6533b7d8fe1ef96bd126b5fd

RESEARCH PRODUCT

TEMPLATE-FREE AND ALKALI-FREE SYNTHESIZED SILICATES WITH MFI-STRUCTURE -A COMPARATIVE STUDY

Bodo ZibrowiusR. SpichtingerA. BrennerA. TisslerS. MelsonK.k. UngerM. WallauFerdi Schüth

subject

Template freeMas nmr spectroscopyAlkali freeChemistryInorganic chemistryCatalysis

description

ABSTRACT Zeolites and gallosilicates with an MFI-structure which were crystallized from inorganic reaction systems and from alkali-free, tetrapropylammonlumbromide (TPABr) containing systems are compared. The strength, nature and distribution of the acidic sites were determined by FTIR-spectroscopy, TPD, electron microprobing, 29 si, 27 Al and 1 H MAS NMR spectroscopy. The influences of the different trivalent elements as well as the strength, type and distribution of the acidic sites on the catalytic performance of the different MFI-silicates are discussed.

yearjournalcountryeditionlanguage
1993-01-01
https://doi.org/10.1016/b978-1-4832-8383-8.50076-3