No abstract

To address climate change, power plants need to switch to greener fuels. One possible fuel is biomass; a carbon neutral/low carbon fuel. Howeverbiomasses' chemistries are both different from coal's and vary depending on theirsources, containing unique levels of the trace elements (e.g., Cl and S) capableof altering the degradation of heat-exchangers. As such, an understanding ofthe effects of these variations on fireside corrosion is needed. Laboratorytesting exposed alloys T91 and TP347HFG in a simulated agricultural productcombustion environment at 600°C (up to 1000h; 100h cycles). Three differentdeposits mixtures were investigated (comprised of KCl, K2SO4, Na2SO4, CaSO4 indifferent percentages) mimicking accelerated corrosion from different biomasses.Corrosion behaviour was found to be dependant on both alloy and deposit chemistries,with the two materials showing different responses. The deposit with lowest KClshowed lowest corrosion damage, while the highest KCl deposit showed moreaggressive behaviour.