Abstract
METZNER recently reported diffusion coefficients of ethylene and carbon dioxide into polymeric and colloidal solutions1. We have measured absorption rates of carbon dioxide in mixtures of hydrocarbons of molecular weight 160–360. In this work, for a twenty-four-fold increase in viscosity the diffusion coefficients varied from 0.73 × 10−5 to 2.50 × 10−5 cm2/sec. These data can be interpreted by existing theories on diffusion2. The values quoted by Metzner for diffusion of carbon dioxide into dilute solutions of carbopol and carboxy methyl cellulose are all within this range (1.8–2.4 × 10−5 cm2/sec) although the apparent viscosities of these solutions will be very much greater than that of the highest molecular weight hydrocarbon investigated (25 centipoise).
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References
Metzner, A. B., Nature, 208, 267 (1965).
Ponter, A. B., and Davies, G. A. (to be published).
Astarita, G., Ind. Eng. Chem. (Fundamentals), 4, No. 2, 236 (1965).
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PONTER, A., DAVIES, G. Comparison of Diffusion of Carbon Dioxide into Hydrocarbon Systems and Polymeric Solutions. Nature 210, 837 (1966). https://doi.org/10.1038/210837b0
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DOI: https://doi.org/10.1038/210837b0
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