A Comparative Study of Template Removal from Silicate-1 Crystals in Pyrolytic and Oxidizing Regimes.

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F02%3A54020143" target="_blank" >RIV/61388955:_____/02:54020143 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—

Result language
angličtina
Original language name
A Comparative Study of Template Removal from Silicate-1 Crystals in Pyrolytic and Oxidizing Regimes.
Original language description
The removal of tetrapropylammonium cations (TPA+) from silicalite-1 crystals with a morphology of 90.DEG.-intergrowth and different crystal sizes was investigated. The effects of the nature of the gas (air or nitrogen) and of the hydrodynamics were examined using a stream flowing in parallel or across the crystal layer. The only process variable was the plateau temperature (Tmax). Crystal domain boundaries became permeable to template degradation products when Tmax exceeded 300 .DEG.C. The template removal was monitored by (i) light microscopy, (ii) degree of removal of the total organics , of nitrogen species N and of carbon species C and (iii) accessibility of the channel system for N2 molecules. The sorption isotherms for N2 exhibited two steps. Theupper step started to be perceptible for a degree of organic removal higher than 55. Its height increased with , and its position moved to lower pressure values. The plots of gas accessibility versus the degree of removal were modelled.
Czech name
—
Czech description
—

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
—

Project
<a href="/en/project/GA203%2F99%2F0522" target="_blank" >GA203/99/0522: Composites of microporous materials for membrane separation of species and related applications</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2002
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)