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CFC Alternatives: A Fresh Look

Srinivasan, Kandadai (1992) CFC Alternatives: A Fresh Look. In: Environmental Conservation, 19 (4). pp. 339-342.

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This article examines, through a molecular perspective, the 'ozone-friendly' refrigerants R-134a and R-123 vis-à-vis R-12 and R-11, which are targeted to be phased out under the Montreal Protocol on Substances that Deplete the Ozone Layer, Final Act (1987). It appears that the molecular weight, size parameter, and dipole moment, of R-134a and R-123, may induce a pronounced effect on the chemical equilibrium of ice particles in the polar stratospheric clouds and subsequently influence the photochemical reactions therein. Non-polar, high-molecular-weight perfluoropropane (R-218), could be a better substitute for R-12, while R-134, which is a non-polar HFC of the ethane family, could also be a candidate although its molecular weight is lower than that of R-12. The search for a good substitute for R-11, however, must continue.

Item Type: Journal Article
Publication: Environmental Conservation
Publisher: Cambridge University Press
Additional Information: Copyright of this article belongs to Cambridge University Press.
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 26 Oct 2009 07:10
Last Modified: 26 Oct 2009 07:10
URI: http://eprints.iisc.ac.in/id/eprint/24590

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