New Findings and Properties of UF&NF Membranes in the Separation of Novel Products
A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Applications".
Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 530
Special Issue Editor
Interests: characterization and modification of polymer membranes; synthesis and characterization of emulsion polymerization; isolation and cleaning of aromatic and natural products and active components; down-stream processing of natural and synthesised products
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues，
Due to the increased energy costs, processes for the production and reprocessing of different products, which, for example, require a large amount of thermal energy for the separation of by-products or concentration, are coming under pressure to find and use less energy-intensive alternative separation processes. The aim is to reduce the proportion of fossil fuels in the manufacturing processes and thus also the associated CO2 emissions.
Pressure-driven membranes like NF- and UF-membranes show great potential in their application as an alternative to thermal separation processes.
NF and UF differ in their pore sizes, whereby NF has pores in the range of a few nm and UF in turn has pores from a few nm upwards to in the range of 50 to 100 nm. There is also a transition area from NF to UF, in which membranes either show NF separation behaviour or exhibit properties characteristic of UF in the separation process.
Different mechanisms describe the selectivity of NF or UF membranes for various complex separation tasks. The further development of prediction concepts and suitable descriptions is the focus of this special issue, which aims to deepen the fundamental understanding of the predominant phenomena of NF and UF processes.
In contrast, the dielectric exclusion mechanism according to Donnan, charge effects near the membrane surface in NF or exclusion effect according to molecular masses or molecular sizes in UF with and without charge effects and hydration describe the retention effect in the separation process.
Prof. Dr. Wolfgang Samhaber
Guest Editor
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Keywords
- NF-membrane
- UF-membrane
- pressure-driven membrane
- processing
- product separation
- recovery
- alkaline, acidic, solvent containing liquors
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