Distillation contra pervaporation: Comprehensive investigation of isobutanol-water separation

Anita Andre, Tibor Nagy, Andras Jozsef Toth, Eniko Haaz, Daniel Fozer, Janka Ariella Tarjani, P. Mizsey

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Different research works demonstrate that the pervaporation can replace the distillation or deliver better solutions. It should be, however, accepted with criticism. In our case study, isobutanol-water separation is studied since it is increasingly important in the field of biofuels and process wastewater treatment. There are many options for the separation and they differ in their efficiency, economic features, robustness, development level and environmental impact. Five separation structures are investigated using distillation, both organophilic and hydrophilic pervaporations and hybrid separation units consisting of distillation and pervaporation including heat integrated solutions. The different alternatives are modelled in professional flowsheeting environment. Life cycle assessment, energy evaluation and Multi-Criteria Decision Analysis (MCDA) based on PEST (Political, Economic, Social, and Technological) analysis are completed to evaluate and compare the five alternatives. The feed stream to be separated has the composition of 7 wt% isobutanol 93 wt% water that corresponds to the mixture of the phase split due to the limited solubility. Two product purities are considered, 98.8 and 99.9 wt%. In case of distillation processes, heat integration is also considered, that is, the feed is preheated with its bottom flow. Heat integration significantly improves the efficiency of the distillation and makes it for practically a competitive alternative. The best efficiency can be obtained with heat integrated hybrid separation, that is, the combination of distillation and pervaporation. The pure pervaporation that is the combination of organophilic and hydrophilic pervaporation can be efficient only at sloppy product purities because of the modest separation factor of the organophilic pervaporation membranes. In case of sharp separations, the organophilic pervaporation can be an equally applicable solution as the azeotropic distillation for isobutanol-water separation.

Original languageEnglish
Pages (from-to)804-818
Number of pages15
JournalJournal of Cleaner Production
Volume187
DOIs
Publication statusPublished - Jun 20 2018

Fingerprint

Pervaporation
distillation
Distillation
Water
water
development level
Economics
decision analysis
Decision theory
research work
Biofuels
economics
biofuel
Wastewater treatment
Environmental impact
Life cycle
solubility
environmental impact
life cycle
Solubility

Keywords

  • Heat integration
  • Hybrid distillation-pervaporation
  • Isobutanol-water separation
  • Life cycle assessment
  • Multi-criteria decision analysis

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Strategy and Management
  • Industrial and Manufacturing Engineering

Cite this

Distillation contra pervaporation : Comprehensive investigation of isobutanol-water separation. / Andre, Anita; Nagy, Tibor; Toth, Andras Jozsef; Haaz, Eniko; Fozer, Daniel; Tarjani, Janka Ariella; Mizsey, P.

In: Journal of Cleaner Production, Vol. 187, 20.06.2018, p. 804-818.

Research output: Contribution to journalArticle

Andre, Anita ; Nagy, Tibor ; Toth, Andras Jozsef ; Haaz, Eniko ; Fozer, Daniel ; Tarjani, Janka Ariella ; Mizsey, P. / Distillation contra pervaporation : Comprehensive investigation of isobutanol-water separation. In: Journal of Cleaner Production. 2018 ; Vol. 187. pp. 804-818.
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