Fireside Corrosion in Oxy-Fuel Combustion of Coal

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The goal is to develop technologies for pulverized coal boilers with >90% CO{sub 2} capture and sequestration and <35% increase in the cost of electricity. Air-fired power plant experience shows a corrosion loss max at 680-700 C. Low melting point alkali metal trisulfates, such as (K,Na){sub 3}Fe(SO{sub 4}){sub 3}, become thermally unstable above this temperature range. Some overall conclusions are: (1) CO{sub 2} + 30% H{sub 2}O more corrosive than Ar + 30% H{sub 2}O; (2) Excess O{sub 2} in H{sub 2}O can, in some cases, greatly increase oxidation; (3) Coal ash is generally innocuous without SO{sub 3}3 in gas ... continued below

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Holcomb, G. R.; Tylczak, J.; Meier, G. H.; Jung, K.; Mu, N.; Yanar, N. M. et al. October 9, 2011.

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The goal is to develop technologies for pulverized coal boilers with >90% CO{sub 2} capture and sequestration and <35% increase in the cost of electricity. Air-fired power plant experience shows a corrosion loss max at 680-700 C. Low melting point alkali metal trisulfates, such as (K,Na){sub 3}Fe(SO{sub 4}){sub 3}, become thermally unstable above this temperature range. Some overall conclusions are: (1) CO{sub 2} + 30% H{sub 2}O more corrosive than Ar + 30% H{sub 2}O; (2) Excess O{sub 2} in H{sub 2}O can, in some cases, greatly increase oxidation; (3) Coal ash is generally innocuous without SO{sub 3}3 in gas phase; and (4) Long-term exposures are starting to establish differences between air-firing and oxy-firing conditions.

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  • 220th ECS Meeting, High Temperature Corrosion and Materials Chemistry 9 — A Symposium in Honor of Professor Robert A. Rapp, Boston, MA, October 9-14, 2011

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  • Report No.: NETL-PUB-183
  • Grant Number: NONE
  • Office of Scientific & Technical Information Report Number: 1039032
  • Archival Resource Key: ark:/67531/metadc833875

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • October 9, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 8, 2016, 4:12 p.m.

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Holcomb, G. R.; Tylczak, J.; Meier, G. H.; Jung, K.; Mu, N.; Yanar, N. M. et al. Fireside Corrosion in Oxy-Fuel Combustion of Coal, article, October 9, 2011; United States. (digital.library.unt.edu/ark:/67531/metadc833875/: accessed July 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.