Kinetic Accessibility of Porous Material Adsorption Sites Studied through the Lattice Boltzmann Method

详细信息    查看全文

• 作者：Jean-Mathieu Vanson ; François-Xavier CoudertMichaela Klotz ; Anne Boutin
• 刊名：Langmuir
• 出版年：2017
• 出版时间：February 14, 2017
• 年：2017
• 卷：33
• 期：6
• 页码：1405-1411
• 全文大小：506K
• ISSN：1520-5827

文摘

We present here a computational model based on the lattice Boltzmann scheme to investigate the accessibility of active adsorption sites in hierarchical porous materials to adsorbates in a flowing liquid. By studying the transport and adsorption of tracers after they enter the pore space of the virtual sample, we characterize their kinetics as they pass through the pore space and adsorb on the solid–liquid interface. The model is validated on simple geometries with a known analytical solution. We then use it to investigate the influence of regular grooves or disordered roughness on the walls of a slit pore geometry, looking at the impact on adsorption and transport. In particular, we highlight the importance of adsorption site accessibility, which depends on the shape and connectivity of the pore space as well as the fluid flow profile and velocity.