A new theoretical approach to multilayer adsorption of polyatomics

Modeling multilayer adsorption of interacting polyatomic species on heterogeneous surfaces

“…As shown in previous work [36,37] for non-interacting k-mers on homogeneous surfaces, the monolayer volume from the BET model diminishes with increasing values of the k-mer size. The data presented in Fig.…”

“…If we analyze the behavior of the open symbols, we are analyzing, essentially, the homogenous case [39] where an already known feature for the homogeneous scenario can be distinguished: the compensation effect of k is lower as k increases, as [37] stated for the non-interacting case. On the other hand, for bp surfaces, the compensation effect increases with k as seen in [39].…”

“…Both the compensation effect for attractive interactions and the underestimation of the monolayer volume for repulsive interactions are more important for 2D systems. Nikitas [40], this work Nikitas [40], this work Dreyfus et al [12] Payne et al [14] Casal et al [15] Grabowski et al [16] García et al [38] Cortés et al [13] Sánchez-Varretti et al [39] Romá et al [37] BET model [6] Lateral interactions…”

“…One way to begin our analysis is to review the behavior of a system of identical particles, which will be adsorbed in a regular lattice of M identical sites of adsorption [37]. The supposition is that, like in the BET model, adsorption is done on the surface of the solid or onto an already adsorbed particle.…”

A simple model for studying multilayer adsorption of noninteracting polyatomic species on homogeneous and heterogeneous surfaces

“…To describe the isotherm, it is necessary to give two functions. [10,12] Let us assume that an analytical expression of the monolayer adsorption isotherm is known, exp (µβ) = λ, being µ the chemical potential and λ (the fugacity) a function of the monolayer coverage θ m = kN m /M. Then, the following equations can be deduced [12]: and…”