@article { ISI:000257362100009,
	title = {Non-isothermal kinetic studies of the template decomposition from silicalite-1 framework-high temperature X-ray diffraction and thermogravimetric analysis},
	journal = {Microporous and Mesoporous Materials},
	volume = {113},
	number = {1-3},
	year = {2008},
	month = {AUG},
	pages = {64-71},
	publisher = {ELSEVIER SCIENCE BV},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>Non-isothermal decomposition of the tetrapropylammonium cations (TPA(+)) intercalated in silicalite-1 framework has been carried out using thermogravimetric (TG) analysis and high temperature powder X-ray diffraction (HTXRD) techniques. Conversion factor for template decomposition is calculated using two methods viz., \% weight loss from the thermogravimetric analysis and changes in the intensities of the Bragg reflections 101/011 and 200/020 in the HTXRD patterns scanned at different temperatures (range 298823 K). The calculated apparent activation energy for template decomposition in air was 129 and 125 kJ mol(-1), respectively, for the two techniques TG and HTXRD, calculated using the Kissinger method. By Flynn-Wall-Ozawa approach of isoconversion, apparent activation energy for template decomposition in air was 123 and 124 U mol-1, respectively, for TG and HTXRD data. The reaction order was determined using the method of Kennedy and Clark and it is similar to 2 by both the techniques. The second order of template decomposition can be attributed to the fact that TPA+ is positioned in two different orientations inside the silicalite-1 framework. Template removal occurs with a contraction in unit cell dimensions. There is a decrease in the lattice parameters of the as-synthesized silicalite-1 sample after removal of template from the framework. (C) 2007 Elsevier Inc. All rights reserved.</p>},
	keywords = {HTXRD, non-isothermal kinetics, Silicalite-1},
	issn = {1387-1811},
	doi = {10.1016/j.micromeso.2007.11.002},
	author = {Bhange, Deu S. and Pandya, N. A. and Jha, Ratnesh Kumar and Ramaswamy, Veda}
}
@article { ISI:000275702600044,
	title = {Enhanced negative thermal expansion in MFI molecular sieves by varying framework composition},
	journal = {Microporous and Mesoporous Materials},
	volume = {130},
	number = {1-3},
	year = {2010},
	month = {MAY},
	pages = {322-326},
	publisher = {ELSEVIER SCIENCE BV},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>In the present investigations we have carried out the high temperature X-ray diffraction (HTXRD) studies on the metallosilicate molecular sieves iron silicalite-1 (FeS-1) samples of different Si/M ratios (Si/Fe = 50, 75, 100 and infinity) for their negative thermal expansion (NTE) behavior. All the samples exhibit NTE behavior in the temperature range 373-773 K. Systematic increase in negative thermal expansion coefficient is observed as a function of increasing Fe content in the MFI framework. Strength of the negative thermal expansion increases in the order Si/Fe = infinity \&lt; 100 \&lt; 75 \&lt; 50. It is concluded that by changing the composition of the framework of MFI, enhanced negative thermal expansion can be obtained. (C) 2009 Elsevier Inc. All rights reserved.</p>},
	keywords = {HTXRD, Negative thermal expansion, Silicalite-1},
	issn = {1387-1811},
	doi = {10.1016/j.micromeso.2009.11.029},
	author = {Bhange, Deu S. and Ramaswamy, Veda}
}
