Molecular Modeling: a complement to experiment for designing porous materials used in separation technologies by adsorption

In the present study modeling of permeability of open-porosity ceramic materials used in non-polarizing electrodes is addressed. The structure of the material filling the electrode determines the infiltration of the ceramic structure by electrolyte, which influences the efficiency of the electrodes. The composition of electrode material was characterized with Scanning Electron Microscope Hitachi S3500N with EDS detector and the structure was determined with use of XRadia XCT400 tomograph . The complex geometry of porous materials has been designed using procedure based on Laguerre-Voronoi tessellations (LVT). A set of porous structures with different geometrical features has been developed using LVT algorithm. The approach used here allows to investigate the influence of geometrical features such pore size variation on the permeability of studied materials. Pressure drop characteristics of the developed structures has been analyzed using finite volume method (FVM). The results show that permeability of porous materials is strongly related with distribution of pore size. The study exhibits the utility of developed design procedure for optimization of non-polarizing electrodes performance.

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Analysis of Transport Processes for Layered Porous Materials Used in Industrial Applications

Mathematics — Key Technology for the Future ◽

10.1007/978-3-642-55753-8_20 ◽

2003 ◽

pp. 243-251 ◽

Cited By ~ 1

Author(s):

H. Neunzert ◽

A. Zemitis ◽

K. Velten ◽

O. Iliev

Keyword(s):

Porous Materials ◽

Industrial Applications ◽

Transport Processes ◽

Materials Used

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Acoustic performance of countersunk micro-perforated panel in multilayer porous material

Building Acoustics ◽

10.1177/1351010x19886588 ◽

2019 ◽

Vol 27 (1) ◽

pp. 3-20 ◽

Cited By ~ 1

Author(s):

L Yuvaraj ◽

S Jeyanthi

Keyword(s):

Additive Manufacturing ◽

Porous Material ◽

Porous Materials ◽

Transfer Matrix Method ◽

Sound Absorption ◽

Integration Method ◽

Absorption Bandwidth ◽

Acoustic Performance ◽

Hole Profile ◽

Materials Used

This study investigates the acoustic performance of a countersunk micro-perforated panel, along with two distinct porous materials used in a multilayer porous absorber configuration. Additive manufacturing is applied to create sub-millimeter perforation with different hole spacings on polymer micro-perforated panels. Experiments are conducted in an impedance tube, in which the effects of the perforation ratio, air gap, and varying porous layer configurations on the sound absorption capabilities are investigated. For validation, considering the converging hole profile in the micro-perforated panel, an integration method with end correction is used to calculate the tapered section impedance, and the traditional Maa theory is used for the uniform hole. The theoretical impedance of the multilayer absorber is calculated using the transfer matrix method and subsequently compared to the experimental results. The results demonstrate that the countersunk hole micro-perforated panel exhibits a significant improvement in sound absorption, and the introduction of porous materials extends the sound absorption bandwidth. Furthermore, the results indicate that the sound absorption capability depends on the porous material placement in the multilayer absorber configuration.

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