Thai country has attempting to find ways to improve the quality of coal in energy production efficiency has increased, because coal is the energy source that has a relatively low cost. As well as a source of energy that has accumulated enough quantity to be processed into energy we can use. In the study of geological characterization of coal, this would allow us to develop and improve the system in order to bring power from coal is used efficiently and safely in the future.This study was conducted to learn about the review document: the characterization of geological samples of coal. Study of data collected by the relevant research documents between 2547 (2004) – 2557 (2014) and select an interesting research. The number of Thai language English 5 5 total number of 10 original original study found that factors appreciated analysis: moisture of coal, chemical composition of coal, heating value of coal. Where the above factors to analyze the quality of coal, as coal quality and factors that affect the quality of the coal has 2 factors: 1. The depth of the stone floor and geological time. 2. malfunction of the structure can be seen that the coal source structure affect the quality and composition of coal Quality study of the National Coal Inventory (NaCQI) that concluded that coal in each region will look different.
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