30/01/2023
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Afghan coal is said to be used initially in two existing power plants being operated on imported coal, namely Sahiwal Coal Power (Sahiwal) and China Power Hub Generation Co (Hub), both of 1,320-MW installed capacity each. Total requirement of coal by these power plants is estimated to be 40,000 tons of coal per day depending on coal quality and characteristics. The coal reserves are located in various areas of Afghanistan, and vary from anthracite to lignite, but never tested or analyzed for use in power generation. Physical properties and chemical composition of coal are of great importance to ascertain its suitability for use in power generation. Lignite (brown coal) has low heating value (BTU), and contains high amount of water, up to 70% by weight, resulting in large heat loss due to moisture.
Bituminous coal has high heating value, while subbituminous coal is less efficient source of heat. Both are suitable for use in power generation. Utilization of coal from different areas of Afghanistan however may not be feasible for power generation due to different characteristics and properties of coal extracted from various locations.
Coal needs to be analyzed with regard to its heating value, quality, characteristics, properties, and contents of its volatile matters, fixed carbon, nitrogen, Sulphur, ash and other elements, to determine its suitability and cost effectiveness for power generation. Coal-based power plants are custom-designed, and technology selected depends on coal analysis and characteristics. This means, these power plants will need modifications in their plant configuration to use Afghan coal as fuel.
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