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Prevention of dioxins de novo formation by ethanolamines

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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.

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Acknowlegments

The authors would like to thank Mr. J.-M. Brouhon from the C.R.M (Centre de Recherches Metallurgiques de Liege) for interesting discussions, as well as C. Nadin for performing some of the experiments. C. Xhrouet was funded as fellow by the F.N.R.S (Fonds National de la Recherche Scientifique Belge).

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Authors and Affiliations

  1. Mass Spectrometry Laboratory, University of Liège, B6c Sart Tilman, B 4000, Liège, Belgium

    Céline Xhrouet & Edwin De Pauw

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  1. Céline Xhrouet
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  2. Edwin De Pauw
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Correspondence to Céline Xhrouet.

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C Xhrouet: Recipient of the 2001 ACE Environmental Chemistry Award

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Xhrouet, C., De Pauw, E. Prevention of dioxins de novo formation by ethanolamines. Environ Chem Lett 1, 51–56 (2003). https://doi.org/10.1007/s10311-002-0011-6

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  • DOI: https://doi.org/10.1007/s10311-002-0011-6

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