Nonrenewable Energy

1. Energy Resources 2. Oil 3. Natural Gas 4. Coal 5. Nuclear Energy

Primary Energy Resources: The fossil fuels(oil, gas, and coal), nuclear energy, falling water, geothermal, and solar energy. Primary Energy Resources: The fossil fuels(oil, gas, and coal), nuclear energy, falling water, geothermal, and solar energy. Secondary Energy Resources: Those sources which are derived from primary resources such as electricity, fuels from coal, (synthetic natural gas and synthetic gasoline), as well as alcohol fuels. Secondary Energy Resources: Those sources which are derived from primary resources such as electricity, fuels from coal, (synthetic natural gas and synthetic gasoline), as well as alcohol fuels. Energy Sources

1 st law of thermodynamics…energy can not be created or destroyed, just converted from 1 form to another. 1 st law of thermodynamics…energy can not be created or destroyed, just converted from 1 form to another. * 2 nd law of thermodynamics…Energy conversions are not 100% efficient! Thermodynamics

Btu (British thermal unit) - amount of energy required to raise the temperature of 1 lb of water by 1 ºF. Btu (British thermal unit) - amount of energy required to raise the temperature of 1 lb of water by 1 ºF. cal (calorie) - the amount of energy required to raise the temperature of 1 g of water by 1 ºC. Commonly, kilocalorie (kcal) is used. cal (calorie) - the amount of energy required to raise the temperature of 1 g of water by 1 ºC. Commonly, kilocalorie (kcal) is used. 1 Btu = 252 cal = kcal 1 Btu = 1055 J (joule) = kJ 1 cal = J Energy Units and Use

Two other units that are often seen are the horsepower and the watt. These are not units of energy, but are units of power. Two other units that are often seen are the horsepower and the watt. These are not units of energy, but are units of power. 1 watt (W) = Btu / hour 1 horsepower (hp) = 746 W Watt-hour - Another unit of energy used only to describe electrical energy. Usually we use kilowatt-hour (kW-h) since it is larger. Watt-hour - Another unit of energy used only to describe electrical energy. Usually we use kilowatt-hour (kW-h) since it is larger. quad (Q) - used for describing very large quantities of energy. 1 Q = Btu quad (Q) - used for describing very large quantities of energy. 1 Q = Btu Energy Units and Use

U.S. has 4.6% of world population; uses 24% of the world’s energy; U.S. has 4.6% of world population; uses 24% of the world’s energy; – 84% from nonrenewable fossil fuels (oil, coal, & natural gas); – 7% from nuclear power; – 9% from renewable sources (hydropower, geothermal, solar, biomass). Evaluating Energy Resources

Changes in U.S. Energy Use

Energy resources removed from the earth’s crust include: oil, natural gas, coal, and uranium

Fossil fuels originated from the decay of living organisms millions of years ago, and account for about 80% of the energy generated in the U.S. Fossil fuels originated from the decay of living organisms millions of years ago, and account for about 80% of the energy generated in the U.S. The fossil fuels used in energy generation are: The fossil fuels used in energy generation are: – Natural gas- which is % methane (CH 4 ) – Liquid hydrocarbons obtained from the distillation of petroleum – Coal - a solid mixture of large molecules of mostly hydrocarbons. Fossil Fuels

Fossil fuels are nonrenewable resources Fossil fuels are nonrenewable resources – At projected consumption rates, natural gas and petroleum will be depleted before Burning fossil fuels produce large amounts of CO 2, which contributes to global warming Burning fossil fuels produce large amounts of CO 2, which contributes to global warming Problems with Fossil Fuels

1. Energy Resources 2. Oil 3. Natural Gas 4. Coal 5. Nuclear Energy

Deposits of crude oil often are trapped within the earth's crust, extracted by drilling. Deposits of crude oil often are trapped within the earth's crust, extracted by drilling. Crude oil: complex liquid mixture of hydrocarbons, with small amounts of S, O, N impurities. Crude oil: complex liquid mixture of hydrocarbons, with small amounts of S, O, N impurities. Oil

Sources of Oil Organization of Petroleum Exporting Countries (OPEC) countries have 67% world reserves: Algeria, Ecuador, Gabon, Indonesia, Iran, Iraq, Kuwait, Libya, Nigeria, Qatar, Saudi Arabia, United Arab Emirates, & Venezuela Other important producers: Alaska, Siberia, & Mexico.

Oil in U.S. 2.3% of world reserves uses nearly 30% of world reserves; 65% for transportation; increasing dependence on imports.

Low oil prices have stimulated economic growth, they have discouraged / prevented improvements in energy efficiency and alternative technologies favoring renewable resources..edu/beck/esc10 1/Chapter14&1 5.ppt

Burning any fossil fuel releases carbon dioxide into the atmosphere and thus promotes global warming. Comparison of CO 2 emitted by fossil fuels and nuclear power. t

Crude oil is transported to a refinery where distillation produces petrochemicals Crude oil is transported to a refinery where distillation produces petrochemicals – How Oil Refining Works How Oil Refining Works How Oil Refining Works by Craig C. Freudenrich, Ph.D. Oil

1. Energy Resources 2. Oil 3. Natural Gas 4. Coal 5. Nuclear Energy

Natural Gas - Fossil Fuel Mixture 50–90% Methane (CH 4 ) Ethane (C 2 H 6 ) Propane (C 3 H 8 ) Butane (C 4 H 10 ) Hydrogen sulfide (H 2 S)

Sources of Natural Gas Russia & Kazakhstan - almost 40% of world's supply. Iran (15%), Qatar (5%), Saudi Arabia (4%), Algeria (4%), United States (3%), Nigeria (3%), Venezuela (3%); 90–95% of natural gas in U.S. domestic (~411,000 km = 255,000 miles of pipeline).

billion cubic metres

Natural Gas Experts predict increased use of natural gas during this century Experts predict increased use of natural gas during this century

Natural Gas When a natural gas field is tapped, propane and butane are liquefied and removed as liquefied petroleum gas (LPG) When a natural gas field is tapped, propane and butane are liquefied and removed as liquefied petroleum gas (LPG) The rest of the gas (mostly methane) is dried, cleaned, and pumped into pressurized pipelines for distribution The rest of the gas (mostly methane) is dried, cleaned, and pumped into pressurized pipelines for distribution Liquefied natural gas (LNG) can be shipped in refrigerated tanker ships Liquefied natural gas (LNG) can be shipped in refrigerated tanker ships

garnero101.asu.edu/glg101/Lectures/L37.ppt

1. Energy Resources 2. Oil 3. Natural Gas 4. Coal 5. Nuclear Energy

Coal: Supply and Demand Coal exists in many forms (so no chemical formula written for it) Coal exists in many forms (so no chemical formula written for it) Coalification: After plants died they underwent chemical decay to form peat Coalification: After plants died they underwent chemical decay to form peat – Over many years, thick peat layers formed. – Peat is converted to coal by geological events such as land subsidence which subject the peat to great pressures and temperatures.

Ranks/Types of Coal Lignite: A brownish-black coal of low quality (i.e., low heat content per unit) with high inherent moisture and volatile matter. Energy content is lower 4000 BTU/lb. Lignite: A brownish-black coal of low quality (i.e., low heat content per unit) with high inherent moisture and volatile matter. Energy content is lower 4000 BTU/lb. Subbituminous: Black lignite, is dull black and generally contains 20 to 30 percent moisture Energy content is 8,300 BTU/lb. Subbituminous: Black lignite, is dull black and generally contains 20 to 30 percent moisture Energy content is 8,300 BTU/lb. Bituminous: most common coal is dense and black (often with well-defined bands of bright and dull material). Its moisture content usually is less than 20 percent. Energy content about 10,500 Btu / lb. Bituminous: most common coal is dense and black (often with well-defined bands of bright and dull material). Its moisture content usually is less than 20 percent. Energy content about 10,500 Btu / lb. Anthracite: A hard, black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter. Energy content of about 14,000 Btu/lb. Anthracite: A hard, black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter. Energy content of about 14,000 Btu/lb.

PEATLIGNITE garnero101.asu.edu/glg101/Lectures/L37.ppt

BITUMINOUS ANTHRACITE

Main Coal Deposits Bituminous Anthracite Subbituminous Lignite

garnero101.asu.edu/glg101/Lectures/L37.ppt

Advantages and Disadvantages Pros: Most abundant fossil fuel Major U.S. reserves About 300 yrs. at current consumption rates High net energy yield Cons: Dirtiest fuel, highest carbon dioxide Major environmental degradation Major threat to health

Sulfur in Coal When coal is burned, sulfur is released primarily as sulfur dioxide (SO 2 - serious pollutant) When coal is burned, sulfur is released primarily as sulfur dioxide (SO 2 - serious pollutant) – Coal Cleaning - Methods of removing sulfur from coal include cleaning, solvent refining, gasification, and liquefaction Scrubbers are used to trap SO 2 when coal is burned – Two chief forms of sulfur is inorganic (FeS 2 or CaSO 4 ) and organic (Sulfur bound to Carbon)

Coal Coal gasification  Synthetic natural gas (SNG)Coal gasification  Synthetic natural gas (SNG) Coal liquefaction  Liquid fuels DisadvantageDisadvantage –Costly –High environmental impact

1. Energy Resources 2. Oil 3. Natural Gas 4. Coal 5. Nuclear Energy

Nuclear Energy In a conventional nuclear power plantIn a conventional nuclear power plant –a controlled nuclear fission chain reaction –heats water –produce high-pressure steam –that turns turbines –generates electricity.

Nuclear Energy Controlled Chain Reaction neutrons split the nuclei of atoms such as of Uranium or Plutonium release energy (heat)

Controlled Nuclear Fission Reaction cstl-cst.semo.edu/bornstein/BS105/ Energy%20Use%20-%203.ppt

Radioactive decay continues until the the original isotope is changed into a stable isotope that is not radioactive Radioactivity: Nuclear changes in which unstable (radioactive) isotopes emit particles & energy Radioactivity

Types Alpha particles consist of 2 protons and 2 neutrons, and therefore are positively charged Beta particles are negatively charged (electrons) Gamma rays have no mass or charge, but are a form of electromagnetic radiation (similar to X-rays) Sources of natural radiation Soil Rocks Air Water Cosmic rays Radioactivity

Relative Doses from Radiation Sources cstl-cst.semo.edu/bornstein/BS105/ Energy%20Use%20-%203.ppt

The time needed for one-half of the nuclei in a radioisotope to decay and emit their radiation to form a different isotope Half-timeemitted Uranium million yrsalpha, gamma Plutonium yrsalpha, gamma During operation, nuclear power plants produce radioactive wastes, including some that remain dangerous for tens of thousands of years Half-Life

Diagram of Radioactive Decay cstl-cst.semo.edu/bornstein/BS105/ Energy%20Use%20-%203.ppt

Genetic damages: from mutations that alter genes Genetic defects can become apparent in the next generation Somatic damages: to tissue, such as burns, miscarriages & cancers Effects of Radiation

EVR3019/Nuclear_Waste.ppt

1. Low-level radiation (Gives of low amount of radiation) Sources: nuclear power plants, hospitals & universities 1940 – 1970 most was dumped into the ocean Today deposit into landfills 2. High-level radiation (Gives of large amount of radiation) Fuel rods from nuclear power plants Half-time of Plutonium 239 is years No agreement about a safe method of storage Radioactive Waste

Radioactive Waste 1. Bury it deep underground. Problems: i.e. earthquake, groundwater… 2. Shoot it into space or into the sun. Problems: costs, accident would affect large area. 3. Bury it under the Antarctic ice sheet. Problems: long-term stability of ice is not known, global warming 4. Most likely plan for the US Bury it into Yucca Mountain in desert of Nevada Cost of over $ 50 billion 160 miles from Las Vegas Transportation across the country via train & truck

Yucca Mountain EVR3019/Nuclear_Waste.ppt

Plutonium Breeding 238 U is the most plentiful isotope of Uranium 238 U is the most plentiful isotope of Uranium Non-fissionable - useless as fuel Non-fissionable - useless as fuel Reactors can be designed to convert 238 U into a fissionable isotope of plutonium, 239 Pu Reactors can be designed to convert 238 U into a fissionable isotope of plutonium, 239 Pu EVR3019/Nuclear_Waste.ppt

Conversion of 238 U to 239 Pu Under appropriate operating conditions, the neutrons given off by fission reactions can "breed" more fuel, from otherwise non- fissionable isotopes, than they consume EVR3019/Nuclear_Waste.ppt

Reprocess Nuclear Fuel During the operation of a nuclear reactor the uranium runs out During the operation of a nuclear reactor the uranium runs out Accumulating fission products hinder the proper function of a nuclear reactor Accumulating fission products hinder the proper function of a nuclear reactor Fuel needs to be (partly) renewed every year Fuel needs to be (partly) renewed every year EVR3019/Nuclear_Waste.ppt

Plutonium in Spent Fuel Spent nuclear fuel contains many newly formed plutonium atoms Spent nuclear fuel contains many newly formed plutonium atoms Miss out on the opportunity to split Miss out on the opportunity to split Plutonium in nuclear waste can be separated from fission products and uranium Plutonium in nuclear waste can be separated from fission products and uranium Cleaned Plutonium can be used in a different Nuclear Reactor Cleaned Plutonium can be used in a different Nuclear Reactor EVR3019/Nuclear_Waste.ppt

Nuclear Energy Concerns about the safety, cost, and liability have slowed the growth of the nuclear power industryConcerns about the safety, cost, and liability have slowed the growth of the nuclear power industry Accidents at Chernobyl and Three Mile Island showed that a partial or complete meltdown is possibleAccidents at Chernobyl and Three Mile Island showed that a partial or complete meltdown is possible

Nuclear Power Plants in U.S. cstl-cst.semo.edu/bornstein/BS105/ Energy%20Use%20-%203.ppt

Three Mile Island March 29, 1979, a reactor near Harrisburg, PA lost coolant water because of mechanical and human errors and suffered a partial meltdown 50,000 people evacuated & another 50,000 fled area Unknown amounts of radioactive materials released Partial cleanup & damages cost $1.2 billion Released radiation increased cancer rates.

Chernobyl April 26, 1986, reactor explosion (Ukraine) flung radioactive debris into atmosphereatmosphere Health ministry reported 3,576 deaths Green Peace estimates32,000 deaths; About 400,000 people were forced to leave their homes ~160,000 sq km (62,00 sq mi) contaminated > Half million people exposed to dangerous levels of radioactivity Cost of incident > $358 billion

Nuclear Energy Nuclear plants must be decommissioned after yearsNuclear plants must be decommissioned after years New reactor designs are still proposedNew reactor designs are still proposed Experimental breeder nuclear fission reactors have proven too costly to build and operateExperimental breeder nuclear fission reactors have proven too costly to build and operate Attempts to produce electricity by nuclear fusion have been unsuccessfulAttempts to produce electricity by nuclear fusion have been unsuccessful

Use of Nuclear Energy U.S. phasing out Some countries (France, Japan) investing increasingly U.S. currently ~7% of energy nuclear No new U.S. power plants ordered since % of 105 commercial nuclear power expected to be retired by 2015 and all by 2030 North Korea is getting new plants from the US France 78% energy nuclear

Phasing Out Nuclear Power Multi-billion-$$ construction costs High operation costs Frequent malfunctions False assurances and cover–ups Overproduction of energy in some areas Poor management Lack of public acceptance

2) Energy Energy & Mineral resources garnero101.asu.edu/glg101/Lectures/L37.ppt