Ca-modified MFI zeolite: A study on its synthesis, characterization and catalytic activity

Document Type: Articles

Authors

1 Department of Chemistry, ADP College, Nagaon, Assam- 782002, India.

2 Rajiv Gandhi Govt. Polytechnic, Itanagar, Arunachal Pradesh 791113, India.

Abstract

Using hydrothermal synthesis process a series of Mobil Five (MFI) zeolites were synthesized with silica to alumina ratio (SAR) of 50, 100 and 200. The synthesized MFI zeolites were used to exchange with 0.5%, 1.0% and 2.0% Ca(NO3)2 solutions for modification of MFI zeolites to Ca-MFI zeolite. The formation of MFI zeolite phases was identified by XRD and FT-IR analysis. TGA studies reveal the thermal stability of the synthesized samples. The successful exchange of the parent samples with Ca was confirmed by UV-Vis (DR) spectra. The specific surface area, pore volume and pore size of the synthesized samples were investigated by the nitrogen adsorption-desorption isotherm. The morphology of the synthesized samples was examined using the scanning electron microscopy. O-methylation of phenol was carried over different synthesized catalysts to produce anisole as the major product.

Keywords


[1] J. Saikia, K.K. Shah, A.K. Talukdar, Int. J. Eng. Sci. Res. Technol. 3 (2014) 191-199.
[2] A. Dyer, Stud. Surf. Sci. Catal. 168 (2007) 525-553.
[3] J.D. Pless, R.S. Maxwell, M.L.F. Philips, K.B. Helean, M.Y. Axness, T.A. Nenoff, Chem. Mater. 17 (2005) 5101-5108.
[4] R. Kawase, A. Lida, Y. Kubota, K. Komura, Y. Sugi, K. Oyama, H. Itoh, Ind. Eng. Chem. Res. 46 (2007) 1091-1098.
[5] M.M.J. Treacy, J.B. Higgins, Collection of Simulated XRD Powder Patterns for Zeolites, 1st Ed., Elsevier Science, Amsterdam, 2001.
[6] Y. Yokomori, S. Idaka, Microporous Mesoporous Mater. 28 (1999) 405–413.
[7] R. Szostak, Molecular Sieves: Principles of Synthesis and Identification, 2nd Ed., Blackie Academic and Professional, London, 1998.
[8] J.L. Guth, H. Kessler, J.M. Higel, J.M. Lamblin, J. Patarin, A. Seive, J.M. Chezeau, R. Wey, Zeolite Synthesis in the Presence of Fluoride Ions: A Comparison with Conventional Synthesis Methods. ACS Symp. Ser., Vol. 398, American Chemical Society, Washington DC, 1989.
[9] J. Perez-Ramirez, J.C. Groen, A. Brückner, M.S. Kumar, U. Bentrup, M.N. Debbagh, L.A. Villaescusa, J. Catal. 232 (2005) 318-334.
[10] K. Jansen., H. Robson, Verified Syntheses of Zeolitic Materials, 2nd Ed., Elsevier Science, Amsterdam, 2001.
[11] T.J. Beutel, J. Chem. Soc. Faraday Trans. 94 (1998) 985-993.
[12] S. Ouk, S. Thiebaud, E. Borredon, P. Le Gars, Appl. Catal. A 241 (2003) 227-233.