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Chapter 15

Chapter 15. Nonrenewable Energy: Coal. Objective:. Evaluate the use of coal as an energy resource. Oil and natural gas. Floating oil drilling platform. Coal. Oil storage. Geothermal energy. Contour strip mining. Oil drilling platform on legs. Hot water storage. Oil well. Gas well.

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Chapter 15

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  1. Chapter 15 Nonrenewable Energy: Coal

  2. Objective: • Evaluate the use of coal as an energy resource.

  3. Oil and natural gas Floating oil drilling platform Coal Oil storage Geothermal energy Contour strip mining Oil drilling platform on legs Hot water storage Oil well Gas well Geothermal power plant Pipeline Mined coal Valves Area strip mining Pipeline Pump Drilling tower Underground coal mine Impervious rock Oil Natural gas Water Water is heated and brought up as dry steam or wet steam Water Water penetrates down through the rock Coal seam Hot rock Magma Fig. 16-2, p. 357

  4. COAL • Buried remains of ancient land plants. • Types

  5. Coal as an energy resource Waste heat Cooling tower transfers waste heat to atmosphere Coal bunker Turbine Generator Cooling loop Stack Pulverizing mill Condenser Filter Boiler Toxic ash disposal

  6. Reserves • Coal reserves in the United States, Russia, and China could last hundreds to over a thousand years. • U.S.-27%; Russia-17%; China-13% • 2005, China + U.S. = 53% global coal consumption.

  7. Trade - Offs • Abundant • Not versatile • Ginormus environmental impact (mining) • CO2, S, N, and Hg

  8. Clean Coal • Dec. 2008, TN • Coal sludge retention pond burst

  9. Raw coal Remove dust, tar, water, sulfur Recover sulfur Air or oxygen Clean methane gas Raw gases Steam + O2 2CO 2C Coal Pulverizer Recycle unreacted carbon (char) CO + 3H2 CH4 + H2O Methane (natural gas) Slag removal Pulverized coal Coal Synfuel • Natural gas (SNG or syngas) and liquid. • Cleaner • Costs are high • Added CO2

  10. Forgive us our syns • CO2 not regulated • Costs • U.S. unlikely

  11. How Would You Vote? • Should coal use be phased out over the next 20 years? • a. No. Coal is an abundant energy source and we should continue to develop clean ways to use it. • b. Yes. Mining and combusting coal create serious environmental impacts.

  12. Objective: • Evaluate the use of coal as an energy resource.

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