English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

The synthesis of zeolites from dry powders

MPS-Authors
/persons/resource/persons58966

Schmidt,  W.
Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität Mainz;
Institut für Brennstoffchemie und physikalisch-chemische Verfahrenstechnik der RWTH Aachen;
Research Group Schmidt, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

/persons/resource/persons59145

Zibrowius,  B.
Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität Mainz;
Institut für Brennstoffchemie und physikalisch-chemische Verfahrenstechnik der RWTH Aachen;
Service Department Farès (NMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

/persons/resource/persons58985

Schüth,  F.
Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität Mainz;
Institut für Brennstoffchemie und physikalisch-chemische Verfahrenstechnik der RWTH Aachen;
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

Locator
There are no locators available
Fulltext (public)
There are no public fulltexts available
Supplementary Material (public)
There is no public supplementary material available
Citation

Althoff, R., Reitmaier, S., Schmidt, W., Zibrowius, B., Unger, K., & Schüth, F. (1995). The synthesis of zeolites from dry powders. Studies in Surface Science and Catalysis, 98, 36-37. doi:10.1016/S0167-2991(06)81074-8.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-1E09-E
Abstract
ZSM-5 was synthesized by different methods with a gradually decreasing water content ending in a reaction mixture with absolutely dry reagents in form of a powder in the complete absence of a solution phase. Amorphous precursors obtained by drying SiO2*Al2O3 gels at 650°C were transformed into zeolites in the presence of dried NH4F and TPABr. The reaction products were characterized by XRD, REM, TG/DTA, MAS NMR and Electron Micropobe. Pure ZSM-5 or Silicalite-1 was obtained in all cases. Some water is probably formed as a reaction product, but the maximum water pressure is appreciably below the saturation pressure at the given reaction conditions. To explain the formation of a zeolite, we suggest a vapor phase mass transfer process with SiF4 as the mobile species between the solid phase which contains the amorphous Si/Al-precursor and the formed zeolite.