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Synthesis and Characterization of Ferrierite-Type Zeolite in the Presence of Nonionic Surfactants

โœ Scribed by R.B. Khomane; B.D. Kulkarni; R.K. Ahedi

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
313 KB
Volume
236
Category
Article
ISSN
0021-9797

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โœฆ Synopsis

Pure-phase ferrierite (FER) zeolite has been synthesized in the presence of small amounts of nonionic surfactants, Tween 20 and Tween 80. The input SiO 2 /Al 2 O 3 molar ratio has been varied over a range of 25 to 150. The results confirm that a small amount of pyrrolidine acts as a template and is necessary. The effects of varying concentration of surfactant on ferrierite crystallization and output SiO 2 /Al 2 O 3 molar ratio are reported. The results also show that in the absence of pyrrolidine, ZSM-5 cocrystallized with FER, whereas in the absence of a nonionic surfactant the yield and crystallization of FER are very poor. The XRF analysis shows the changes in SiO 2 /Al 2 O 3 output molar ratios as the surfactant concentration changes. The XRD data show that the samples are fully crystalline and pure. The TG/DTA of the sample shows its structural stability. The scanning electron microscopy results show changes in particle size with varying concentration of nonionic surfactant.

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