Liquid phase adsorption isotherm of azeotropic and non-azeotropic organic solvent mixture onto porous adsorbents
Adsorption isotherm is an essential component in the understanding of the adsorption process. There are several ways and methods for the measurements, analysis and interpretation of adsorption isotherms either for gas or liquid phase adsorption. However, in the adsorption from solution were usually...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English English |
| Published: |
2015
|
| Subjects: | |
| Online Access: | https://eprints.ums.edu.my/id/eprint/42643/1/24%20PAGES.pdf https://eprints.ums.edu.my/id/eprint/42643/2/FULLTEXT.pdf https://eprints.ums.edu.my/id/eprint/42643/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Adsorption isotherm is an essential component in the understanding of the adsorption process. There are several ways and methods for the measurements, analysis and interpretation of adsorption isotherms either for gas or liquid phase adsorption. However, in the adsorption from solution were usually conducted at low region of liquid concentration and the direct interpretation of excess adsorption isotherm as adsorption isotherm. Therefore, a study on the adsorption of azeotropic and non-azeotropic organic solvent mixture onto porous adsorbent for whole range of liquid concentration is conducted. The study includes the measurement of excess adsorption isotherm, theoretical analysis, and interpretation of adsorption isotherm by using Pseudo Ideal Adsorption Model, Gibbs Dividing Plane Model and Langmuir- Freundlich Model as well as validation of theoretical analysis by direct measurement of adsorption. In this study, organic solvents such as acetone, methanol and propanol were chosen as the adsorbates whereas activated carbon and silicalite were chosen as the porous adsorbents. The measurement of excess isotherm was conducted using conventional method where known amount of adsorbent was mixed with known quantity and quality of organic solvent mixture in a sealed container and kept at constant temperature for a certain period to be equilibrated. Then the equilibrated liquid concentration was determined by standard procedure using Gas Chromatography Mass Spectrometer. The result of this study had shown that some agreement for the complete concentration range of adsorption isotherm trend for those interpreted and measured values, but not the magnitude. |
|---|