Prevention of dioxins de novo formation by ethanolamines |
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Authors: | Email author" target="_blank">Céline?XhrouetEmail author Edwin?De Pauw |
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Institution: | (1) Mass Spectrometry Laboratory, University of Liège, B6c Sart Tilman, B 4000, Liège, Belgium, |
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Abstract: | Two inhibitors, triethanolamine (TEA) and monoethanolamine (MEA), were tested for their ability to prevent the de novo formation
of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) on sinter plant fly ash. The amounts of both PCDDs and PCDFs, formed
by thermal treatment of the fly ash, decreased when inhibitors were added. Up to 90% reduction of the PCDD/Fs formation was
reached when 2 wt % monoethanolamine was mixed with fly ash. The temperatures tested, 325 and 400 °C, did not affect the inhibition
activity. However, a longer reaction time, 4 h instead of 2 h, gave higher percentages of PCDD/Fs reduction. The laboratory
results show that ethanolamines reduce the dioxins formation on sinter plant fly ash under various conditions of temperature
and reaction time. Moreover, factory tests performed in parallel at a sinter plant are in good agreement with the laboratory
experiments, thus confirming that the use of ethanolamine inhibitors is an appropriate technique for the prevention of dioxins
emissions from sintering processes.
Electronic Publication |
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Keywords: | Polychlorodibenzo-p-dioxins (PCDDs) Polychlorodibenzofurans (PCDFs) De novo synthesis Inhibition Fly ash Sinter plant |
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