Lecture 8 – Coal (Part 1)

Lecture 8 – Coal (Part 1) - Lecture 8 Coal...

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Lecture 8 – Coal (Part 1) Coal Characteristics Coal is a fossil fuel composed mainly of carbon of biologic origin, mainly plants. Coal contains “bound” water, minerals (ash), sulfur, nitrogen, oxygen, and some toxic metals (mercury and arsenic). Coal is highly variable in its properties Properties of coal depend on its thermal and pressure history. Chemical and physical variability the energy content is difficult to estimate precisely. Energy content (= carbon content) increases for the various forms: o Lignite (~30 wt.%) o Bituminous (40-60 wt.%) o Anthracite (up to 85 wt.%) Present consumption levels, world reserves are estimate to last for 250 to 300 years. World Electricity Generation Highest to Lowest o Coal (39%) o Natural Gas (20%) o Nuclear (16%) o Hydro (16%) o Oil (7%) o Renewables (2%) Coal: Production and Consumption Coal Flow o Input Surface Underground o Output Electric Power Industrial Commercial Residential Coal Overview o Production (1161) o Consumption (1114)
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Lecture 8 – Coal (Part 1) - Lecture 8 Coal...

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