Interpretation of gas flow mechanisms in anisotropic porous materials in phenomenological terms

The mechanism of gas flow through porous materials and the selected models of the porous structure were analysed. As for the issue of gas flow through porous deposits that is basically discussed in this article, issues of the process were analysed through describing mechanisms of the gas flow in porous structures for the development of a new generation of clean energy sources, especially in the context of the production of biogas or syngas. This study discusses results of experiments on hydrodynamic assessment of gas flow through backbone (skeletal) porous materials with an anisotropic structure. The research was conducted upon materials of diversified petrographic characteristics, both natural origin (rocky) and process materials (char and coke). The study was conducted for a variety of hydrodynamic conditions, using air, as well as for nitrogen and carbon dioxide. The basis for assessing hydrodynamics of gas flow through porous material was a gas stream that results from the pressure forcing such flow. The results of measurements indicate a clear impact of the type of material on the gas permeability, and additionally – as a result of their anisotropic internal structure – to a significant effect of the flow direction on the value of gas stream. The results indicate the compliance of the used calculation method with the result of experiments.