ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
The work reported in this paper is an outgrowth of an exploratory investigation of the feasibility of spray drying of materials in solution by using direct-contact heat transfer from a hot liquid rather than a gas to vaporize the solvent from the drops. Unexpectedly, it was found that drops suspended in a hot liquid had to be superheated to a very extreme degree in order to initiate vaporization. This effect was of such interest that the investigation was modified to a fundamental study of the vaporization of drops containing no dissolved solids. The results are closely related to problems of bubble formation in boiling, cavitation, and in the evolution of gases from supersaturated solutions. The experimental technique developed in this study is believed to be unique and capable of giving quite accurate data on homogeneous nucleation in superheated drops. After a discussion of the theory of homogeneous nucleation in pure liquids, the theory is extended to the formation of bubbles in superheated drops. The theoretical predictions were found to be in close agreement with the experimental results.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690050412
