Open AccessThe Jäntti Approach to Adsorption with Increasing Gas Pressure
Author(s) -
J. A. Poulis,
C. H. Massen,
E. Robens
Publication year - 2002
Publication title -
adsorption science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.682
H-Index - 36
eISSN - 2048-4038
pISSN - 0263-6174
DOI - 10.1260/026361702321705230
Subject(s) - adsorption , chemistry , langmuir adsorption model , thermodynamics , langmuir , sorption isotherm , simple (philosophy) , pressure swing adsorption , langmuir equation , gas pressure , chromatography , petroleum engineering , physics , philosophy , epistemology , engineering
Jäntti introduced a method of calculating equilibrium adsorption from measurements where the pressure of the gas was varied in a stepwise manner. His aim was to shorten the time necessary for a given measurement. The method was applied to gas/solid systems in which simple adsorption processes occurred and where the number of adsorption sites was infinite. The present paper discusses the case where no adsorption is possible on an already occupied site (Langmuir isotherm) while the number of positions available for adsorption is considered limited. The advantages of using a gas pressure that increases linearly with time are evident for studies with this limitation. It is shown that such measurements can also be speeded up using Jäntti's method.