Diffusion mechanism of water vapour in a zeolitic tuff rich in clinoptilolite

• Published in: Journal of thermal analysis and calorimetry Vol. 94; no. 3; pp. 699 - 702
• Main Authors: Çakıcğlu-Ozkan, F., Ülkü, S.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Dordrecht Springer Netherlands 01.12.2008; Springer
• Subjects: Analytical Chemistry; Chemistry; Chemistry and Materials Science; Crystalline rocks; Earth sciences; Earth, ocean, space; Exact sciences and technology; General and physical chemistry; Igneous and metamorphic rocks petrology, volcanic processes, magmas; Inorganic Chemistry; Ion-exchange; Measurement Science and Instrumentation; Physical Chemistry; Polymer Sciences; Surface physical chemistry; Zeolites: preparations and properties; adsorption; diffusion; clinoptilolite; gravimetric system; water vapor; Transport properties; Liquid solid adsorption; volcanic rocks; gravimetry; igneous rocks; Molecular sieve; pyroclastics; zeolite; tuff; Reaction mechanism; silicates; framework silicates; kinetics
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-008-9357-8

The adsorption kinetics of H 2 O in a clinoptilolite rich zeolitic tuff was experimentally investigated at 18°C. In the identification of the diffusion mechanism the isothermal adsorption model equation was used. It was found out that the intraparticle mass transfer becomes more dominant over the heat transfer with increase in particle size and the adsorptive dose pressure. Although initially intraparticle mass transfer was the controlling resistance later external heat transfer also contributes to the transfer mechanism.