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US 4,963,289 AGranted
Method for producing monodisperse aerosols
AssigneeThe United States of America as represented by the United States Department of Energy
InventorsLawrence W. Ortiz, Sidney C. Soderholm
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Abstract
An aerosol generator is described which is capable of producing a monodisperse aerosol within narrow limits utilizing an aqueous solution capable of providing a high population of seed nuclei and an organic solution having a low vapor pressure. The two solutions are cold nebulized, mixed, vaporized, and cooled. During cooling, particles of the organic vapor condense onto the excess seed nuclei, and grow to a uniform particle size.
Claims9
A method of producing a monodisperse aerosol comprising the steps of:
- mixing an organic liquid having a low vapor pressure with an aqueous solution having a high population of seed nuclei;
- nebulizing said mixed organic liquid and said aqueous solution;
- heating to flash vaporize nebulized organic liquid and said aqueous solution to produce vapors of said organic liquid and particles of said aqueous solution;
- cooling said vapors and said particles with a surrounding flow of cool air to condense said vapors onto said particles, and to promote uniform growth of said condensed vapors on said particles;
- and
- outputting a monodisperse aerosol comprising said condensed vapors on said particles.
3 more elements
Dependencies are inferred from the claim text.