Process Energy Efficiency in Pervaporative and Vacuum Membrane Distillation Separation of 2,3-Butanediol

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DOIResolve DOI: http://doi.org/10.1002/cjce.20468
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TypeArticle
Journal titleCanadian Journal of Chemical Engineering
Volume89
Issue5
Pages12551265; # of pages: 11
Subjectpervaporation; vacuum membrane distillation; process energy efficiency; numerical model; product recovery; permeate recycling
AbstractThis work focused on the energy aspects of the pervaporative separation of 1-butanol/2,3-butanediol. A numeric model was developed to simulate the mass and energy balance of the pervaporation process. It was found that the distribution of evaporation heat requirement over the membrane area is asymmetric, and more than 85% of the heat was consumed in the 60% of the membrane area. It was also revealed that recycling the permeate having higher than 5% w/w 2,3-butanediol can improve the recovery of 2,3-butanediol, and thus enhance the process energy efficiency. Two recycling strategies (the single or multiple point admission of permeate to the retentate flow) were explored. The specific energy requirement (the heat required by generating 1 kg 99.5% w/w 2,3-butanediol as product) was proposed to evaluate the process energy efficiency of both the pervaporation and vacuum membrane distillation, and it was shown that pervaporation can bring about nearly four times energy savings over the vacuum membrane distillation.
Publication date
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology; National Research Council Canada
Peer reviewedYes
NRC number52245
NPARC number18589753
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Record identifier09131112-1b88-475c-9f67-50f6bfbbca6d
Record created2011-09-16
Record modified2016-05-09
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