Statistical physics modeling of water vapor adsorption isotherm into kernels of dates: Experiments, microscopic interpretation and thermodynamic functions evaluation

Calculation of adsorption isotherms by statistical physics models: a review

“…Therefore, their uptake onto the surface of hexahelicene was promoted at high temperatures, indicating the endothermic nature of the adsorption process. On the other hand, Alyousef et al(2020b) observed that the impact of the cohesion pressure is greater at high temperature, and the co-volume b has an opposite tendency to that of the parameter "a". These observations indicated that the lateral interaction between water vapor molecules was greater at high temperature, which represents an antagonist effect to increase the amount adsorbed and confirms the exothermic nature of the water vapor adsorption onto the kernels of dates.…”

New insights into glyphosate adsorption on modified carbon nanotubes via green synthesis: Statistical physical modeling and steric and energetic interpretations

“…According to Sellaoui et al [42,43,60], this reduction in N m is related to the increase in the number of GLY molecules anchored per site and the degree of aggregation. Alyousef et al [70], Hanafy et al [61], and Sellaoui et al [51] mention that the phenomenon of aggregation controlled the evolution of N m, causing steric hindrance by hindering access to active sites on the adsorbent, since when the number of molecules per site increases, the space available for adsorption on the surface of the adsorbent tends to be reduced. This trend indicates that, at lower temperatures (298 K with 0.5 < n < 1), the number of molecules captured per site was smaller compared to other temperatures, increasing the space available on the surface of the adsorbent and, consequently, the density of the receptor site was higher at this temperature.…”

Application of Innovative Analytical Modeling for the Physicochemical Analysis of Adsorption Isotherms of Silver Nitrate on Helicenes: Phenomenological Study of the Complexation Process

“…The Van der Waals parameters a and b are introduced in the SMRG model in order to ameliorate the physical description of the complexation process of the hexahelicene at high concentration [22, 46]. The behaviors of these parameters via the temperature are illustrated in Figure 4(b).…”

“…On the contrary, it is noted that the rise of the temperature causes a growth of the covolume b which means that the repulsion between the adsorbate ions becomes strong at high temperature. Therefore, it is concluded that the silver ions are quickly captured by the adsorbing surface of hexahelicene at high temperature which explains the high performance of silver adsorption at high temperature and demonstrates the endothermic nature of the complexation process [46]. This suggests that the complexation of the hexahelicene by the silver ions can be carried out without disruptive influences if we increase further the adsorption temperature.…”

“…Physical adsorption (physisorption) is generally a reversible phenomenon so the interaction adsorbate-adsorbent is weak and the presence of an opposite phenomenon (desorption process) is possible. Indeed, the type of the interaction can be classified, to a certain extent, by the magnitude of the change in adsorption energy [46, 49]. The values of the adsorption energies of hexahelicene can be classified into electrostatic bindings [15, 48].…”