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Vapor pressure of water adsorbed on dehydrated eggs

, : Vapor pressure of water adsorbed on dehydrated eggs. Indust And Engineer Chem Indust Ed 37(10): 1018-1022

Equilibrium pressure of water vapor over spray-dried whole eggs was detd. at 6 temps. varying from 17.1[degree] to 70[degree]C and at moisture contents ranging from 0.5 to 5.5%. The results agreed well with similar data on eggs dried from the frozen state and with other published data. The results were analyzed by a graphical method, and from this analysis was derived the isosteric heat of adsorption of water on dried eggs at various moisture levels. The ratio of the isosterie heat to the latent heat of condensation of water vapor increases from 1.1 to 2.1 as the moisture content decreases from 5.5 to 0.5%. The adsorption isotherms can be represented, within certain limits, by the Bruuauer, Emmett, and Teller theory of adsorption of gases by solids.


DOI: 10.1021/ie50430a031

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