Synthesis and characterization of zeolite mazzite analogue in Na2O–Al2O3–SiO2–Piperazine–H2O
Zeolite Mazzite (MAZ) analogue was synthesized directly using piperazine as a structure directing agent. The reactive gel composition used was (5.0–7.0) piperazine:(6.0–7.0) Na2O:Al2O3:20.0SiO2:400H2O. Using this composition, the reaction time was shortened greatly to 4 days and the crystallization time was reduced as well. The DTA data showed that piperazine, in as-synthesized zeolite omega decomposed easily. The decomposition of the piperazine occurred at 400–480°C. NH3-TPD analysis proved that zeolite H-omega from piperazine had strong surface acidity with ammonia desorption temperature up to 590°C.
KeywordsZeolite mazzite analogue Piperazine Synthesis Characterization
Unable to display preview. Download preview PDF.
The authors are grateful to the National Science Foundation of China (Grants 20373047) and the Science Foundation of Shanxi (20041024) for financial support.
- 1.C. Baerlocher, W.M. Meier, D.H. Olson, Atlas of Zeolite Framework Types (Elsevier, Amsterdam, 2001) p. 180Google Scholar
- 6.J.F. Cole, H.W. Kouwenhoven, in Molecular Sieve, ed. by W.M. Meier, J.B. Uytterhoeven (American Chemical Society, Washington, DC, 1973), p. 583. Google Scholar
- 9.H. Ghobarkar, O. Schaf, U. Guth, High Pres. Res. 20, 45 (2001)Google Scholar
- 12.M.K. Rubin, C.J. Plank, E.J. Rosinski, U S Patent 4,021,447(1977)Google Scholar