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Published November 1963 | Published
Journal Article Open

Experimental determination of desorption rates and of heats of desorption


Gas discharge rates through a de Laval nozzle from a closed chamber have been measured for Ar, He, and CO_2. The effective desorption rates from vessels containing sand and silica gel have also been determined at various temperatures by measuring the time rate of pressure decay in the chamber. The experimental data have been used, in conjunction with a theoretical expression for diffusion controlled desorption rates, to estimate heats of desorption from silica gel. Results have been obtained that are in approximate agreement with estimates made by other investigators using more conventional procedures.

Additional Information

© 1963 American Institute of Physics. Received 13 May 1963. Online Publication Date: 9 December 2004. These studies were supported by the U. S. Army Research Office (Durham) under Grant No. DA-ARO (D)-31-124-G289.

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