Paper Titles
Hot Corrosion Monitoring of Waste Incineration Corrosion Processes Using Electrochemical Techniques
p.531
Corrosivity of KCl(g) at Temperatures above Its Dew Point - Initial Stages of the High Temperature Corrosion of Alloy Sanicro 28 at 600°C
p.539
Influence of Chlorine, Sulphur and Water Vapor on High Temperature Corrosion of Fe, Cr, Ni Alloys for Waste Incinerators
p.547
Effect of Alloying Elements on Corrosion Resistance of Ni-Base Cast Alloys in Waste Incineration Environments
p.555
The Influence of Sulfur Additions on the Corrosive Environments in a Waste-Fired CFB Boiler
p.563
An Overview of Metal Dusting in Synthesis Gas Environments
p.571
The Role of Copper in Resisting Metal Dusting of Ni-Base Alloys
p.581
Numerical Analysis and Control of Gas Carburizing under Changes in Gas Compositions
p.589
Microstructures of SiO2 Scales Formed on MoSi2
p.595

The Influence of Sulfur Additions on the Corrosive Environments in a Waste-Fired CFB Boiler

Article Preview

Abstract:

Corrosion/deposition field tests have been carried out in the superheater region of a commercial waste-fired 75MW CFBC boiler using air cooled probes. The influence of material temperature (450-500°C), flue gas temperature, temperature variations (i.e. thermal cycling) and additives to the fuel (elemental sulphur and dolomite) on deposition and corrosion was studied. The results presented here mainly consider the influence of sulphur additions to the fuel. The fuel was a mixture of 50% household waste and 50% industrial waste. After exposure the samples were analyzed by ESEM/EDX, XRD, AAS, FIB and IC. With no additional sulphur, alkali chlorides made up a large part of the deposit/corrosion product layer and in some cases chromate (VI) was detected. It is suggested that the chromate (VI) has formed by reaction of the protective oxide with alkali chlorides in the deposit. Adding sulphur to the fuel changed the composition of the deposits, alkali chlorides being largely replaced by alkali sulphates. No chromates(VI) were detected in the sulphur-added runs. It is suggested that adding sulphur to the fuel may decrease fireside corrosion because it changes the composition of the deposit. Alkali sulphates are much less corrosive than alkali chlorides partly because they do not form chromate(VI).

You might also be interested in these eBooks
High-Temperature Oxidation and Corrosion 2005 View Preview

Info:

Periodical:

Materials Science Forum (Volumes 522-523)

Pages:

563-570

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.522-523.563

Citation:

Cite this paper

Online since:

August 2006

Authors:

J. Pettersson, C. Pettersson, Nicklas Folkeson, Lars Gunnar Johansson, Erik Skog, Jan Erik Svensson

Keywords:

Alkali, Chlorine, Deposit, Field Test, High Temperature Corrosion, Sulphur, Waste

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] Riedl, R., et al., China International Corrosion Control Conference '99. 1999. Beijing, China: China Chemical Anticorrosion Technology Association (CCATA).

Google Scholar

[2] Spiegel, M., Materials and Corrosion-Werkstoffe Und Korrosion, 1999. 50(7): pp.373-393.

Google Scholar

[3] Spiegel, M., A. Zahs, and H.J. Grabke, Materials at High Temperatures, 2003. 20(2): p.153159.

Google Scholar

[4] Grabke, H.J., E. Reese, and M. Spiegel, Corros. Sci., 1995. 37(7): pp.1023-43.

Google Scholar

[5] Montgomery, M., A. Karlsson, and O.H. Larsen, Materials and Corrosion, 2002. 53(2): pp.121-131.

Google Scholar

[6] Nielsen, H.P., F.J. Frandsen, and K. Dam-Johansen, Energy & Fuels, 1999. 13(6): p.11141121.

Google Scholar

[7] Pettersson, J. and H. Asteman, Svensson, J. -E., Johansson, L. -G., Accepted to oxidation of metals.

Google Scholar

[8] Pettersson, C., Pettersson, J., Asteman, H., Svensson, J. E., Johansson, L. G., Accepted to corrosion science.

Google Scholar

[9] Pettersson, J. in Department of Cemical and Biological Engineering. 2005, Chalmers University of Technology: Gothenburg. p.55.

Google Scholar

[10] E Skog, H.H., S Hansson, J-E Svensson, L-G Johansson, C Pettersson, J Pettersson, T Jonsson, M Halvarsson, N Folkeson, H Asteman, M Hagström, J-B-C Pettersson, K Davidsson, K-E Brink, J Tuiremo, T Aspelin, A Wilson, B Heikne, B Arnesson, K Eriksson and P Gerdin. 2004. p.163.

DOI: 10.1016/s1006-706x(08)60048-5

Google Scholar

[11] Asteman, H., et al., Oxidation of Metals, 1999. 52(1-2): pp.95-111.

Google Scholar

[12] Asteman, H., et al., Oxidation of Metals, 2000. 54(1-2): pp.11-26.

Google Scholar

[13] Segerdahl, K., J. -E. Svensson, and L. -G. Johansson, Materials and Corrosion, 2002. 53: pp.247-255.

Google Scholar