Characterization studies in microporous silica membranes

Name: Characterization studies in microporous silica membranes
Brand: VDM Verlag
SKU: 9783639169881
Price: 405.95 RON
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Autor: Lawrence M. Wagg

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Current efforts to design more efficient gas§separation membranes are hampered by an incomplete§unde...

Informații despre carte

Autor

Lawrence M. Wagg

Limbă

engleză

Legare

Carte - Carte broșată

Publicat

2009

Pagini

260

EAN

9783639169881

ISBN

3639169883

Enbook ID

06825332

Editura

VDM Verlag

Greutate

386

Dimensiuni

152 x 229 x 15

Descriere completă

Current efforts to design more efficient gas§separation membranes are hampered by an incomplete§understanding of material structure and of the§microscopic features that control gas diffusion in§membranes. In this study we seek to develop§techniques to characterize these features, and to§study the effects of thermal treatment on the§properties of§microporous silica membranes. We make the important§distinction between traditional characterization§techniques, which characterize void space, and size§exclusion experiments that probe the small subset of§features that actually control diffusion. The§results of size exclusion, gas adsorption, 129Xe NMR,§and transport experiments are combined to propose a§model of the amorphous microporous silica structure.§Thermal treatment is found to have almost no effect§on void space, while profoundly affecting transport§rates. We attribute the transport changes to the§removal of water from the system, which increases§pore interconnectivity thereby allowing alternate§diffusion pathways.

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Characterization studies in microporous silica membranes

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