Kinetic model of adsorption on crystal surfaces.
Kinetic model of adsorption on crystal surfaces.
复制标题
晶体表面吸附的动力学模型。
DOI：
--
复制
发表时间：
2019
影响因子：
2.4
通讯作者：
V. Giovangigli
中科院分区：
文献类型：
--
作者：
K. Aoki;V. Giovangigli
介绍了一个描述气体颗粒在晶体表面物理吸附和化学吸附的动力学理论模型。一个单一的动力学方程被用来模拟气体和物理吸附粒子与晶体势相互作用，并与声子碰撞。假设声子处于平衡状态，并且物理吸附剂-气体方程耦合到描述表面化学吸附颗粒和晶体原子的类似动力学方程。对耦合系统引入了动力学熵，建立了H定理。采用Chapman-Enskog方法和流体标度，研究了吸附质的渐近结构，并从动力学模型导出了流体边界条件。
A kinetic theory model describing physisorption and chemisorption of gas particles on a crystal surface is introduced. A single kinetic equation is used to model gas and physisorbed particles interacting with a crystal potential and colliding with phonons. The phonons are assumed to be at equilibrium and the physisorbate-gas equation is coupled to similar kinetic equations describing chemisorbed particles and crystal atoms on the surface. A kinetic entropy is introduced for the coupled system and the H theorem is established. Using the Chapman-Enskog method with a fluid scaling, the asymptotic structure of the adsorbate is investigated and fluid boundary conditions are derived from the kinetic model.