Thermophoretic separation of aerosol particles from a sampled ga

Details Thermophoretic separation of aerosol particles from a sampled ga Thermophoretic separation of aerosol particles from a sampled ga

1984-09-07

1986-02-25

Swisher, S. Clement

Measuring and testing

Sampler, sample handling, etc.

With heating or cooling

55 16, 55 81, 55158, 55209, G01N 122

Patent

active

045720070

ABSTRACT:
A method for separating gaseous samples from a contained atmosphere that includes aerosol particles uses the step of repelling particles from a gas permeable surface or membrane by heating the surface to a temperature greater than that of the surrounding atmosphere. The resulting thermophoretic forces maintain the gas permeable surface clear of aerosol particles. The disclosed apparatus utilizes a downwardly facing heated plate of gas permeable material to combine thermophoretic repulsion and gravity forces to prevent particles of any size from contacting the separating plate surfaces.

REFERENCES:
patent: 1174631 (1916-03-01), Snelling
patent: 2701467 (1955-02-01), Strong
patent: 2824620 (1958-02-01), Rosset
patent: 3552211 (1971-01-01), Dollinger
patent: 3630690 (1971-12-01), Coppola
patent: 3853504 (1974-12-01), Buscher
patent: 3866460 (1975-02-01), Pearce

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