Calcination and alkali metal modification of alumina as solid stationary phase in GC
Journal: INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY (Vol.10, No. 6)Publication Date: 2013-05-15
Authors : Ashraf Yehia El-Naggar;
Page : 2653-2662
Keywords : Alkali metal; Calcinations; Solid stationary phases; Thermodynamic parameters.;
Abstract
Alumina has unique textural properties and functionalized surface. The single or multi-treatments of alumina with calcination and alkali metal treatment (NaCl) are of prime one importance not only for determining the structure, textural and surface chemistry of the phase but also to understand how modification is related to the changes in these properties and also to the change in its performance as solid stationary phase. Thermodynamic parameters (ΔH, ΔG?and ΔS) were determined using?n-hexane as a probe in order to show the adsorbate-adsorbent interaction. It was observed that the non-polar solutes could be separated independent of the reactivity and porosity of the alumina surfaces. Alkali metal modification of the calciened alumina is a selective stationary phase for eluting natural gas sample exhibiting good separation.?
Other Latest Articles
- Improvement of Physical Clock Synchronization Algorithm by Two-Level Synchronization
- Analyze the Future: Cloud Computing, a New Phase in Information Technology Infrastructure Management
- SPATIO-TEMPORAL ANALYSIS OF AGRICULTURAL DEVELOPMENT IN GUJARAT
- An Instance Selection Algorithm Based On Reverse k Nearest Neighbor
- A New Method on Data Clustering Based on Hybrid K-Harmonic Means and Imperialist Competitive Algorithm
Last modified: 2016-06-29 19:00:24