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New SUZ-4 Zeolite Membrane from Sol-Gel Technique
A new SUZ-4 zeolite membrane with tetraethlyammonium hydroxide as the template was fabricated on mullite tube via hydrothermal sol-gel synthesis in a rotating autoclave reactor. The suitable synthesis condition was SiO2:Al2O3 ratio of 21.2 for 4 days at 155 °C crystallization under autogenous pressure. The obtained SUZ-4 possessed a high BET surface area of 396.4 m2/g, total pore volume at 2.611 cm3/g, and narrow pore size distribution with 97 nm mean diameter and 760 nm long of needle crystal shape. The SUZ-4 layer obtained from seeding crystallization was thicker than that of without seeds or in situ crystallization.
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[1] S. A. Barri. "Crystalline (metallo) silicates and germanates-SUZ-4," United States 5,118, 483, 1992.
[2] S. L. Lawton, J. M. Bennett, J. L. Schlenker and M. K. Rubin. "Synthesis and proposed framework topology of zeolite SUZ-4," J. Chem. Soc., Chem. Commun. vol. 11, pp. 894-896. 1993.
[3] K. G. Strohmaier, M. Afeworki and D. L. Dorset. "The crystal structures of polymorphic SUZ-4," Z. Kristallogr., vol. 221, pp. 689- 698. 2006.
[4] W. C. Paik, C. H. Shin and S. B. Hong. "Synthesis of zeolites P1 and SUZ-4 through a synergy of organic N,N,N,N',N',N' hexaethylpentanediammonium and inorganic cations," J. Chem. Soc., Chem. Commun., pp. 1609-1610. 2000.
[5] W. C. Paik, C. H. Shin, J. M. Lee, B. J. Ahn and S. B. Hong. "Hostguest interactions in P1, SUZ-4, and ZSM-57 zeolites containing N,N,N,N',N',N' hexaethylpentanediammonium ion as a guest molecule," J. Phys. Chem. B, vol.105, pp. 9994-10000. 2001.
[6] D. B. Lukyanov, V. L. Zholobenko, J. Dwyer, S. A. I. Barri and W. J. Smith. "On the structural, acidic and catalytic properties of zeolite SUZ- 4," J. Phys. Chem. vol. 103, pp. 197-202, 1999.
[7] H. Choo, S. B. Hong and L. Keven. "Comparative ESR and catalytic studies of ethylene dimerization on Pd(II)-exchanged clinoptilolite, mordenite, ferrierite, and SUZ-4," J. Phys. Chem. B, vol. 105, pp. 7730- 7738. 2001.
[8] M. A. Asensi, M. A. Camblor and A. Martinez. "Zeolite SUZ-4: Reproducible synthesis, physicochemical characterization and catalytic evaluation for the skeletalisomerization of n-butenes," Micropor. Mesopor. Mater. vol. 28, pp. 427-436, 1999.
[9] A. Subbiah, B. K. Cho, R. J. Blint, A. C. Gujar, G. L. Price and J. E. Yie. "NOx reduction over metal-ion exchanged novel zeolite under lean conditions: activity and hydrothermal stability," Applied Catalysis B: Environmental, vol.42, pp. 155-178. 2003.
[10] S. Jiang, Y. K. Hwang, S. H. Jhung, J.-S. Chang and J.-S. Hwang. "Zeolite SUZ-4 as selctive dehydration catalyst for methanol conversion to dimethyl ether," Chemistry Letters, vol.33, pp. 1048-1049, 2004.
[11] S.-H. Lee, C.-H. Shin, G. J. Choi, T.-J. Park, I.-S. Nam, B. Han and S. B. Hong. Zeolite synthesis in the presence of flexible diquaternary alkylammonium ions (C2H5)3N+(CH2)N+(C2H5)3 with n = 3-10 as structure-directing agents. Micropor. Mesopor. Mater., vol. 60, pp. 237- 249, 2003.
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[17] S.-H. Lee, C.-H. Shin and S. B. Hong. "Investigations into the origin of the remarkable catalytic performance of aged H-ferrierite for the skeletal isomerization of 1-butene to isobutene," J. Catalysis, vol.223, pp. 200- 211. 2004.
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