Inorganic Membranes: Multi-layer Synthesis and Transport Properties
Saturday, July 17, 2010
Henk Verweij - Ohio State University
, e-mail Henk Verweij
This workshop will cover the most important inorganic membrane types, their application, chemical structure and morphology at several length scales. We will emphasize prevalent synthesis methods for multi-layer supported structures and their transport properties. This workshop should be of interest for R&D staff and students to obtain a detailed overview of current inorganic membrane promises and challenges.

1. Inorganic membranes (8-10:45 AM)
Representative dense and porous morphologies, chemical structure, applications, transport regimes.

2. Inorganic synthesis, colloidal processing, wet processing (10:45-12 and 1-2:30 PM)
Survey of wet-chemical and gas phase synthesis, precursor chemicals.
A. Colloids and colloidal stability.
B. Nano-particle synthesis, particle dispersion, removal of agglomerates.
C. Colloidal consolidation of membranes and supports

3. Introduction in multi-scale transport properties (2:30-5:15 PM)
Permeance as a function of pressure and thickness for dense structures and for porous layers in various transport regimes.
A. Dense membrane transport with species decomposing at the surface.
B. Micro-porous transport for dilute and concentrated cases.
C. Charge transport in solid electrolyte membranes.
D. Knudsen and specular gas transport.
E. Viscous compressible (gas) flow, mixed mode dusty gas model.
F. Ion retention by charged meso-porous structures.
G. Viscous incompressible (liquid) flow with and without boundary slip.

Guidelines for estimating overall multi-layer permeance.

Henk Verweij has more than 30 years experience in industry and academia in colloidal and thermal processing of inorganic materials and their transport properties. At Philips Research Laboratories he studied amorphous materials, development of dense ultrapure ceramics, and insulating materials. As a chaired professor at Twente University, The Netherlands, and after that Ohio State University, USA, he conducted research in fabrication of homogeneous and stable microstructures, several supported dense and porous membrane concepts for isomer, CO2, H2, and O2 separation, and water purification.

Nieck E. Benes is a staff member of the Membrane Technology Group of the University of Twente in The Netherlands ( Preceding affiliations include the Process Development Group of the Eindhoven University of Technology and DSM Base Chemicals R&D. Dr. Benes received his PhD degree from the University of Twente, on the subject "Mass transport in thin supported silica membranes". Current research activities revolve around the analysis of thin films that allow selective manipulation of multi-component mass transport. Main research themes are 1) fundamental studies of the superimposed effects of penetrant presence, length scale and timescale on materials properties of thin (< 200 nm) polymer films, and 2) the application of membranes under demanding conditions, In both research themes detailed understanding of multi-component mass transport is essential.