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N-Propanol Dehydration with Distillation and Pervaporation: Experiments and Modelling
1Department of Chemical and Environmental Process Engineering, Environmental and Process Engineering Research Group, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary.
This study demonstrates an efficient pervaporation process for dehydrating n-propanol using PERVAP™ 1201 membranes. The hybrid system achieves 99.9% purity, outperforming traditional methods.
Area of Science:
- Chemical Engineering
- Separation Processes
Background:
- Fine chemical industry requires efficient separation of n-propanol from aqueous mixtures.
- Pervaporation offers a potential solution for dehydration using specialized membranes.
Purpose of the Study:
- To evaluate the effectiveness of PERVAP™ 1201 membranes for n-propanol dehydration.
- To model and optimize a hybrid distillation-pervaporation system for enhanced separation.
Main Methods:
- Experimental determination of pervaporation parameters (selectivity, flux).
- Calculation of the Membrane Flash Index (MFLI) for process comparison.
- Rigorous modeling and optimization of a hybrid system using ChemCAD and dynamic programming.
Main Results:
- PERVAP™ 1201 membranes effectively removed water from n-propanol-water mixtures.
- The Szilagyi and Toth model accurately described the pervaporation data.
- The hybrid system achieved 99.9% n-propanol purity with optimized theoretical stages and membrane area.
Conclusions:
- Pervaporation is a highly efficient method for n-propanol dehydration.
- The developed hybrid distillation-pervaporation process is novel and effective.
- The optimized system offers a superior alternative to flash distillation for this separation task.
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