The method to assess the gas flow of a porous bed product derived from underground coal gasification technology

Abstract

The article describes the technical and process aspects of the technology resulting from the thermal processing of coal in an unconventional way. Selected methods of assessing gas permeability through a porous bed, which is characterized by hydrodynamic gas flow, are indicated.The presented measurement results indicate a clear impact of the type of material on gas permeability and the impact of flow directivity on the value of the gas stream. A new method of hydrodynamic assessment of the permeability coefficient was pointed out, which was correlated with selected criteria characteristic for porous materials derived from coal gasification technology.Based on the process assessment of the research results, it was found that it is useful to use such hydrodynamic features as horizontal, vertical and effective gas permeability coefficient. These values can be used to identify technological quality indicators for raw gas, which is a product of Underground Coal Gasification.The reason for writing this article is the current nature of this topic, which results from the observed reason for the so-called clean coal technologies and the development of modern clean energy technologies that give rise to alternative energy sources, especially renewable energy sources.