Thermodynamics of H/Na exchange on amorphous zirconium phosphate in mixed solvents
|
 |
|
Post a Comment
|
|
|
|
|
CONTRIBUTORS:
|
|
|
JOURNAL:
|
Can. J. Chem.,
61(??),
1902 -
??.
|
|
|
|
YEAR:
|
1983
|
|
PUB TYPE:
|
Journal Article
|
|
SUBJECT(S):
|
amorphous zirconium phosphate, H/Na exchange, thermodynamics, mixed solvents, medium effect, ion-solvent interactions, ion exchange, inorganic ion exchangers
|
|
DISCIPLINE:
|
Chemistry
|
|
HTTP:
|
|
|
LANGUAGE:
|
English
|
|
PUB ID:
|
103-434-794
(Last edited on
2007/05/31 12:08:21 GMT-6)
|
|
SPONSOR(S):
|
|
|
ABSTRACT:
The standard free energy change of the H/na exchange on zirconium phosphate is positive and changes a little on addition of up to90% methanol. On addition of isopropanol and acetone, this free energy change becomes less positive. Both the standard enthalpy and entropy changes become progressively less negative on adding increasing amounts of organic solvents. The decrease of the standard free energy change on addition of isopropanol and acetone is at least partly due to effects on the ion-solvent interactions in the liquid phase. In case of methanol, these effects lead to a decrease of the standard free energy change but the decrease is mostly balanced by an increase due to effects on the ibteractions in the solid phase. The latter effects involve an increase of enthalpy and a decrease of entropy; these changes are larger the higher the methanol content, possible reasons for these enthalpy and entropy changes are discussed.
|
|
|
|
STATISTICS
|
|
Click on # to view
|
|
Citations
|
|
0
|
|
References
|
|
0
|
|
Comments
|
|
0
|
|
Quality
|
|
0/0.00
|
|
Interest
|
|
0/0.00
|
|
View(er)s
|
|
2/144
|
|
|
|
|
|
|
| Prev |
Next |
|