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Title: Fireside corrosion in oxy-fuel combustion of coal

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.
Authors:
 [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [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)
Publication Date:
OSTI Identifier:
1051404
Report Number(s):
NETL-PUB--228
Journal ID: ISSN 1938-5862; TRN: US201218%%1402
Type:
Accepted Manuscript
Journal Name:
ECS Transactions
Additional Journal Information:
Journal Volume: 41; Journal Issue: 42; Conference: Fireside Corrosion in Oxy-Fuel Combustion of Coal, ECS Transactions, 220th ECS Meeting, Boston, MA (United States), 9-14 Oct 2011; Journal ID: ISSN 1938-5862
Publisher:
Electrochemical Society
Research Org:
National Energy Technology Lab. (NETL), Albany, OR (United States)
Sponsoring Org:
USDOE Office of Fossil Energy (FE)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 01 COAL, LIGNITE, AND PEAT; 20 FOSSIL-FUELED POWER PLANTS; 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