|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
|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.
|URI:||http://hdl.handle.net/11420/9414||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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