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A method to simultaneously determine sorption isotherms and sorption enthalpies with a double twin microcalorimeter

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Author

Summary, in English

Sorption of vapors of water, ethanol, and other liquids on solids like pharmaceuticals, textiles and food stuffs are of both practical and theoretical importance. In this article we present a technique to simultaneously measure sorption isotherms and sorption enthalpies. The sample is contained in one end of a sorption vessel. In the other end a vaporizable liquid is introduced to start the measurement. Mass transfer from the liquid to the sample is by vapor diffusion and the rate of mass transfer is calculated from the measured thermal power of vaporization. Simultaneously, the thermal power of sorption is measured and from this one may calculate the differential enthalpy of sorption. The thermal power measurements are made by inserting the sorption vessel in an isothermal double twin microcalorimeter.

Publishing year

2002

Language

English

Pages

2743-2754

Publication/Series

Review of Scientific Instruments

Volume

73

Issue

7

Document type

Journal article

Publisher

American Institute of Physics (AIP)

Topic

  • Materials Engineering
  • Physical Chemistry

Status

Published

ISBN/ISSN/Other

  • ISSN: 1089-7623