An experimental method for determining heat of physical adsorption

Dennis J. Miller, Hong H. Lee

Research output: Research - peer-reviewArticle

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Abstract

A new experimental method is presented for the measurement of the heat of physical adsorption of gases. The method involves thermal desorption of a gas from the solid sample in continuous flow sorptometer. The theoretical development postulates a dynamic equilibrium between adsorbed and free gas at all times during the thermal desorption, allowing calculation of heat of adsorption for a wide range of experimental conditions. The heat of adsorption is calculated from a single experimental run, and is therefore a simpler and quicker way of finding the heat of adsorption than traditional experimental methods. The heat of adsorption for a number of gas-solid systems has been determined, using simple Langmuir kinetics in the dynamic equilibrium model. The functional dependence of heat of adsorption on surface coverage has also been found from the experiments. The results show good agreement with the calorimetrically determined literature values.

LanguageEnglish (US)
Pages281-290
Number of pages10
JournalJournal of Catalysis
Volume81
Issue number2
DOIs
StatePublished - 1983
Externally publishedYes

Profile

Adsorption
Hot Temperature
heat
adsorption
Gases
gases
Thermal desorption
desorption
Kinetics
Experiments
axioms
kinetics

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

An experimental method for determining heat of physical adsorption. / Miller, Dennis J.; Lee, Hong H.

In: Journal of Catalysis, Vol. 81, No. 2, 1983, p. 281-290.

Research output: Research - peer-reviewArticle

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