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Characterization of an Algerian diatomite by inverse gas chromatography: Specific and non-specific contribution and Lewis acid–base parameters |
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| Authors: | Hanifa Daoui Yasmine Bouhamidi Ahmed Boucherit Mohamed Zouikri |
| Institution: | 1. Department of Process Engineering, Faculty of Technology, University of Blida-1, Blida, Algeria;2. Laboratory of Industrial Processes Engineering Sciences, Faculty of Mechanical and Engineering Processes, University of Science and Technology Houari Boumediene, Algiers, Algeria;3. Laboratory of Chemical Engineering, Department of Process Engineering, Faculty of Technology, University of Blida-1, Blida, Algeria;4. Department of Chemical, Faculty of Science, University of Blida-1, Blida, Algeria |
| Abstract: | The fundamental understanding of the behavior of a solid is intimately related to the understanding of the interactions on the surface of the latter, a major challenge in particular if the material is natural and ecological. The infinite dilution-inverse gas chromatography was used to evaluate the surface thermodynamic properties of several phases (grafted and/or coated) diatomite. A series of non- or polar-solute probes were injected at temperatures of 45?°C and 90?°C. The dispersive surface free energies values of the supports decrease with increasing temperature and their active surface is amphoteric with predominantly acidic character. |
| Keywords: | Diatomite infinite dilution-inverse gas chromatography (ID-IGC) dispersive surface free energy specific component of surface free energy Lewis acid–base parameters |