Publisher DOI: 10.1016/j.ces.2021.116650
Title: Model-based evaluation of a membrane-assisted hybrid extraction-distillation process for energy and cost-efficient purification of diluted aqueous streams
Language: English
Authors: Scharzec, Bettina 
Kruber, Kai Fabian 
Skiborowski, Mirko 
Keywords: Aqueous diluted solutions;Hybrid;Membrane;Process optimization;γ-valerolactone
Issue Date: 31-Aug-2021
Source: Chemical Engineering Science 240: 116650 (2021-08-31)
Journal or Series Name: Chemical engineering science 
Abstract (english): 
The concentration of diluted aqueous streams is an important task in bio-based production processes, as well as the recovery of valuable impurities prior to wastewater purification. Affinity-based separation processes, such as liquid-liquid extraction, are generally considered favorable to distillation, which however is regularly used for solvent recovery. To reduce the effort for a solvent-based extraction and improve the economic performance, an extended hybrid process concept is considered, which exploits energy-efficient pressure-driven membrane separations, i.e. reverse osmosis or nanofiltration, for preconcentration. The current work presents a systematic evaluation of this process for purification of a diluted aqueous γ-valerolactone stream, considering two solvents. The potential economic savings are first evaluated in a model-based assessment prior to an experimental screening of suitable membranes. Finally, a detailed economic evaluation of the processes is conducted by an optimization-based process design. The proposed approach allows to quickly identify a considerable saving potential for the membrane-assisted hybrid process.
ISSN: 0009-2509
Institute: Systemverfahrenstechnik V-4 
Document Type: Article
Project: Entwicklung und Erprobung der integrierten Reaktion und Katalysatorabtrennung zur homogen katalysierten reduktiven Aminierung und Hydroaminomethylierung langkettiger Alkene in einer Miniplant (D03*) 
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