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  • Bond Energy of Adsorbed and Interlayer Water: Kerolite Dehydration at Elevated Pressures

  • Anna Kokines Miller, Stephen Guggenheim, August F. Koster van Groos
  • Journal:
    Clays and Clay Minerals / Volume 39 / Issue 2 / April 1991
    Published online by Cambridge University Press:
    02 April 2024, pp. 127-130
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  • The dehydration reaction of kerolite was investigated using high-pressure differential thermal analysis at pressures as high as 600 bars. The peak associated with the dehydration is broad, suggesting the presence of a series of overlapping reactions ranging from the release of adsorbed water to interlayer water. The peak temperature is 136°C at 1.8 bars and increases to 516°C at 586 bars. The primary reaction represents loss of adsorbed water having a bond energy of 1.5 ± 1 kJ/mole. A small amount of water may be present as interlayer water and has a bond energy of 7.5 ± 3 kJ/mole.