Effect of flow-rate on ethanol separation in membrane distillation process
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Marek Gryta
Abstract
The separation of diluted ethanol solutions and fermentation broths by membrane distillation was investigated. The influence of stream flow-rate on the ethanol flux was studied. An evaluation of the process conditions on the separation degree of ethanol was performed with the application of hydrophobic capillary membranes composed of polypropylene. By removing the alcohol via membrane distillation, it is possible to achieve a higher content of ethanol in the permeate than that in the broth. The enrichment coefficient amounted to 4–6.5, and decreased with an increase of the ethanol concentration in the broth. It was found that the flow-rate affects the value of the enrichment coefficient. A positive influence of carbon dioxide on the ethanol transport through the capillary membrane was observed. The evolution of CO2 bubbles from the broth increases the stream turbulence, probably enhancing the alcohol concentration in the layer adjacent to the membrane surface.
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© 2013 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Evaluation of waste products in the synthesis of surfactants by yeasts
- Investigation of CO2 and ethylethanolamine reaction kinetics in aqueous solutions using the stopped-flow technique
- Alkali pre-treatment of Sorghum Moench for biogas production
- Modelling of kinetics of microbial degradation of simulated leachate from tobacco dust waste
- Model predictive control-based robust stabilization of a chemical reactor
- Decomposition of meta- and para-phenylphenol during ozonation process
- Treatment of effluents from a membrane bioreactor by nanofiltration using tubular membranes
- Zeolite and potting soil sorption of CO2 and NH3 evolved during co-composting of grape and tobacco waste
- Liquid-solid equilibrium for the NaCl-NaHCO3-Na2CO3-H2O system at 45°C. Validation of mixed solvent electrolyte model
- Investigation of turbulent flow field in a Kenics static mixer by Laser Doppler Anemometry
- Effect of flow-rate on ethanol separation in membrane distillation process
- Preparation of aluminium ammonium calcium phosphates using microwave radiation
- Continuous dehydrochlorination of 1,3-dichloropropan-2-ol to epichlorohydrin: process parameters and by-products formation
- Preparation of sterically stabilized gold nanoparticles for plasmonic applications
- Synthesis and spectroscopic characterisation of (E)-2-(2-(9-(4-(1H-1,2,4-triazol-1-yl)butyl)-9H-carbazol-3-yl)vinyl)-3-ethylbenzo[d]thiazol-3-ium, a new ligand and potential DNA intercalator
- Microwave-assisted oxidation of alcohols by hydrogen peroxide catalysed by tetrabutylammonium decatungstate
- Dynamic shape and wall correction factors of cylindrical particles falling vertically in a Newtonian liquid
- Selective oxidation of metallic single-walled carbon nanotubes
