Science Dictionary » Index Z http://www.mysciencedictionary.com Definition of Education Mon, 16 Aug 2010 06:24:45 +0000 en hourly 1 Definition of Zeolites http://www.mysciencedictionary.com/definition-of-zeolites/ http://www.mysciencedictionary.com/definition-of-zeolites/#comments Thu, 24 Sep 2009 12:52:06 +0000 aman http://www.mysciencedictionary.com/?p=353 Zeolites are shape selective catalyst which have honey-comb like structure. Zeolites have a pore size between 260 pm to 740 pm which makes them possess, the unique property of shape-selectivity of Zeolites. Chemically, Zeolites are micro porous alumino silicates with three dimensional networks of silicates in which some silicon atoms are replaced by aluminium atom giving Al-O-Si framework.

The general chemical formula of Zeolites is Mx/n [(AlO2)x (SiO3)y].mH2O and may be considered as open structure of silica in which aluminium has been substituted in a fraction x/(x+y) of its tetrahedral sites.

]]> http://www.mysciencedictionary.com/definition-of-zeolites/feed/ 0 Example of Zeolites http://www.mysciencedictionary.com/example-of-zeolites/ http://www.mysciencedictionary.com/example-of-zeolites/#comments Tue, 22 Sep 2009 18:47:12 +0000 djeet http://www.mysciencedictionary.com/?p=356 Example of Zeolites : ZSM-5 is a commercially important Zeolite which is used to convert alcohol to gasoline (petrol).

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