I have synthesized some compounds by different variations of Si/Al, OH/Si, H2O/Si, temperature, condition (tumbling and non-tumbling) but I got almost the type of mordenite. There is also ZSM-5 but still has other phase (low crystallinity).
Halo Saeideh, thanks a lot. Please send me the first article because i can't download it. My email is [email protected]
I synthesized organic free MFI-type materials. I forget the specific recipes but they were near 50 < SiO2/AlO2- < 150 and 0.1 < NaOH/SiO2 < 0.2 and H2O/SiO2 = 20. Try mapping the zeolite phase type when varying the AlO2- content and NaOH content in that region, you may have some luck. There are a lot of publications of the methods but I found that I was unable to reproduce many of the claims. I had success when I made a phase map. You also can produce a small pore analcime. Oh and those syntheses were fast, complete in 1 or 2 days and I did them at higher temperatures around 180oC. Good luck. All that information is found in Elsevier Science Direct literature so double check for citations.
Nathan, OK thank you very much for your information. Have you published your research? I want to read it. What type of silica have you used? I used CaBOSil and temperatures around 150 and 175oC. I've found some publications but i never found the synthesis of ZSM-5 Free OSDA in non-static condition. According to you, AlO2- and NaOH plays important role in formation of pore and structure?
Best regards,
Sure, I publish my research but my publication record is largely on zeolite beta and more on the mechanism of zeolite growth from early stage precursors to final crystals. I highlight the mechanism using colloidal characterization and theory. You may find it useful research for your work. I think that research gate has my background but I am new to research gate so I recommend having a look at http://pubs.acs.org/doi/abs/10.1021/cm800884q and a more recent work as http://pubs.acs.org/doi/abs/10.1021/cm3020995. For ZSM-5 free of organic structure director Microporous and Mesoporous Materials inside of Elseveir Science Direct has reports I just do not remember specifics, you have to search. You will not find my work on ZSM-5 because it was project related in industry.
Anytime you work with a solid silica source like CaBOSil rotating (non-static) conditions are important for the dissolution of silica and the mass transfer to crystallization to occur. So finding static synthesis is less common unless you work with colloidal or monomeric silica sources. High temperatures > 150oC were usually cited for the organic free work that I saw but I don't know what the effect of temperature really is, surely it affects kinetics but it may also effect phase selectivity. Yes Na+ and AlO2- are very important for zeolite growth but also Na+ and SiO- groups. I highlight these as ion pairs in my latter work on solid state chemistry of zeolite beta.
There are many similarities when doing synthesis of high-silica zeolites such as zeolite beta and ZSM-5 structures but each zeolite has its own tricks so to speak.
hi Vinsensia
i sent related articles to free template synthesis of ZSM-5 to your email address.
I synthesize zeolite LTA without using any directing aging just by control aging temperature. You can change the size from 400nm to 11 micrometer. It is really worth it to try. You can read this paper " http://pubs.acs.org.ezproxy1.lib.asu.edu/doi/abs/10.1021/acs.cgd.6b00133", if need more detail information please let me know.
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