

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sedimentation EFCE system

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M. Henschke, A.Pfennig, AIChE J., 45, 10 (1999).

0 1 2 3 4 5 6 7 0 20 40 60 80 100 120 140 rigid interfac e idea lly m obile inte rfac e T = 20 °C, n-butylacetate (d) + water (c) without mass transfer, Hoting (1996) our experiments

te

rm

in

a

l v

e

lo

ci

ty

in

m

/s

drop diameter in mm

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single-drop sedimentation

rigid drop circulating drop

oscillating drop deformed drop

d

_SW

_α

SW

a

₁₆

a

₁₅ 0 1 2 3 4 5 6 7 0 20 40 60 80 100 120 140

te

rm

in

a

l

ve

lo

ci

ty

in

m

/s

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single-drop sedimentation

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4 adjustable parameters: d

_SW

a

₁₅

a

₁₆

α

_SW

system

α

_SW

Henschke

d: n-butyl acetate

c: water

10 Kalem et al. d: isododecane + D2EHPA

c: water + Zn + H2SO4

2 Adinata

d: toluene + paraffin

c: water + PEG

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increasing viscosity of EFCE system

continuous phase

dispersed phase

water

n-butyl acetate

+ polyethylene glycol

(PEG)

+ paraffin oil

acetone

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sedimentation velocity

11

α

_SW

d

_SW low viscous system

10

2.39

this system

_{5.44 4.28}

d: n-butyl acetate, viscosity 0.797 mPas c: water + PEG, viscosity 7.928 mPas T=20°C

Henschke model

0 2 4 6 0 15 30 45 60 75 90

s

e

d

im

e

n

ta

tio

n

v

e

lo

c

ity

in

m

/s

drop diameter in mm

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ATPS mass transfer

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F. Buchbender, M. Schmidt, T. Steinmetz, A. Pfennig,

Chem. Ing. Tech., 84, (4) 540-546 (2012)

0 10 20 30 40 50 60 70 0.9 1 D_d= 9,97E-15 m2/s C_IP=4,63E5 di m en si on le ss d riv in g co nc en tr at io n di ffe re nc e y + residence time in s

exp calc diameter 1.24 mm 1.42 mm 1.56 mm

c: phosphate buffer, viscosity 2.145 mPas d: PEG, viscosity 9.250 mPas

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conclusions and perspectives



viscosity influence on mass transfer



fitting of models parameter



further investigation of viscosity

dependency



implementing adapted models in

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