10F_r_Energy_Resources

10F_r_Energy_Resources - Coal,Oil,Naturalgas

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Fossil Fuels Coal, Oil, Natural gas Use energy stored in ancient plant/animal remains “fossilized” energy Non-renewable resource
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Energy Resources
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Coal Forms from large accumulations of undecayed plant material - needs to get buried in oxygen-poor environments typically forms in swamps - rapid burial of plants
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           Coal With deeper burial (Grade of coal increases): Amount of recognizable plant material decreases Water, O, H decrease Relative amount of C increases (blacker) Coal burns hotter
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peat lignite bituminous anthracite
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Coal seams
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360-300 m.y. ago
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Methods of coal mining
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Coal Present: provides ~23% of energy in U.S. Advantages easy to extract does not need to be refined Disadvantages Burns less efficiently than oil/gas Produces air pollutants that are expensive to clean esp. Sulfur oxides Pro duc e s  C O 2  emissions  
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 (found together) Originate from partially decomposed organisms  - form in  marine  (ocean) setting w/ abundant biological activity - protected from decay by burial & lack of oxygen - burial heats rock and converts organic matter first into… Kerogen  - thick, waxy substance (@T <~60°C) made of long hydrocarbon chains Then into   (@T ~60°-120°) by breaking apart chains At T of ~120° to 200°  natural gas  is produced
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10F_r_Energy_Resources - Coal,Oil,Naturalgas

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