Abstract
The crystallization rates of [Al]- and [Ga]-MFI-type zeolites were studied at 170°C and autogeneous pressure. Samples were characterized by XRD, FTi.r. solid-state 27Al and 71Ga MAS n.m.r., and X.p.s. techniques. Results clearly show that the crystallization rate of [Ga]-ZSM-5 is much faster than that observed for [AI]-ZSM-5. Whereas [Ga]-ZSM-5 is synthesized in just 4 h, [AI]-ZSM-5 is synthesized in 40 h under the same conditions. This is probably due to the fact that, under alkaline conditions, free gallate ions are more stable than are aluminate ions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
