Temperature
Programmed Adsorption Equilibrium (TPAE) procedure was used to determine the
heats of adsorption of ortho xylene and 1-propanol on
activated carbon at 300 K.
The evolutions of
the surface coverage with the adsorption temperature (θe=f(Ta)) were compared
to the Temkin model in order to determine the heats of adsorption and reveal
the affinity to the surface of activated carbon regarding the polarity of each
adsorbate.
It has been shown
that the heats of adsorption of ortho xylene were Eθ0=100 kJ/mol and Eθ1=62
kJ/mol at 185 Pa, respectively, at low and high surface coverage.
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