FOSSIL FUEL ENERGY RESERVES

  • Coal Energy Reserves

    • Major countries possessing reserves:
    • United States
    • Russia
    • Australia
    • China
    • Estimates indicate between approximately 100-150 years of coal reserves remaining at current consumption levels.

  • Oil Energy Reserves

    • Major countries possessing reserves:
    • Venezuela
    • Saudi Arabia
    • Iran
    • Canada
    • Iraq
    • Estimates predict about 50 years of oil reserves left based on current consumption trends.

  • Natural Gas Reserves

    • Major countries possessing reserves:
    • Russia
    • Iran
    • Qatar
    • United States
    • Projections suggest about 50-60 years of natural gas supplies at prevailing consumption rates.

SHALE GAS RESERVES

  • Fossil fuels are categorized as non-renewable resources that will eventually be depleted.
  • Economic incentives drive the extraction and usage of fossil fuels despite their finite nature.
  • Reserves that have been discovered but not yet utilized present significant economic opportunities for countries.

FUEL TYPES AND WHERE TO FIND THEM

Subsistence Fuel

  • Defined as accessible fuel sources commonly harvested manually.
  • Primarily utilized in less developed nations for cooking and heating.
  • Common types include:
    • Wood:
    • Economical, potentially free fuel source; however, significant environmental impact, including deforestation and habitat destruction.
    • Charcoal:
    • Obtained by heating wood under low oxygen conditions for an extended duration.
    • Peat:
    • Composed of partially decomposed organic matter found in bogs and swamps.
    • When dried, peat can be utilized as a biomass fuel.

COAL

  • Formation Process:
    • Coal originates from the pressurization and sedimentation of peat (plant material) over extensive periods.
  • Types of Coal
    • Four recognized categories, ranked from least to most desirable based on energy density:
    1. Lignite: Brown coal, lowest grade.
    2. Sub-bituminous: Intermediate quality.
    3. Bituminous: Higher quality.
    4. Anthracite: Highest quality, composed mostly of carbon.
  • Energy Density:
    • Higher energy density implies more energy is released upon combustion.
    • Anthracite, being the densest, produces the highest temperatures and longest burn time, ideal for electricity generation.

COAL CARBON CONTENT AND TEMPERATURE

  • Depth and temperature affect coal type and carbon content:
    • Depth:
      - Less than 0.2 km / Temperature 0-25°C: Peat (Carbon content:
  • Isotopic signatures are also associated with different coal ranks:
    • Lignite: Isotopic signature of CH emissions: -70 ± 10%.
    • Bituminous: Isotopic signature of CH emissions: -50 ± 20%.
    • Anthracite: Isotopic signature of CH emissions: -30 ± 10%.

NATURAL GAS

  • Development Process:
    • Natural gas is derived from the decaying remains of plants and animals, predominantly marine organisms, subjected to pressure and buried under layers of rock over vast time spans.
  • Composition:
    • Composed primarily of methane (CH₄), often found above trapped oil in porous sedimentary rock formations beneath non-permeable layers.
  • Characteristics:
    • Considered the “cleanest” fossil fuel due to minimal pollution factors upon combustion.
    • Emits approximately half the amount of pollutants compared to coal when burned, including negligible particulate matter.

CRUDE OIL

  • Formation:
    • Generated from decayed organic matter, trapped for extended periods beneath rock layers.
  • Extraction Process:
    • Involves drilling through these layers and employing pressure to extract the liquid oil.
    • It can also be obtained from tar sands, which comprise clay, sand, water, and a thick substance known as bitumen (not in liquid form).
  • Energy and Water Intensiveness:
    • The extraction process is notorious for being demanding in energy and water.

FOSSIL FUEL PRODUCTS

  • Crude Oil Conversion:
    • Crude oil undergoes fractional distillation, whereby it is burned in a furnace causing vapor to rise into a column.
    • Various hydrocarbons are separated based on their boiling points—lower boiling point hydrocarbons gather at the top while higher ones settle at the bottom.
  • Application:
    • Products derived include naphtha, which is utilized in the manufacture of plastics.

GASOLINE AND OCTANE RATING

  • Octane Ratings and Their Implications:
    • Octane 87: Standard car fuel, recommended for typical vehicle requirements.
    • Octane 89: Offers increased stability to prevent premature ignition within the engine.
    • Octane 91: Suited for high-performance engines requiring maximum stability.
  • Common Myths:
    • Using higher octane gasoline in standard cars does not result in improved performance or cleaner engines; it merely increases costs without substantial benefit.

SPECIALTY FUELS

  • Diesel Fuel:

    • Distinct from standard octane fuels, primarily used in diesel engines, with a limited market share in the U.S.
    • Warning: Must not be utilized in standard gasoline engines, as it may lead to considerable repair expenses.

  • Ethanol Fuels:

    • Variants include E10, E15, E85, representing increasing concentrations of ethanol (derived from corn) mixed with gasoline.
    • These fuels should only be used in Flex Fuel vehicles; utilizing them in other types may incur substantial repair costs.

FOSSIL FUEL COMBUSTION

  • Chemistry of Combustion:
    • The fundamental reaction can be described by the equation:
      extHydrocarbons+O<em>2ightarrowCO</em>2+H2Oext{Hydrocarbons} + O<em>2 ightarrow CO</em>2 + H_2O
    • Upon combustion, hydrocarbons release energy and carbon dioxide into the atmosphere, contributing to the carbon cycle.

GENERAL ELECTRICITY GENERATION RULE

  1. Combustion or fission creates heat.
  2. Heat transforms water into steam.
  3. Steam rotates a turbine.
  4. The turbine drives a generator.
  5. The generator produces electricity.
  6. Electricity is transmitted through power lines to various destinations.

NEGATIVE IMPACTS OF COAL

  • Environmental Consequences:
    • Habitat destruction, likely requiring clear-cutting for mining operations.
    • Pollution generation, including significant contributions to greenhouse gas emissions such as CO2.
    • Release of particulate matter (PMs) leading to respiratory issues in humans and animals.
    • Toxic ash containing heavy metals (lead, mercury, arsenic) contaminating both ground and surface waters.
    • Impacts include bioaccumulation and biomagnification in food webs.
    • Formation of nitrogen oxides (NOx) and sulfur oxides (SOx), which contribute to issues like acid rain and smog.

CLEAN COAL TECHNOLOGIES

  • Definition and Purpose:
    • Technologies aimed at reducing the environmental impact associated with coal combustion.
    • Methods include wet scrubbers, coal washing, and notably, Carbon Capture and Storage (CCS).
  • Carbon Capture and Storage (CCS) Process:
    • Captures CO2 emissions and injects it into porous rock formations containing a saline solution to chemically bind and secure the CO2 safely underground.
  • Challenges:
    • The process is expensive, and while it can mitigate some emissions, it cannot entirely eliminate pollutants given the vast quantities of coal being burned.

WA PARISH GENERATING STATION

  • Location:
    • Situated in Houston (Greatwood), this facility was among the first to implement a post-combustion capture system named Petra Nova.
    • Effective in capturing approximately 1.6 million tons of CO2 annually.
  • Operational Challenges:
    • The facility had to be suspended during the COVID-19 pandemic due to declining oil prices.

OIL EXPLORATION AND EXTRACTION

  • Extraction Techniques:
    • Oil is extracted by drilling wells through rock layers to access natural deposits.
    • Common geological formations include shale, sandstone, and carbonates for locating oil.

NEGATIVE IMPACTS OF OIL

  • Environmental Challenges:
    • Oil spills have caused significant ecological damage, with notable incidents such as the Exxon Valdez spill in Alaska and the BP Oil Spill in the Gulf of Mexico.
    • Habitat loss and fragmentation associated with infrastructure development (e.g., roads, drilling equipment, pipelines).

HYDRAULIC FRACTURING (FRACKING)

  • Description:
    • A method of extracting natural gas that has effectively increased available reserves.
    • Involves breaking semi-permeable sedimentary rocks, like shale, using pressurized water to release trapped gas.
  • Impact on Natural Gas Supply:
    • Fracking has significantly enhanced the supply and availability of natural gas reserves.

NEGATIVE IMPACTS OF NATURAL GAS

  • Environmental Risks:
    • Depletion of ground and surface water resources.
    • Habitat destruction due to infrastructure development.
    • Methane (CH₄), a greenhouse gas, can be released during extraction processes.
    • Potential for leaks leading to groundwater contamination and increased seismic activity in regions with drilling activities.

TAR SANDS

  • Definition:
    • Tar or oil sands are deposits of bitumen from which crude oil can be extracted, although they require higher inputs of water and energy.
  • Main Location:
    • Canada, particularly Alberta, holds the largest reserves of oil sands worldwide.

NEGATIVE IMPACTS OF TAR SANDS

  • Environmental Consequences:
    • Habitat destruction due to land clearing for roads, extraction sites, and drilling operations.
    • Significant loss of biodiversity within affected ecosystems.
    • Depletion of both ground and surface water resources, with potential water contamination from tailings.
    • Tailings can leach or overflow toxic chemicals, including benzene salts (carcinogens), acids, and hydrocarbons, creating hazardous conditions for flora and fauna.
    • Increased CO2 emissions resulting from the extraction, transport, and refinement processes using fossil fuels.