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Evolved gas analysis (EGA) of brick clays

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Abstract

Using a system based on non-dispersive infrared (NDIR) detectors, evolved gas analysis (EGA) was able to identify and quantify the principal volatiles produced by heating powdered samples of UK brick clays. From these results, atmospheric emissions likely to result from brick production can be predicted. In addition, EGA results for extruded brick clay test pieces are significantly different from those of powdered samples. Within an extruded brick clay body, evolved gases are contained within a pore system and evolved gas-solid phase reactions also occur. This EGA study provides further evidence on the nature of firing reactions within brick clay bodies. The qualitative and quantitative influence of heating rate — a key process condition in brick manufacture — on gas release is also outlined.

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Author notes

  1. A. J. Parsons

    Present address: Dames & Moore, 26, Wanner Street, EH3 7HR, Edinburgh

Authors and Affiliations

  1. Geology Department, Leicester University, University Rd, LE1 7RH, Leicester

    A. J. Parsons & A. C. Dunham

  2. Mineralogy and Petrology Group, British Geological Survey, NG12 5GG, Nottingham, UK

    S. D. J. Inglethorpe & D. J. Morgan

Authors
  1. A. J. Parsons
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  2. S. D. J. Inglethorpe
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  3. D. J. Morgan
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  4. A. C. Dunham
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Dedicated to Dr. Robert Mackenzie on the occasion of his 75th birthday

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Parsons, A.J., Inglethorpe, S.D.J., Morgan, D.J. et al. Evolved gas analysis (EGA) of brick clays. Journal of Thermal Analysis 48, 49–62 (1997). https://doi.org/10.1007/BF01978965

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