Barbero Giovanni, Scarfone Antonio M, Evangelista Luiz R
Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche (ISC-CNR), c/o Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
Molecules. 2022 Nov 5;27(21):7601. doi: 10.3390/molecules27217601.
The kinetics of adsorption phenomena are investigated in terms of local and non-local kinetic equations of the Langmuir type. The sample is assumed in the shape of a slab, limited by two homogeneous planar-parallel surfaces, in such a manner that the problem can be considered one-dimensional. The local kinetic equations in time are analyzed when both saturation and non-saturation regimes are considered. These effects result from an extra dependence of the adsorption coefficient on the density of adsorbed particles, which implies the consideration of nonlinear balance equations. Non-local kinetic equations, arising from the existence of a time delay characterizing a type of reaction occurring between a bulk particle and the surface, are analyzed and show the existence of adsorption effects accompanied by temporal oscillations.
根据朗缪尔型的局部和非局部动力学方程研究吸附现象的动力学。假设样品呈平板状，由两个均匀的平面平行表面限定，使得该问题可被视为一维问题。当考虑饱和和非饱和状态时，分析了时间上的局部动力学方程。这些效应源于吸附系数对吸附颗粒密度的额外依赖性，这意味着要考虑非线性平衡方程。分析了由体相颗粒与表面之间发生的一种反应所具有的时间延迟导致的非局部动力学方程，结果表明存在伴随着时间振荡的吸附效应。
