Abstract
Maggs1 and Malherbe2, among others, have shown that coal behaves as a molecular sieve material. That is, the adsorption of nitrogen and argon at 77° K. is restricted because of activated diffusion into pores of molecular dimensions and gives data only on the readily accessible macropore area of coal. From heats of wetting and gas-adsorption data at higher temperatures, the macropore area is shown to represent an insignificant part of the total surface area of most coals.
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References
Maggs, F. A. P., Nature, 169, 793 (1952).
Malherbe, P. Le R., Fuel, 30, 97 (1951).
Emmett, P. H., A.S.T.M. Tech. Pub., 51, 95 (1941).
Walker, jun., P. L., Foresti, jun., R. J., and Wright, C. C., Indust. Eng. Chem., 45, 1703 (1953).
Delvaux, Leon, M. S. thesis, Pennsylvania State University (1955).
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WALKER, P., GELLER, I. Change in Surface Area of Anthracite on Heat Treatment. Nature 178, 1001 (1956). https://doi.org/10.1038/1781001a0
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DOI: https://doi.org/10.1038/1781001a0
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