Abstract
The LC technique previously developed for the study of liquid adsorption and diffusion in zeolite crystals has been extended to study liquid adsorption and diffusion in alumina materials by the moment method using a commercial HPLC apparatus. The adsorption equilibrium constants (K e) and effective intraparticle diffusivity (D e) of polar and non-polar sorbates (pyridine, 1-nitropropane, acetone, ethyl acetate and toluene) with cyclohexane as the solvent in three aluminas are determined at 30, 50 and 70°C. The effects of the liquid sorbate polarity and alumina hydroxyl content on adsorption and diffusion in aluminas are experimentally examined. Values of K e for the polar sorbates are found to be substantially greater than those for non-polar sorbate, while values of D e are similar for all studied sorbates (in the order of 10 5 cm 2/s). The surface diffusivities calculated from D e decrease as K e increases. Experimental results show that the chemical nature between sorbate and alumina surface is the predominant factor affecting liquid adsorption and diffusion in aluminas.
| Original language | English (US) |
|---|---|
| Title of host publication | AIChE Symposium Series |
| Publisher | Publ by AIChE |
| Pages | 1-12 |
| Number of pages | 12 |
| Volume | 84 |
| Edition | 264 |
| State | Published - 1988 |
| Externally published | Yes |
| Event | Adsorption and Ion Exchange: Fundamentals and Applications - New York, NY, USA Duration: Mar 6 1987 → Mar 10 1987 |
Other
| Other | Adsorption and Ion Exchange: Fundamentals and Applications |
|---|---|
| City | New York, NY, USA |
| Period | 3/6/87 → 3/10/87 |
ASJC Scopus subject areas
- General Chemical Engineering
- General Chemistry