Thermophoretic separation of aerosol particles from a sampled gas stream

Patent · Tue Feb 25 04:00:00 EST 1986

OSTI ID:5897283

Poztman, A K

A method is described for separating aerosol particles from a gas sample being withdrawn from a contained atmosphere, comprising the following steps: placing within the contained atmosphere a covering gas impermeable enclosure have an interior chamber partly defined by a bottom metal plate that is permeable to gas; fixing the position of the enclosure with the plate facing downwardly and directly exposed to the contained atmosphere; heating the metal plate to a temperature greater than that of the contained atmosphere, whereby aerosol particles are repelled to the resulting thermophoretic forces applied to them by the temperature gradient produced in the atmosphere immediately under the plate; and sampling gas within the interior chamber of the enclosure.

• Assignee: Dept. of Energy
• Patent Number(s): US 4572007
• OSTI ID: 5897283
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ATMOSPHERES
CONTROLLED ATMOSPHERES
COVER GAS
ELEMENTS
FLUID FLOW
FLUIDS
GAS FLOW
GASES
HEATING
INERT ATMOSPHERE
METALS
PARTICLES
PARTICULATES
PERMEABILITY
SAMPLING
SEPARATION PROCESSES
TEMPERATURE GRADIENTS
THERMOPHORESIS