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XIII.—The Adsorption of Gas under Pressure

Published online by Cambridge University Press:  15 September 2014

Henry Briggs  and
William Cooper
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Summary

1. Experiments made at 15° C. with various adsorbents and gases (chiefly nitrogen and hydrogen) show that a cylinder filled with adsorbent granules has a capacity for dry gas under a given pressure which is generally greater than its capacity when containing no adsorbent. For example, a cylinder charged with nitrogen at 35 atmospheres has its capacity increased by 66 per cent. by filling it with cocoanut charcoal.

2. Sudden outbursts of firedamp in coal-mines are the result of releasing immense quantities of gas adsorbed under pressure in coal.

3. The logarithmic relation derived by Williams is shown to apply to the adsorption isotherms of gases above their critical temperature up to pressures of 100 atmospheres, providing a correction be applied for the gas in the capillaries which is not adsorbed, but which exists under simple compression.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 41 , 1922 , pp. 119 - 127
Copyright
Copyright © Royal Society of Edinburgh 1922

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References

page 119 note * ‘Studies on Charcoal and Liquid Air,’ Proc. Roy. Inst., xviii (1906), p. 433.Google Scholar

page 120 note * H. Briggs, “The Adsorption of Gas by Charcoal, Silica, and other Substances,” Proc. Roy. Soc, A, 1921 (in course of publication).Google Scholar

page 121 note * Gross volume includes the interstitial spaces, or voids, between the granules.

page 123 note * H. Briggs, “Characteristics of Sudden Outbursts of Gas in Mines,” Trans. Inst. Min. Engs., vol. lxi.

page 124 note * Proc. Roy. Soc. Edin., xxxix (1918–19), p. 48; Proc. Roy. Soc., A, xcvi (1919), p. 287.Google Scholar

note *page 125 Williams has made use of a similar correction to allow for the volume occupied by the adsorbed layer, ibid., p. 306.