University of Oulu

Jenna Hietaharju, Jani Kangas, Juha Tanskanen, Analysis of the permeation behavior of ethanol/water mixtures through a polydimethylsiloxane (PDMS) membrane in pervaporation and vapor permeation conditions, Separation and Purification Technology, Volume 227, 2019, 115738, ISSN 1383-5866, https://doi.org/10.1016/j.seppur.2019.115738

Analysis of the permeation behavior of ethanol/water mixtures through a polydimethylsiloxane (PDMS) membrane in pervaporation and vapor permeation conditions

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Author: Hietaharju, Jenna1; Kangas, Jani1; Tanskanen, Juha1
Organizations: 1Chemical Process Engineering, University of Oulu, P.O. Box 4300 FI-90014, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2019082725806
Language: English
Published: Elsevier, 2019
Publish Date: 2021-06-25
Description:

Abstract

In this study the interactions between ethanol and water penetrating in a supported polydimethylsiloxane membrane were investigated both using experimental and mathematical modelling work. To reach comprehensive analysis of the membrane performance and the penetrant interactions, the experimental work included a wide range of pervaporation and vapor permeation experiments with pure and binary ethanol-water mixtures. A Maxwell-Stefan model was used to further analyze the membrane performance with a Flory-Huggins formulation to describe the sorption behavior. According to the formed model, both water and ethanol permeation are slowed down from the permeation rates observed with pure feeds and in binary permeation especially the experimental ethanol flux is lower than the flux expected by the model. This suggests that the interactions between the penetrants in PDMS are high resulting to decreased diffusion rate of both ethanol and water.

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Series: Separation and purification technology
ISSN: 1383-5866
ISSN-E: 1873-3794
ISSN-L: 1383-5866
Volume: 227
Article number: 115738
DOI: 10.1016/j.seppur.2019.115738
OADOI: https://oadoi.org/10.1016/j.seppur.2019.115738
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
Subjects:
Funding: The experimental work was done as a part of the ‘Sustainable production concepts on integrated biorefining industry’ project (decision number 286633) financed by the Academy of Finland (Finland). The work was supported by grants from Emil Aaltonen Foundation (Finland) and Tauno Tönning Foundation (Finland). The help received from Center of Microscopy and Nanotechnology, University of Oulu in membrane sample preparation and microscopic analysis is highly appreciated.
Academy of Finland Grant Number: 286633
Detailed Information: 286633 (Academy of Finland Funding decision)
Copyright information: © 2019 Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
  https://creativecommons.org/licenses/by-nc-nd/4.0/