Record Details

Acid sites distribution and their influence on the catalytic properties of mesoporous H-AlMCM-41 and H-FeMCM-41

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Acid sites distribution and their influence on the catalytic properties of mesoporous H-AlMCM-41 and H-FeMCM-41
 
Creator BADAMALI, SK
SAKTHIVEL, A
SELVAM, P
 
Subject molecular-sieves
fine chemicals
mcm-41
zeolites
alkylation
aluminum
phenol
 
Description The acid properties of mesoporous H-AlMCM-41 and H-FeMCM-41 catalysts were studied by temperature programmed desorption of ammonia. The results suggest the existence of four different types of acid sites. They are assigned to: (i) weak acid sites due to surface/terminal hydroxyl groups; (ii) moderate structural (Bronsted) acid sites associated with symmetrical tetrahedral AI(III) or Fe(III); (iii) strong structural (Bronsted) acid sites fi om a highly distorted tetrahedral AI(III) or Fe(III) and (iv) Lewis acid sites arising from tricoordinated Al(III) or Fe(III) in the framework. The t-butylation reaction of phenol over H-AlMCM-41 and H-FeMCM-41 showed high substrate conversion in the case of the former than the fatter. This could be attributed to presence of large excess of type (ii) and type (iii) acid sites in H-AlMCM-41.
 
Publisher WORLD SCIENTIFIC PUBL CO PTE LTD
 
Date 2011-10-25T06:00:40Z
2011-12-15T09:11:28Z
2011-10-25T06:00:40Z
2011-12-15T09:11:28Z
2000
 
Type Proceedings Paper
 
Identifier ADSORPTION SCIENCE AND TECHNOLOGY,553-557
981-02-4263-8
http://dx.doi.org/10.1142/9789812793331_0110
http://dspace.library.iitb.ac.in/xmlui/handle/10054/15623
http://hdl.handle.net/100/2089
 
Source 2nd Pacific Basin Conference on Adsorption Science and Technology,BRISBANE, AUSTRALIA,MAY 14-18, 2000
 
Language English