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Title: Quantification of Bronsted acidity of rare earth exchanged (Ce3+, La3+, Sm3+and RE3+) NaFAU-Y zeolites in their Bronsted acid forms
Authors: Thomas, Bejoy
Sugunan, S
Issue Date: Mar-2006
Publisher: NISCAIR-CSIR, India
IPC Code: Int. Cl.8 B01J29/800
Abstract: Thermodesorption of sterically hindered molecule such as 2,6- dimethyl pyridine (2 ,6-DMP) and cumene cracking test reactions have been applied to determine the nature of Bronsted acid sites (BAS) in pure H-Y, and various rare earth exchanged (Ce3+, La3+, Sm3+and RE3+)  Na-Y zeolites. Incompatibility in the amount of 2.6-DMP desorbed is clearly an indication of the influence of the nature of rare earth metal ions in producing BAS in zeolites. A one- to-one correlation has been observed between the amount of benzene formed during the catalytic cracking of cumene and Bronsted acidity measured by thermodesorption of the probe molecule.
Page(s): 648-652
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections: IJC-A Vol.45A(03) [March 2006]

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