Coal is a very heterogeneous solid originating mainly from plant material. Coal is a major source of energy and its quality also depends on its elemental composition. Some elements present in coal can be environmentally hazardous when the coal is burned. In recent years, in the countries using a coal as the main source of energy the issue in the field of environment and ecology has become much stronger than in previous years. The international community began to demand tough measures in the field of non-proliferation of air pollution from the combustion of coal carbon dioxide and other toxic gases in the air. In this case, along with the determination of physical and chemical properties of coal and coal ash, there are quickly need to identify some hazardous elements as sulphur, titan and ash that is harmful to the environment. To fulfill such demands and needs recent years have seen rapid developments and applications of x-ray fluorescence (XRF) techniques in the coal industry. This study concerns sulphur and ash contents of coal samples from Mongolia and Czech Republic by using XRF, which offers several unique advantages over other analytical methods.

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