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Main Title

Effects of temperature and pressure on particle collection mechanisms : [microfiche] : theoretical review /

Author

Parker, Richard. ; Jain, R. ; Le, T. ; Calvert, S.

CORP Author

Air Pollution Technology, Inc., San Diego, CA.;Industrial Environmental Research Lab., Research Triangle Park, NC.

Publisher

Environmental Protection Agency, Office of Research and Development, Industrial Environmental Research Laboratory ; For sale by the National Technical Information Service,

Year Published

1984

Report Number

EPA-68-02-2137; EPA-600/7-84-030

Stock Number

PB84-168921

Additional Subjects

Air pollution control equipment ; High temperature tests ; High pressure tests ; Particles ; Cyclone separators ; Performance evaluation ; Sampling ; Brownian movement ; Diffusion ; Mathematical models ; Design criteria ; Electrical properties ; Numerical solution

Holdings

Library	Call Number	Additional Info	Location	Last Modified	Checkout Status
NTIS	PB84-168921	Some EPA libraries have a fiche copy filed under the call number shown.		07/26/2022

Collation

169 pages : illustrations ; 28 cm.

Abstract

The report gives results of a theoretical and experimental investigation of the effects of high temperatures and high pressures (HTPs) on fundamental particle collection mechanisms. It gives experimental results of inertial impaction, cyclone separation, Brownian diffusion, and electrical migration tests at HTPs. The inertial impaction tests showed that existing impaction models are adequate for HTP predictions. Practical problems (e.g., materials, seals, and particle adhesion) pose more difficulties than any fundamental variations from impaction theory. The cyclone tests showed that cyclone efficiency decreases at high temperature and increases at high pressure for a constant inlet velocity. Available theoretical models could not predict the observed effects of HTP on collection efficiency. An empirical correlation for predicting the cyclone cut diameter was derived. Existing pressure-drop models predict the effects of HTP fairly well. The Brownian diffusion tests showed no detectable effects of HTP. This result is consistent with predictions for the particle size used in the tests (dp > 0.5 micrometer). No useful high temperature data were obtained with the electrical migration apparatus.

Notes

Includes bibliographical references. Issued March 1984. Microfiche,

Place Published

Research Triangle Park, N.C. :

Supplementary Notes