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The use of TG-FTIR technique for the assessment of hydrogen bromide emissions in the combustion of BFRs

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Abstract

The TG-FTIR technique was used in the present study to investigate the thermal degradation behaviour of materials containing brominated flame retardants under fire conditions. Time-temperature profiles and oxygen concentrations typical of selected fire scenarios were reproduced in the thermogravimetric analyzer, while the characterization of the gaseous products generated was performed by the simultaneous FTIR analysis. FTIR analysis combined with the use of specific calibration procedures allowed the quantitative estimation of the gaseous products evolved as a function of experimental conditions. The results obtained allowed the straightforward assessment and the comparison of the quantities of hydrogen bromide formed in the oxidation and thermal degradation of pure brominated flame retardants and of flame retarded materials of industrial interest. Hydrogen bromide yields resulted dependent on the experimental conditions used, such as oxygen concentration and heating rate. Although TG-FTIR experiments only provide a representation of the actual heterogeneous combustion products in real fire conditions, the coupled TG-FTIR technique proved to be a straightforward experimental methodology allowing one to obtain reference data on the nature and quantities of the macropollutants generated in a fire.

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Authors and Affiliations

  1. Gruppo Nazionale per la Difesa dai Rischi Chimico-Industriali ed Ecologici, Consiglio Nazionale delle Ricerche, via Diotisalvi n. 2, 56126, Pisa, Italy

    F. Barontini

  2. Dipartimento di Ingegneria Chimica, Chimica Industriale e Scienza dei Materiali, Universitá degli Studi di Pisa, via Diotisalvi n. 2, 56126, Pisa, Italy

    K. Marsanich

  3. Dipartimento di Ingegneria Chimica, Mineraria e delle Tecnologie Ambientali, Universitá degli Studi di Bologna, viale Risorgimento n. 2, 40136, Bologna, Italy

    V. Cozzani

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  1. F. Barontini
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  2. K. Marsanich
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  3. V. Cozzani
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Barontini, F., Marsanich, K. & Cozzani, V. The use of TG-FTIR technique for the assessment of hydrogen bromide emissions in the combustion of BFRs. Journal of Thermal Analysis and Calorimetry 78, 599–619 (2004). https://doi.org/10.1023/B:JTAN.0000046122.00243.ed

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