Laboratory of Fluid Separations TU Dortmund University

Transcription

1 Laboratory of Fluid Separations TU Dortmund University Andrzej Górak FVT, TU Dortmund Delft,

2 Technical University of Dortmund 16 departments > students 13 laboratories ~ 100 scientific assistants Andrzej Górak Delft,

3 Department of Biochemical and Chemical Engineering Process Intensification Sustainable Chemical and Biochemical Engineering Polymer Science and Engineering Model-Based Design and peration Andrzej Górak Delft,

4 Laboratory of Fluid Separations Head: Prof. Dr.-Ing. A. Górak Two working groups: P. Lutze, T. Zeiner Professors: 1 Secretary: 2 Senior researcher: 2 PhDs: 16 Assistant lecturer: 2 Technical staff: 4 Students: > 24 70% of all projects as collaborative research 70% of PhD students are supported by third-party funds Andrzej Górak Delft,

5 Research Topics Reactive Separations Membrane Reactors Reactive Distillation Reactive Absorption Reactive Extraction Nanofiltration Bioextraction & Membrane Adsorption Downstream Processing (Hybrid) Bioseparations Methods Distillation Absorption Extraction Membranes Detailed Mathematical Modeling Generic Process Development Using Detailed Models Hybrid Separations Process ptimization Process Simulations (steady-state and dynamic) Extraction & Membranes Extraction & Crystallization (Reactive)Distillation & Membranes Distillation & Crystallization Andrzej Górak Delft,

6 Reactive Separations: Modelling Concept Equilibrium Stage Model Rate-Based Model Sorel E., Rectification de l Alcool (1893) Taylor R., Krishna R., Chem. Eng. Sci. 55 (2000) C. Noeres, E. Y. Kenig, A. Górak, Chem. Eng. Process. (2003) Gas phase Liquid phase Gas phase Liquid phase Gas and liquid phase in equilibrium Efficiency factor to consider the influence of column internals Packing: HETP Tray: η (Tray efficiency) Reaction in bulk phase nly interface in equilibrium Interfacial area and mass transfer coefficient for different column internals Reaction in film and bulk phase Influence of reaction on mass transfer rate Andrzej Górak Delft,

7 Reactive Separations: Modelling Concept micro kinetics Reaction overall kinetics equilibrium Kenig E.Y., Schneider R., Górak A., Chem. Eng. Sci. (2001) equilibrium stage model Mass transfer Andrzej Górak Delft,

8 Experimental Facilities (Reactive) distillation column DN 50 Continuously operated (reactive) distillation Made of glass Inner diameter 50 mm, total height 12 m Effective packing height 5,8 m Investigation of heterogeneous and homogeneous catalysed reactions Possibility of vacuum distillation ptional use of liquid-liquid phase separator Andrzej Górak Delft,

9 RD research fields at FVT Examples of current investigated reactive distillation (RD) processes inhibitor inhibitor Production of n-butyl acrylate n-butanol n-butyl acrylate acrylic acid n-butanol n-butanol, water Reactive zone Hybrid process: Production of DMC Selectivity control in multiple product systems: Production of EMC and DEC catalyst acrylic acid reactor reactor purge n-butyl acrylate, acrylic acid Andrzej Górak Delft,

10 Production of n-butyl acrylate Synthesis of n-butyl acrylate from acrylic acid and n-butanol AA + BuH BA + Water Equilibrium-limited reaction Homogeneous catalysed reaction Process intensification using catalytic distillation? Niesbach A., Fuhrmeister R., Keller T., Lutze P., Górak A. Ind. Eng. Chem. Res. (2012) Andrzej Górak Delft,

11 Production of n-butyl acrylate Conventional process Potential RD-process Complex and cost-intensive process Homogeneous catalyst 1 RD column Heterogeneous catalyst Andrzej Górak Delft,

12 Production of n-butyl acrylate Experimental challenge Polymerisation tendency of components Conduction of experiments for model validation Educt Ratio D/F RR p Process optimisation using validated model Andrzej Górak Delft, Niesbach A. et al. Ind. Eng. Chem. Res. (2012) 12

13 Hybrid process: Production of DMC Transesterification of propylene carbonate with methanol Propylene carbonate Methanol Dimethyl carbonate 1,2-Propanediol Characteristics of chemical system Equilibrium limited transesterification reaction (K eq = 0.2) Use of sodium methoxide as homogeneous transesterification catalyst Holtbruegge J., Lutze P., Gorak A., PSE (2012) Andrzej Górak Delft,

14 Hybrid process: Production of DMC Benchmark process Hybrid process 1 continuous reactor 1 reactive distillation column 4 distillation columns including pressure 1 vapour permeation swing distillation membrane Separation of DMC/MeH-azeotrope using 1 distillation column for pressure swing distillation purification of DMC Hybrid: Savings in capital and operational costs Andrzej Górak Delft, Holtbruegge J., Lutze P., Gorak A., PSE (2012) 14

15 Multiple product system: Production of EMC/DEC 1 product system Reactive distillation (RD) is already applied in the chemical industry for single-product systems 2 (potential) product system nly a few studies appeared on the application of RD for multiple-product systems R 1 + R 2 H H R + H 2 2 R 1 H H R 1 R 1 + R 2 H H H R + H 2 2 R 2 H R R R R H 2 R 1 Single desired product is formed RD leads to higher conversion Potential of RD not fully tapped Multiple desired products are formed RD allows one to vary the selectivity Can a RD-column work as multipurpose reactor? Keller T., et al. Ind Eng Chem Res (2011); Keller T, Holtbruegge J, Gorak A. Chem Eng J (2012) Andrzej Górak Delft,

16 Multiple product system: Production of EMC/DEC Generation of experimental data perating point 1: selective production of ethyl methyl carbonate (EMC) perating point 2: selective production of diethyl carbonate (DEC) Change of operating parameters perating point 1 perating point 2 P1 P2 Reflux ratio [-] Distillate-to-feed ratio [kg/kg] Molar feed ratio [mol/mol] Mass fraction of catalyst [%] Keller T., Holtbrügge J., Górak A. Gas liquid and gas solid reactor engineering congress (2011) Potential of reactive distillation column to act as a multipurpose reactor verified Andrzej Górak Delft,

17 Multiple product system: Production of EMC/DEC Catalyst screening Homogeneous catalyst: sodium ethoxide ptimisation study ptimisation tool: Evolutionary algorithm Multiobjective optimization based on the weighted sum method fitness = w S + w X MIN S, EMC EMC X, DMC DMC Keller T. et al. Ind. Eng. Chem. Res. (2011); Keller T., Holtbrügge J., Górak A. Gas liquid and gas solid reactor engineering congress (2011) Andrzej Górak Delft,

18 Thank you for your attention! Andrzej Górak Delft,