Highly Viscous Systems Maria C. Quaresima, Markus Schmidt, Andreas - PowerPoint PPT Presentation

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 1

agenda  motivation  extraction column design  single-drop behavior  sedimentation  mass transfer  conclusions and perspectives 2

motivation  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 and simulations 3

the ReDrop concept 4

ReDrop simulation 5

single-drop sedimentation DN 200 100 100 camera 100 2800 1350 100 100 rising droplet 50 50 50 50 nozzle for producing droplets 6

sedimentation EFCE system 140 120 terminal velocity in mm/s 100 ideally mobile interface 80 rigid interface 60 40 T = 20 °C, n-butylacetate (d) + water (c) without mass transfer, Hoting (1996) 20 our experiments 0 0 1 2 3 4 5 6 7 drop diameter in mm M. Henschke, A.Pfennig, AIChE J ., 45, 10 (1999). 7

single-drop sedimentation 140 oscillating drop deformed drop rigid drop circulating terminal velocity in mm/s 120 drop 100 a 16 a 15 80 60 40 d SW 20 α SW 0 0 1 2 3 4 5 6 7 drop diameter in mm M. Henschke, A.Pfennig, AIChE J ., 45, 10 (1999). 8

single-drop sedimentation 4 adjustable parameters: d SW a 15 a 16 α SW system α SW Henschke d: n-butyl acetate 10 c: water d: isododecane + D2EHPA Kalem et al. 2 c: water + Zn + H2SO4 Adinata d: toluene + paraffin 5 c: water + PEG 9

increasing viscosity of EFCE system continuous phase dispersed phase water n-butyl acetate + polyethylene glycol + paraffin oil (PEG) acetone 10

sedimentation velocity d: n-butyl acetate, sedimentation velocity in mm/s 90 viscosity 0.797 mPas c: water + PEG, 75 viscosity 7.928 mPas Henschke model T=20 ° C 60 45 α SW d SW 30 low viscous 10 2.39 system 15 this system 5.44 4.28 0 0 2 4 6 drop diameter in mm 11

single-drop mass transfer 12

ATPS mass transfer 1 exp calc diameter 1.24 mm 1.42 mm 1.56 mm + concentration difference y dimensionless driving 0.9 c: phosphate buffer, viscosity 2.145 mPas d: PEG, viscosity 9.250 mPas mass-transfer component: protein albumin 0 10 20 30 40 50 60 70 residence time in s F. Buchbender, M. Schmidt, T. Steinmetz, A. Pfennig, 13 Chem. Ing. Tech ., 84, (4) 540-546 (2012)

conclusions and perspectives  viscosity influence on mass transfer  fitting of models parameter  further investigation of viscosity dependency  implementing adapted models in simulation 14

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 15