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RESEARCH PAPERS

Vanadium Pentoxide Deposition From Combustion Gases

[+] Author and Article Information
A. B. Hedley, T. D. Brown, A. Shuttleworth

Department of Fuel Technology and Chemical Engineering, Sheffield University, Sheffield, England

J. Eng. Power 88(2), 173-178 (Apr 01, 1966) (6 pages) doi:10.1115/1.3678501 History: Received August 03, 1965; Online January 10, 2012

Abstract

The rate of deposition of vanadium pentoxide vapor from combustion gases produced by burning a liquid fuel (kerosene with added vanadium ethyl hexoate) under controlled mixing-history conditions has been shown to agree with the following theoretical mass transfer equation when considering cooled tubes in a transverse gas stream:

m = 0.8B(Sc)2/3(Pr)1/3(μρ)1/2VD1/2
Theoretical and experimental evidence indicates the existence of a “dew point” at a deposition surface temperature of about 670 C. In addition, it would appear that, for the mechanism of deposition under consideration, an “induction” or “immunity” period before the onset of deposition does not exist. Experimental evidence also shows that the rate of deposition was not affected by changes in the excess air level within the range 25 to 1 percent.

Copyright © 1966 by ASME
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