LAPSE:2020.0020
Published Article
LAPSE:2020.0020
Splitting Triglycerides with a Counter-Current Liquid−Liquid Spray Column: Modeling, Global Sensitivity Analysis, Parameter Estimation and Optimization
January 2, 2020
In this work we present the model of a counter-current spray column in which a triglyceride (tripalmitic triglyceride) is hydrolyzed by water and leads to fatty acid (palmitic acid) and glycerol. A finite volume model (FVM) of the column was developed to describe the reactive extraction process with a two-phase system and validated with an analytical model from the literature with the given data set encompassing six experimental runs. Global, variance-based (Sobol) sensitivity analysis allowed assessment of the sensitivity of the sweet water glycerol content in respect to liquid density, overall mass-transfer coefficient, reaction rate coefficient and the equilibrium ratio to rank them accordingly. Furthermore, parameter estimation with a differential evolution (DE) algorithm was performed to obtain among others the mass transfer, backmixing and reaction rate coefficients. The model was used to formulate and solve a process design problem regarding economic and sustainable performance. Multi-criteria optimization was applied via DE to minimize total annual cost (TAC) and the Eco99 indicator by varying the steam inlet flow rate and distribution over the two steam inlets as the independent variables. The model and analysis was implemented in Fortran and Python where the Fortran model can also be embedded in a process simulator such as PRO/II or Aspen.
Keywords
hydrolysis, Modelling, Optimization, parameter estimation, sensitivity analysis, spray column, vegetable oil
Suggested Citation
Jones MN, Forero-Hernandez H, Zubov A, Sarup B, Sin G. Splitting Triglycerides with a Counter-Current Liquid−Liquid Spray Column: Modeling, Global Sensitivity Analysis, Parameter Estimation and Optimization. (2020). LAPSE:2020.0020
Author Affiliations
Jones MN: Edible Oil System Business Unit, Alfa Laval Copenhagen A/S, 2860 Søborg, Denmark; Process and Systems Engineering Centre (PROSYS), Technical University of Denmark (DTU), Building 227, 2800 Kgs. Lyngby, Denmark [ORCID]
Forero-Hernandez H: Edible Oil System Business Unit, Alfa Laval Copenhagen A/S, 2860 Søborg, Denmark; Process and Systems Engineering Centre (PROSYS), Technical University of Denmark (DTU), Building 227, 2800 Kgs. Lyngby, Denmark [ORCID]
Zubov A: Department of Chemical Engineering, University of Chemistry and Technology Prague, Technicka 5, 16628 Prague, Czech Republic [ORCID]
Sarup B: Edible Oil System Business Unit, Alfa Laval Copenhagen A/S, 2860 Søborg, Denmark
Sin G: Process and Systems Engineering Centre (PROSYS), Technical University of Denmark (DTU), Building 227, 2800 Kgs. Lyngby, Denmark [ORCID]
Journal Name
Processes
Volume
7
Issue
12
Article Number
E881
Year
2019
Publication Date
2019-11-26
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr7120881, Publication Type: Journal Article
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LAPSE:2020.0020
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doi:10.3390/pr7120881
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Jan 2, 2020
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CC BY 4.0
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Original Submitter
Calvin Tsay
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