Synthesis and Characterization of Ferrierite-Type Zeolite in the Presence of Nonionic Surfactants.
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. Copyright 2001 Academic Press.
Khomane
R. B.
RB
Chemical Engineering Division, National Chemical Laboratory, Pune, 411 008, India
Kulkarni
B. D.
BD
Ahedi
R. K.
RK