Template-free and alkali-free synthesized silicates with MFI structure

Wallau, M.; Schüth, F.; Brenner, A.; Melson, S.; Spichtinger, R.; Unger, K.; Tissler, A.; Zibrowius, B.

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Template-free and alkali-free synthesized silicates with MFI structure

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Wallau, M., Schüth, F., Brenner, A., Melson, S., Spichtinger, R., Unger, K., et al. (1993). Template-free and alkali-free synthesized silicates with MFI structure. In Proceedings from the Ninth International Zeolite Conference: Montreal (pp. 643-650). Boston: Butterworth-Heinemann.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-4511-8

Abstract

Zeolites and gallosilicates with an MFI-structure which were crystallized from inorganic reaction systems and from alkali-free, tetrapropylammonium bromide containing systems are compared. The strength, nature and distribution of the acidic sites were determined by FTIR-spectroscopy, TPD, electron microprobing, ²⁹Si, ²⁷Al and ¹H 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.