Abstract
A Frequency Response Method based on the infrared measurement of the sample temperature has been developed for adsorption kinetics measurements. It consists in modulating the experimental chamber volume at constant frequency. The complex ratio of the temperature response over the pressure response is independent of time but is a function of the frequency depending on all the kinetics parameters of the system. This method is accurate and allows to measure very fast kinetics. Its major drawback is that a spurious signal is observed at high pressure in absence of adsorption. The results obtained with silicalite-propane and NaX-carbon dioxide are compared with results obtained from other techniques (NMR, permeation, etc.).
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Grenier, P., Malka-Edery, A. & Bourdin, V. A Temperature Frequency Response Method for Adsorption Kinetics Measurements. Adsorption 5, 135–143 (1999). https://doi.org/10.1023/A:1008965223931
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DOI: https://doi.org/10.1023/A:1008965223931