RESEARCH

Porous Ceramic Membranes
Chemically modifying ceramic membranes on the (sub)nanometer scale for separation applications under demanding conditions, with focus on:

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Polymer-functionalized ceramic membranes for solvent nanofiltration

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Zeolitic- or solgel-derived ceramic membranes for gas separation

For more information contact:
Prof.dr A.J.A. (Louis) Winnubst

Solid State Ionics
Research within this theme encompasses the study of fast ionic and mixed ionic-electronic transport in condensed phases and associated interfacial/electrode reactions. Essential to the research is the development of a fundamental understanding of the relationships between material characteristics, such as crystal structure, composition, defect chemistry and microstructure, and material properties related to diffusion of ionic and electronic species. Main interest is focused to the fundamentals of technological applications, such as dense ceramic membranes and the solid oxide fuel cell (SOFC).

For more information contact:
Prof.dr H.J.M. (Henny) Bouwmeester

Films in Fluids

Research in this group revolves around two major topics: 

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The development of (ultra)thin hybrid films

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The characterisation of thin films that are exposed to (high-P, high-T, chemically aggressive) fluids

For more information contact:
Prof.dr.ir N.E. (Nieck) Benes

Topics of current interest are:

Hybrid inorganic-organic membranes for SRNF

Evelien Maaskant

Solvent resistant nanofiltration (SRNF) is a technology with great potential for environmentally benign separation of small molecules from organic solvents. Existing membranes for OSN in general suffer from insufficient chemical robustness, low fluxes, and low selectivity. In this project hybrid inorganic-organic membranes for SRNF will be developed. The selectivity of these membranes originates from an ultrathin film of a hyper-cross-linked network on top of a porous support. The macromolecular design of this network will be optimized for application in OSN by using a toolbox containing various bridges and network formers. By tuning these elements from the toolbox, the membranes properties could be adjusted to the desired application.

Oxygen transport membrane materials for the oxyfuel process

Rian Ruhl

In the oxyfuel process, oxygen transport membranes are required to replace the current air separation units. In general, membrane materials with a high oxygen flux have a low chemical stability in the flue gas atmosphere, while those that are chemically stable do not show a good oxygen flux. This project is aimed at optimizing both parameters at once, as well as understanding their mutual relation better. Electrochemical measurements and structural characterizations are carried out to relate the structure of a membrane material to all kinds of properties.

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In-situ characterisation of SRNF membranes

Kristianne Tempelman

The penetrant-induced swelling of membranes has dramatic negative effects on their separation performance. These effects are particularly strong in the case of very thin films. The aim of this research is to understand the fundamentals underlying the performance of membranes in order to establish chemistry-structure-performance relations that aid membrane materials design optimized for SRNF.

Inorganic porous hollow fibers

Patrick de Wit

Inorganic porous hollow fibers are a promising type of membranes because of their high surface-to-volume ratio. In this project the aim is to fabricate inorganic porous hollow fibers tailored for specific applications. The project comprises both the fabrication (using novel, green techniques) and characterization of the prepared fibers.