Zeolite thermodynamics and kinetics. Final report for June 15, 1996 to June 15, 2000 to the U.S. Department of Energy, Geosciences Research Program, Office of Basic Energy Sciences on Grant No. DE-FG02-96ER14634

Barnes, H. L. ; Wilkin, R. T. ; Benning, L. G.

Pennsylvania State University. Department of Geosciences.

关键词: Hydration;    Zeolites;    Zeolites;    Temperature Range 0400-1000 K;    Mordenite;   

DOI  :  10.2172/811795
RP-ID  :  DOE/ER/14634--1
RP-ID  :  FG02-96ER14634
RP-ID  :  811795

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来源: UNT Digital Library

【 摘 要 】

This report summarizes results obtained on the thermodynamic and kinetic properties of zeolites. DOE funding supported the development of techniques of material preparation as well as experimental strategies and methods for measuring solubilities, hydration states, and rates of zeolite dissolution, precipitation, and nucleation. The hydrothermal experiments provided temperature-dependent solubility products, hydration states, and a set of standard free energies of formation for end-member Na-, K-, and Ca-clinoptilolite, mordenite, and analcime. Flow-through experimental methods were used to measure the rates of Na-clinoptilolite and analcime dissolution and precipitation as a function of reaction affinity to 250C. Finally, the experimental system was modified so that the clinoptilolite-to-analcime transformation was monitored, and its rates and mechanisms were evaluated.