Abstract
The objective of the present study is to determine the effect of Kaolin as a fuel oil additive to minimize the fireside corrosion of superheater boiler tubes of ASTM designation (A213-T22) by increasing the melting point of the formed slag on the outside tubes surface, through the formation of new compounds with protective properties to the metal surface. The study included measuring corrosion rates at different temperatures with and without additive use with various periods of time, through crucible test method and weight loss technique.
A mathematical model represents the relation between corrosion rate and the studied variables, is obtained using statistical regression analysis. Using this model, the best additive to ash weight ratio was specified. Then scanning electron microscopic images taken to the two treated and untreated samples with additive to study the difference in nature of slag formed on the metal surface to the two cases.
References
[2] Krause H.H., "Combustion Additives for Pollution Control", EPA, Report 600/2-77-6089, 1977.
[3] Michele D.P., "Influence of Magnisia Additives on the performance of a Large Power Station Boiler", J. Inst. Energy, June 1986.
[4] May W.R. and Zetlmeisl M.J., "Inhibition of Corrosion in Fuels with Mg/Al/Si Combinations", U.S. Patent No. (4,659,339), April 21, 1987.
[5] Hart A.B. and Cuttler J.B., "Deposition and Corrosion in Gas Turbines", Applied Science Publishers Ltd., London, 1973.
[6] Johnson D.M., Whittle D.P. and Stringer J., "Corr. Sci.", 721(15), 1975.
[7] Ashwarth V., "Corrosion, Industrial Problems, Treatment and Control Techniques", Pergamon Press, U.K., 1988.
[8] Ohman M., Bostrom D. and Nordin A., "Effect of Kaolin and Limestone Addition on Slag Formation during Combustion of Wood Fuels", Energy &Fuels 2004, 18:1370-1376.
[9] Lindstrom E., Bostrom D and Ohman M., "Effect of Kaolin and Limestone Addition on Slag Formation during Combustion of Woody Biomass Pellets", 14th European Biomass Conf. and Exhibition, Paris, France 17-21.
[10] Tran K.O., Iisa K., Steenari B.M. and Lindqvist O., "A Kinetic Study of Gaseous Alkali Capture by Kaolin in the Fixed Bed Reactor Equipped with an Alkali Detector ", Fuel, 2005, 84:169-175.
[11] Boman C., Bostrom D. and Ohman M., "Effect of Fuel Additive Sorbents (Kaolin and Calcite) on Aerosol Particle Emission and Characteristics During Combustion of Pelletized Woody Biomass", 16th European Biomass Conference & Exhibition, 2-6 June 2008, Valencia, Spain.
[12] Zeuthen J.H., Jensen P.A., Jensen J.P. and Livbjerg H., "Aerosol Formation During the Combustion of Straw with Addition of Sorbents", Energy and Fuels 2007; 21:699-709.
[13] Brunner T., "Aerosols and Coarse Fly Ashes in Fixed Bed Biomass Combustion", Doctoral Thesis, Technical University of Eindhoven, Eindhoved, Nederlands, 2006.
[14] Ailor W.H., "Handbook on Corrosion Testing and Evaluation", John Wiely & Sons, Inc., 1971.
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