Effect of the silica sources on the crystallinity of nanosized ZSM-5 zeolite
β Scribed by Reda M. Mohamed; Hisham M. Aly; Mohamed F. El-Shahat; Ibrahim A. Ibrahim
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 353 KB
- Volume
- 79
- Category
- Article
- ISSN
- 1387-1811
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Partially crystalline and X-ray amorphous ZSM-5 zeolite-based aluminosilicates have been synthesized and thoroughly characterized by chemical analysis, XRD, FT-IR, solid state MAS NMR, N 2 adsorption, TEM, NH 3 -TPD and isopropanol dehydration as the catalytic test reaction. The X-ray amorphous and
Methanol can be converted to a wide range of hydrocarbons using zeolite or chryso-zeolite ZSM-5 type catalysts. Chryso-zeolite ZSM-5 catalysts, which were prepared from asbestos fibers, were found to be active and very selective in the conversion of methanol when compared to a "pure" zeolite ZSM-5.
A series of H-ZSM-5 zeolite was deactivated by vanadium impregnation followed by a steaming treatment. Textural properties and total acidity measured by n-hexane cracking were determined before and after hydrothermal treatment (steaming). After vanadium impregnation, a decrease in n-hexane conversio