LAUSR

Chlorine, as the harmful element with high volatility and reactivity existing in certain coal and biofuels, mainly contributes to severe deposit formation and high-temperature corrosion. Sha Erhu (SEH) coal is characterized with high amounts of alkali metal (mainly sodium, Na) and chlorine (Cl) and relatively smaller amounts of sulfur (S), which is close to the characteristics of biomass. However, the proportion of ash and mineral in most biomass is far lower than that in coal, while the volatile and potassium (K) content is typically higher. In light of these distinct corrosive elements, comparative investigation of the high-temperature corrosion characteristics of boiler steels (T91, 12Cr1MoVG, and TP347H) firing high- or low-chlorine coal and biomass is meaningful. A series of 168 h corrosion experiments involving SEH ash, Da Nahu (DNH) ash, straw ash, wood chip ash, and their mixtures were performed on the tube furnace with the designing a new type of double-tube corrosion probe to consider temperatur...