Mechanism and kinetics of hydrogenation of phenol on a palladium catalyst

Toluene and methylcyclohexane adsorption on nickel catalysts

“…Adsorption isotherms for polyatomic compounds, taking into account the screening of adsorbed molecules, were discussed in the literature [15]. Although they can qualitatively describe the experimental data on the coverage dependence as a function of partial pressure, the adsorption coefficient within these models has to decrease with temperature, which is not the case according to our experimental data.…”

Optimum catalyst for two-step heterogeneous catalytic reactions with multi-centered adsorption

“…multi-point attachment on an ideal surface have been derived by Snagovskii [10] and more recently applied to non-ideal surfaces [11,12]. The approach of Snagovskii included the effect of shielding (screening) of sites with increasing coverage in case of adsorbed polyatomic molecules.…”

“…The approach of Snagovskii included the effect of shielding (screening) of sites with increasing coverage in case of adsorbed polyatomic molecules. The surface was characterized [10] by a certain number of elementary sites adjacent to any particular site. If a molecule has an axis of symmetry of σ order the number of arrangements is lowered by a factor of σ.…”

“…As the number of molecules increases, there is an overlapping of forbidden configuration of adsorbed species. Hence the coverage dependence in the form of a screening parameter was introduced [10]. …”

“…Shielding of surface sites upon adsorption of two-centered and fourcentered symmetrical species on a square lattice Following[10] an adsorption isotherm for reactant A is…”