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

Iranian Journal of Catalysis

مقاله 1، دوره 9، شماره 4، اسفند 2019، صفحه 273-280   

نوع مقاله: Articles

نویسندگان

Kishor Kr Shah^{* 1}؛ Jitu Saikia²

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

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

چکیده

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.

کلیدواژه‌ها

MFI؛ Calcium؛ Ion-exchange, Microporous, Anisole

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