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Title

Evidence of corrosion on metallic surfaces at 500 C and 560 C by metal-potassium trisulphate formation in oxy-co-combustion

AuthorsMayoral Gastón, María del Carmen ; Andrés Gimeno, José Manuel ; Laguarta, Sergio
KeywordsOxy-co-combustion
Potassium trisulphates
Corrosion
Potassium pyrosulphate
Issue Date18-Jun-2016
PublisherElsevier
CitationFuel 183:80-89 (2016)
AbstractThis work explores potassium pyrosulphate (K2S2O7) reactivity with iron, chromium and nickel oxides as simulation of the corrosion risk caused by alkaline deposits in the oxy-fuel co-firing of coal with high KCl biomass. TGA studies confirm the formation of metallic trisulphates (K3Fe(SO4)3, K3Cr(SO4)3 and K2Ni2(SO4)3) at 500 C and 560 C. Selected steels and alloys (P91, 409, 304, 347, 310, I800HT and I617) were pre-oxidised in 5% O2/CO2 for 200 h and the oxidation scales were treated with K2S2O7 to study the mechanism of oxide dissolution by Fe, Cr and Ni trisulphates, and inner sulphidation.
Publisher version (URL)https://doi.org/10.1016/j.fuel.2016.06.064
URIhttp://hdl.handle.net/10261/168179
DOI10.1016/j.fuel.2016.06.064
ISSN0016-2361
Appears in Collections:(ICB) Artículos
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