Fireside corrosion in oxy-fuel combustion of coal

Journal Article · Mon Aug 01 00:00:00 EDT 2011 · ECS Transactions

DOI:https://doi.org/10.1149/1.4718001· OSTI ID:1051404

Holcomb, Gordon R. ^[1]; Tylczak, Joseph ^[1]; Meier, Gerald H. ^[2]; Jung, Kee Young ^[2]; Mu, Nan ^[2]; Yanar, Nazik M. ^[2]; Pettit, Frederick S. ^[2]

---

1. National Energy Technology Lab. (NETL), Albany, OR (United States)
2. Univ. of Pittsburgh, Pittsburgh, PA (United States); National Energy Technology Lab., Pittsburgh, PA (United States)

Oxy-fuel combustion is based on burning fossil fuels in a mixture of recirculated flue gas and oxygen, rather than in air. An optimized oxy-combustion power plant will have ultra-low emissions since the flue gas that results from oxy-fuel combustion consists almost entirely of CO2 and water vapor. Once the water vapor is condensed, it is relatively easy to sequester the CO2 so that it does not escape into the atmosphere. A variety of laboratory tests comparing air-firing to oxy-firing conditions, and tests examining specific simpler combinations of oxidants, were conducted at 650-700 C. Alloys studied included model Fe-Cr and Ni-Cr alloys, commercial ferritic steels, austenitic steels, and nickel base superalloys. Furthermore, the observed corrosion behavior shows accelerated corrosion even with sulfate additions that remain solid at the tested temperatures, encapsulation of ash components in outer iron oxide scales, and a differentiation between oxy-fuel combustion flue gas recirculation choices.

• Research Organization: National Energy Technology Lab. (NETL), Albany, OR (United States)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• OSTI ID: 1051404
• Report Number(s): NETL-PUB--228
• Journal Information: ECS Transactions, Journal Name: ECS Transactions Journal Issue: 42 Vol. 41; ISSN 1938-5862
• Publisher: Electrochemical Society
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
36 MATERIALS SCIENCE
AIR
ALLOYS
AUSTENITIC STEELS
COAL
COMBUSTION
CORROSION
ENCAPSULATION
FERRITIC STEELS
FLUE GAS
FOSSIL FUELS
HEAT RESISTING ALLOYS
IRON OXIDES
MIXTURES
NICKEL
OXIDIZERS
OXYGEN
POWER PLANTS
SULFATES
WATER VAPOR