OXY-COMBUSTION ENVIRONMENT CHARACTERIZATION: FIRE-AND STEAM-SIDE CORROSION IN ADVANCED COMBUSTION (original) (raw)

Oxy-fuel combustion is burning a fuel in oxygen rather than air. The low nitrogen flue gas that results is relatively easy to capture CO 2 from for reuse or sequestration. Corrosion issues associated with the environment change (replacement of much of the N 2 with CO 2 and higher sulfur levels) from air-to oxy-firing were examined. Alloys studied included model Fe-Cr alloys and commercial ferritic steels, austenitic steels, and nickel base superalloys. The corrosion behavior is described in terms of corrosion rates, scale morphologies, and scale/ash interactions for the different environmental conditions. Additionally, the progress towards laboratory oxidation tests in advanced ultra-supercritical steam is updated.