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FTIR SPECTRA OF ADSORBED PYRIDINE ON H-YAND USY AND TI-USY ZEOLITES AND MEASURE OF BRONSTED AND LEWIS ACIDITY PRODUCED ON THEM

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  • Review Of Research

Publication Year:

  • 2013

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Abstract (Original Language): 
The FTIR of adsorbed pyridine has been used as a characteristic tool to detect and measure the presence of Bronsted and Lewis acid centers on the solid surfaces The FTIR bands of pyridine are of interest to study the C-H and N-H stretching as well as the C-C and the C-N stretching in pyridine ring. In fig1-5 FTIR Spectra of adsorbed pyridine at 100,200, 300, 400OCon the samples are listed in the table are depicted. The acidity ,stability as well as catalytic activity of the Na-Y zeolite can be changed to various level by modifying its pore opening, pore volume void volumes as well as frame work Si/Al ratio and it is made suitable as a stable catalyst under sever conditions of catalytic reaction. It can also be used as a molecular sieves due to change in the dimensions of its pore opening due to its modification. The Na –Y synthesized zeolite is modified and made ultra-stable by controlled hydrothermal treatment. It is converted in to H-Y and various types of USY and Ti- USY zeolites. The modified H-Y and USY and Ti-USY samples produced are finally used for FTIR study of adsorbed pyridine in the present paper.
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