Letter | Published:

Adsorption on Coal

Naturevolume 168page474 (1951) | Download Citation

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Abstract

IN a recent letter in Nature1, Lecky et al. have reported that surface areas of coal obtained from low-temperature nitrogen adsorption are considerably smaller than areas determined from water and methanol adsorption, while Malherbe2 found a similar discrepancy between areas of coal determined from low-temperature argon adsorption and heats of wetting in methanol. The doubts thus cast on the extent of the internal surface area of dry coal samples do not, however, necessarily apply to coal in its wet and swollen state, and it is in this form that coal is encountered in wet processing and also, as dust, in the lungs of coal-miners.

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References

  1. 1

    Lecky, Keith Hall and Anderson, Nature, 168, 124 (1951).

  2. 2

    Malherbe, Fuel, 30, 97 (1951).

  3. 3

    Maggs, Proc. Conference on Ultra-fine Structure of Coals and Cokes, 95 (B.C.U.R.A., 1944).

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Affiliations

  1. Pneumoconiosis Research Unit, Medical Research Council, Llandough Hospital, Nr. Cardiff

    • G. GARROD THOMAS

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https://doi.org/10.1038/168474a0

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