Abstract
ZSM-5 has been synthesized at 90 and 130°C in reactor systems in which reagents were supplied continuously, and homogeneous product slurry was withdrawn semicontinuously. In some cases, precursor crystals were nucleated in situ, whereas other preparations started from dispersions of seed crystals. Guided by a simple mathematical model, conditions were chosen to give a steady, near-linear crystal growth regime. The crystals grew from solution in a medium free of solid gel in which the predominant source of nutrient silica was the monomeric monoanion [(HO) 3SiO] −. The products were well formed, of high crystallinity, and of narrow crystal size distribution. By providing a means for regulating solution composition and effective supersaturation, the experimental method allowed direct control over nucleation and growth processes and of the radial composition of the resulting crystals. Continuous methods of zeolite synthesis provide a versatile preparative tool and a powerful technique for studying crystallization behavior.
Published Version
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.
