Is the formation of a zeolite from a dry powder via a gas phase transport 
process possible?

Althoff, R.; Unger, K.; Schüth, F.

doi:10.1016/0927-6513(94)E0027-R

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Is the formation of a zeolite from a dry powder via a gas phase transport process possible?

MPS-Authors

/persons/resource/persons58985

Schüth, F.
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Althoff, R., Unger, K., & Schüth, F. (1994). Is the formation of a zeolite from a dry powder via a gas phase transport process possible? Microporous and Mesoporous Materials, 2(6), 563-564. doi:10.1016/0927-6513(94)E0027-R.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-3E80-3

Abstract

ZSM-5 was synthesized by four methods with a gradually decreasing water content ending in a reaction mixture with absolutely dry reagents in the form of a powder in the complete absence of a solution phase. Amorphous precursors obtained by drying SiO₂.A₂O₃ gels at 650°C were transformed into zeolites in the presence of dried NH4F and TPABr. Some water is probably formed as a reaction product, but the maximum water pressure is appreciably below the saturation pressure under 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 zeolite formed.