The heat, equilibrium, and kinetics of adsorption of 1-ethoxy-2-propanol vapours on granulated activated carbon were determined simultaneously by a reaction calorimeter SETARAM C80 D at T=298.15 K at various relative vapour pressures (0.1< p/ps<0.8). The adsorption isotherm was correlated by the Freundlich equation. It was observed that the enthalpies of adsorption decrease slightly with increasing of the relative vapour pressure of the adsorptive. The rate of adsorption were calculated from analysis of the heat flux signals and it was found that the mass-transfer coefficient for 1-ethoxy-2-propanol vapours in granulated activated carbon increased with increasing relative vapour pressure of the adsorptive.
Authors:E. Fiani, L. Perier-Camby, G. Thomas, and M. Sanalan
Adsorption isotherms of n-butane on a granulated activated carbon were measured by two different but complementary experimental
methods: calorimetry and gravimetry. Adsorption heats were determined in different ways. For the system studied, the experimental
results prove that the adsorbent offers a homogeneous site distribution. Besides, there can be differences between the adsorption
heat values which might come from the way they are obtained (by calculation or direct measurements).