Formation of SO3 in a Noncatalytic Combustor

[+] Author and Article Information
Richard E. Barrett, John D. Hummell

Thermal Systems Division, Battelle Memorial Institute, Columbus, Ohio

William T. Reid

Battelle Memorial Institute, Columbus, Ohio

J. Eng. Power 88(2), 165-172 (Apr 01, 1966) (8 pages) doi:10.1115/1.3678500 History: Received August 03, 1965; Online January 10, 2012


The major contributor to corrosion and deposits in boilers and gas turbines has been recognized as the reaction of sulfur oxides, especially SO3 , in the combustion gas with furnace elements. One way to minimize these reactions is to reduce the quantity of SO3 formed. Factors affecting SO3 formation have been studied in a noncatalytic laboratory combustor, and results of the investigation show that SO3 in the combustion gas can be reduced by: (a) Reducing excess air, (b) burning fuel with a lower sulfur content, (c) preventing air leakage into the combustion system, and (d) covering catalytic surfaces, such as superheater tubes, with less catalytic protective coatings. Some experiments showed that iron-oxide coatings, which built up on iron surfaces, were highly catalytic for the production of SO3 under boiler-furnace-simulated conditions.

Copyright © 1966 by ASME
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