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A new method for determination of vapour sorption isotherms using a twin double microcalorimeter

Wadsö, Ingemar LU and Wadsö, Lars LU (1996) In Thermochimica Acta 271. p.179-187
Abstract
A new twin heat conduction microcalorimeter for the study of vapour sorption isotherms, sorption enthalpies and the kinetics of sorption has been developed. Each calorimeter has two calorimetric vessels which are connected by a steel tube. The upper vessel (a vaporization chamber) is charged with a vapour forming liquid and the lower vessel (a sorption chamber) contains the sorbent sample. An identical double calorimeter serves as a reference. During a measurement, the liquid in the upper vessel will vaporize and is allowed to diffuse to the sorption vessel. Thermal powers of vaporization and sorption are measured separately. The rate of vapour flow is obtained from a known value for the enthalpy of vaporization. Assuming equilibrium... (More)
A new twin heat conduction microcalorimeter for the study of vapour sorption isotherms, sorption enthalpies and the kinetics of sorption has been developed. Each calorimeter has two calorimetric vessels which are connected by a steel tube. The upper vessel (a vaporization chamber) is charged with a vapour forming liquid and the lower vessel (a sorption chamber) contains the sorbent sample. An identical double calorimeter serves as a reference. During a measurement, the liquid in the upper vessel will vaporize and is allowed to diffuse to the sorption vessel. Thermal powers of vaporization and sorption are measured separately. The rate of vapour flow is obtained from a known value for the enthalpy of vaporization. Assuming equilibrium conditions and applying Fick's law of diffusion makes it possible to calculate the sorption isotherm. Results from test measurements of water vapour sorption on samples of crystalline NaCl and KCl in saturated aqueous solution and on cotton wool are presented. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Thermochimica Acta
volume
271
pages
179 - 187
publisher
Elsevier
external identifiers
  • scopus:0001509514
ISSN
0040-6031
DOI
10.1016/0040-6031(95)02688-6
language
English
LU publication?
yes
id
fc940c8e-e5b5-41f1-9040-e95ce9535561 (old id 1034480)
date added to LUP
2008-02-19 08:44:40
date last changed
2017-04-30 13:50:22
@article{fc940c8e-e5b5-41f1-9040-e95ce9535561,
  abstract     = {A new twin heat conduction microcalorimeter for the study of vapour sorption isotherms, sorption enthalpies and the kinetics of sorption has been developed. Each calorimeter has two calorimetric vessels which are connected by a steel tube. The upper vessel (a vaporization chamber) is charged with a vapour forming liquid and the lower vessel (a sorption chamber) contains the sorbent sample. An identical double calorimeter serves as a reference. During a measurement, the liquid in the upper vessel will vaporize and is allowed to diffuse to the sorption vessel. Thermal powers of vaporization and sorption are measured separately. The rate of vapour flow is obtained from a known value for the enthalpy of vaporization. Assuming equilibrium conditions and applying Fick's law of diffusion makes it possible to calculate the sorption isotherm. Results from test measurements of water vapour sorption on samples of crystalline NaCl and KCl in saturated aqueous solution and on cotton wool are presented.},
  author       = {Wadsö, Ingemar and Wadsö, Lars},
  issn         = {0040-6031},
  language     = {eng},
  pages        = {179--187},
  publisher    = {Elsevier},
  series       = {Thermochimica Acta},
  title        = {A new method for determination of vapour sorption isotherms using a twin double microcalorimeter},
  url          = {http://dx.doi.org/10.1016/0040-6031(95)02688-6},
  volume       = {271},
  year         = {1996},
}