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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Yrjas, Patrik
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024Analytical and applied pyrolysis of challenging biomass feedstockscitations
- 2024Analytical and applied pyrolysis of challenging biomass feedstocks:Effect of pyrolysis conditions on product yield and compositioncitations
- 2023Cold-end corrosion caused by hygroscopic ammonium chloride in thermal conversion of biomass and wastecitations
- 2021Formation of NH4Cl and its role on cold-end corrosion in CFB combustion
- 2021Superheater deposits and corrosion in temperature gradient – Laboratory studies into effects of flue gas composition, initial deposit structure, and exposure timecitations
- 2020Application of bipolar electrochemistry to accelerate dew point corrosion for screening of steel materials for power boilerscitations
- 2018Experimental and modeling approaches to simulate temperature-gradient induced intradeposit chemical processes with implications for biomass boiler corrosion
- 2017The effect of temperature on the formation of oxide scales regarding commercial superheater steelscitations
- 2017The influence of flue gas temperature on lead chloride induced high temperature corrosioncitations
- 2017Causes of low-temperature corrosion in combustion of bituminous coal
- 2014Changes in Composition of Superheater Deposits due to Temperature Gradients
- 2012High temperature corrosion of boiler waterwalls induced by chlorides and bromides. Part 2:Lab-scale corrosion tests and thermodynamic equilibrium modeling of ash and gaseous speciescitations
- 2011Performance of superheater materials in simulated oxy-fuel combustion conditions at 650°C
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article
The influence of flue gas temperature on lead chloride induced high temperature corrosion
Abstract
Firing of waste-based fuels increases the risk for heavy metal-induced corrosion in the furnace walls and in other low-temp. heat transfer surfaces, such as primary superheaters. Lead-contg. compds., esp. alkali lead chlorides, were detected in the boiler water walls, causing severe corrosion. Corrosion rate of chlorine-induced corrosion is known to be dependent on the material temp. and the objective of this work was to study the influence of the flue gas temp. on lead chloride-induced corrosion. The expts. were carried out with full-scale corrosion probe and deposit probe measurements in a recycled wood firing CFB boiler. The material used in the corrosion probe measurements was low alloy steel EN10216-2 16Mo3 and the material temp. was adjusted to 360°. Two corrosion and deposit probes were used in different locations to expose the probes towards hot, 800°, and cooler, 490°, flue gas temps. Changes of the wall thicknesses were measured and the samples were analyzed with SEM/EDS and x-ray diffraction for more detailed deposit characterization. Corrosion was detected in both the hot and the cooler flue gas samples. A low melting (T<sub>0</sub> = 368°) alkali-lead-chloride mixt. was identified. Findings from these measurements strongly indicate this mixt. to be the corrosion-causing compd. at both flue gas temps. However, the corrosion rate was higher in the hot flue gas sample compared to the cooler flue gas sample. A much steeper deposit temp. gradient was calcd. for the hot flue gas sample, suggesting that the alkali-lead-chloride mixt. is in the molten form. These findings, together with the higher proportion of the present alkali-lead-chloride mixt., are the potential factors for the higher corrosion rate in the hot flue gas sample compared to the cooler flue gas sample.