Abstract
An `indicator titration' method that can identify the acidity of a zeolite is presented. This method is particularly useful when the zeolite possesses acidity that is below the detection limit of conventional techniques such as MAS NMR. However, this technique underestimates the extent of acidity of zeolites that contain a large number of acidic sites such as in CaY and HY. On the basis of this technique, the commonly available alkali metal exchanged Y zeolites are estimated to contain one acidic site per approximately 116 aluminums. In contrast to Y, the alkali metal exchanged X zeolites do not contain enough Bronsted acid sites to be detected by this technique.
| Original language | English |
|---|---|
| Pages (from-to) | 6687-6692 |
| Number of pages | 6 |
| Journal | Langmuir |
| Volume | 14 |
| Issue number | 23 |
| DOIs | |
| State | Published - Nov 1 1998 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Colloid and Surface Chemistry
- Physical and Theoretical Chemistry
Cite this
Detection and estimation of Bronsted acidities in alkali metal cation exchanged X and Y zeolites. / Thomas, K. J.; Ramamurthy, Vaidhyanathan.
In: Langmuir, Vol. 14, No. 23, 01.11.1998, p. 6687-6692.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Detection and estimation of Bronsted acidities in alkali metal cation exchanged X and Y zeolites
AU - Thomas, K. J.
AU - Ramamurthy, Vaidhyanathan
PY - 1998/11/1
Y1 - 1998/11/1
N2 - An `indicator titration' method that can identify the acidity of a zeolite is presented. This method is particularly useful when the zeolite possesses acidity that is below the detection limit of conventional techniques such as MAS NMR. However, this technique underestimates the extent of acidity of zeolites that contain a large number of acidic sites such as in CaY and HY. On the basis of this technique, the commonly available alkali metal exchanged Y zeolites are estimated to contain one acidic site per approximately 116 aluminums. In contrast to Y, the alkali metal exchanged X zeolites do not contain enough Bronsted acid sites to be detected by this technique.
AB - An `indicator titration' method that can identify the acidity of a zeolite is presented. This method is particularly useful when the zeolite possesses acidity that is below the detection limit of conventional techniques such as MAS NMR. However, this technique underestimates the extent of acidity of zeolites that contain a large number of acidic sites such as in CaY and HY. On the basis of this technique, the commonly available alkali metal exchanged Y zeolites are estimated to contain one acidic site per approximately 116 aluminums. In contrast to Y, the alkali metal exchanged X zeolites do not contain enough Bronsted acid sites to be detected by this technique.
UR - http://www.scopus.com/inward/record.url?scp=0032204357&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032204357&partnerID=8YFLogxK
U2 - 10.1021/la980631v
DO - 10.1021/la980631v
M3 - Article
AN - SCOPUS:0032204357
VL - 14
SP - 6687
EP - 6692
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 23
ER -