ACIDITY STUDIES ON TITANIUM SILICALITES-l (TS-l) BYAMMONIA ADSORPTION USING MICROCALORIMETRY
IR@IIP: CSIR-Indian Institute of Petroleum, Dehradun
View Archive Info| Field | Value | |
| Creator |
Prashant,Kumar
Gupta,J.K Murali Dhar,G Rao,T.S.R Prasada |
|
| Date |
2009-07-15T11:28:01Z
2009-07-15T11:28:01Z 2009-07-15T11:28:01Z |
|
| Identifier |
Recent Advances in Basic and Applied Aspects of Industrial Catalysis Studies in Surface Science and Catalysis, Vol. 113
http://hdl.handle.net/123456789/350 |
|
| Description |
Various titanium silicates (TS-I) synthesized following two different routes by
conventional method and by sol-gel method have been characterized by microcalorimetric
adsorption of ammonia. Calorimetric measurements of a basic probe (NH3) have shown that
these solids were ;very acidic compared to a silicalite-l sample. An introduction of a small
amount of titanium creates acid sites of higher order in the medium strength range at low Ti
contents (i.e., high SiiTi ratios) in both sample prepared by conventional and sol gel methods.
The sample prepared by sol-gel method (SGM) found to possess stronger acidity compared to
conventional preparations and this especially so at higher titanium content. The molecular
sieve with low titanium contents displayed acid strength distribution more similar to silicalite.
The unavoidable presence of chlorine is found to be responsible for the observed higher
acidity in incipient wetness impregnated samples.
Key words: TS-l, Adsorption calorimetry, Wetness impregnation, Bronsted acidity.
|
|
| Language |
en_US
|
|
| Subject |
Heterogeneous Catalysis
Adsorption calorimetry |
|
| Title |
ACIDITY STUDIES ON TITANIUM SILICALITES-l (TS-l) BYAMMONIA ADSORPTION USING MICROCALORIMETRY
|
|
| Type |
Article
|
|