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Title: Thermophoretic separation of aerosol particles from a sampled gas stream

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.

Inventors:
 [1]
  1. (Halfway, OR)
Publication Date:
Research Org.:
WESTINGHOUSE HANFORD CO
OSTI Identifier:
865772
Patent Number(s):
US 4572007
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
DOE Contract Number:  
AC14-76FF02170
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
thermophoretic; separation; aerosol; particles; sampled; gas; stream; method; separating; gaseous; samples; contained; atmosphere; step; repelling; permeable; surface; membrane; heating; temperature; surrounding; resulting; forces; maintain; disclosed; apparatus; utilizes; downwardly; facing; heated; plate; material; combine; repulsion; gravity; prevent; size; contacting; surfaces; apparatus utilizes; permeable material; aerosol particle; gaseous samples; aerosol particles; gas stream; gas permeable; separating gaseous; permeable surface; gaseous sample; surrounding atmosphere; disclosed apparatus; plate surface; prevent particles; separating gas; thermophoretic force; prevent particle; /73/95/96/

Citation Formats

Postma, Arlin K. Thermophoretic separation of aerosol particles from a sampled gas stream. United States: N. p., 1986. Web.
Postma, Arlin K. Thermophoretic separation of aerosol particles from a sampled gas stream. United States.
Postma, Arlin K. Wed . "Thermophoretic separation of aerosol particles from a sampled gas stream". United States. https://www.osti.gov/servlets/purl/865772.
@article{osti_865772,
title = {Thermophoretic separation of aerosol particles from a sampled gas stream},
author = {Postma, Arlin K.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

Patent:

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