New chemical mechanism explaining the breakdown of protective oxides on high temperature steels in biomass combustion and gasification plants.

ABSTRACT: Biomass is considered a replacement fuel over fossil fuels to mitigate climate change. The switch to biomass in the combustors changes the inorganic chemistry of the flue gases and leads to more severe corrosion of the construction materials of the combustors. The integrity of most high temperature steels relies on the formation of a protective Cr₂O₃ layer on the steel surface at a high temperature environment. The ash compound found on the heavily corroded steel in biomass combustion and gasification plants is KCl, but the mechanism, which triggers the breakdown of the protective Cr₂O₃ layer under the KCl salt is not known. We studied the chemical reactions involved with furnace exposure of KCl and KOH with Cr₂O₃ and identi

SUBMITTER: Blomberg T 

PROVIDER: S-EPMC9062366 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature