FANTASTIC FOSSIL FUELS AND WHERE TO FIND THEM
FOSSIL FUEL ENERGY RESERVES
Coal Energy Reserves
Major countries possessing reserves:
United States
Russia
Australia
China
Estimates suggest that these reserves may last between 100-150 years based on current consumption trends.
Oil Energy Reserves
Major countries possessing reserves:
Venezuela
Saudi Arabia
Iran
Canada
Iraq
Current trends estimate that oil reserves may last about 50 years.
Natural Gas Reserves
Major countries possessing reserves:
Russia
Iran
Qatar
United States
Estimates indicate that these reserves may last between 50-60 years at current consumption rates.
SHALE GAS RESERVES
Fossil fuels are a non-renewable resource and will eventually be depleted.
Short-term economic benefits drive the extraction and utilization of these fuels.
Discovered but unharvested reserves may represent economic benefits to nations.
FUEL TYPES AND LOCATIONS
SUBSISTENCE FUEL
Definition: Fuel sources that can be easily obtained by hand, commonly used in lesser developed countries for cooking and heating.
Common types include:
Wood:
Cost-effective (often free) but contributes to deforestation and habitat loss.
Charcoal:
Produced by heating wood in low oxygen conditions for prolonged periods.
Peat:
Partially decomposed organic matter (e.g., ferns) found in bogs and swamps.
When dried, peat serves as biomass fuel.
COAL
Formation:
Created through the pressurization and sediment deposition of peat (plant matter) over long periods.
There are four types of coal ranked from worst to best based on quality:
Lignite: Brown coal
Sub-bituminous
Bituminous
Anthracite: Highest energy density, yielding more energy when burned due to its carbon composition.
The denser the coal, the more efficient the burning process, producing a hotter, longer-lasting fire.
COAL RANKING CONTINUED
The rank of coal influences its usage and carbon content:
Peat:
Carbon content: < 20%
Lignite:
Carbon content: 20-35%
Sub-Bituminous:
Carbon content: 35-45%
Bituminous:
Carbon content: 45-80%
Anthracite:
Carbon content: > 80%
Isotopic signatures of methane emissions vary by coal type, influencing their environmental impact:
Peat: -70 ± 10%
Sub-Bituminous: -50 ± 20%
Anthracite: -30 ± 10%
NATURAL GAS
Composition:
Primarily made up of methane (CH₄) and constitutes decaying remains of plants and marine animals buried under dense rock layers, under significant pressure over time.
Location:
Found at the top of trapped oil reservoirs, forms under impermeable rock barriers that prevent gas escape.
Characteristics:
Considered the cleanest fossil fuel due to minimal pollutants emitted upon combustion, producing about half the pollutants compared to coal.
CRUDE OIL
Composition and Formation:
Created from decaying organic material under rock layers.
Extraction involves drilling through these layers to pump out liquid oil.
Can also be recovered from tar sands (a mixture of clay, sand, water, and bitumen), a semi-solid form of petroleum.
Extraction processes demand substantial energy and water resources.
FOSSIL FUEL PRODUCTS
Crude Oil undergoes fractional distillation, where it is heated in a furnace, and vapor is separated in a column by different boiling points.
Hydrocarbons with lower boiling points are collected at the top, while those with higher boiling points are collected at the bottom.
Naphtha is a significant product used in plastic manufacturing.
MORE KNOWLEDGE
Gasoline is sold based on octane ratings:
Octane 87 - Standard car fuel.
Octane 89 - More stability for ignition timing.
Octane 91 - Designed for high-performance engines needing stability.
Myth: High octane fuel is superior or cleans engines; usually unnecessary for regular cars but essential for high-performance vehicles.
SPECIALTY FUEL
Diesel Fuel:
Different from standard gasoline octanes, primarily for compression engines and has a smaller market presence in the US.
Adverse effect on regular vehicles, leading to expensive repairs if mistakenly used.
Ethanol Fuels (E10, E15, E85):
Ethanol (derived from corn) mixed with gasoline; flexibility required for specific vehicle types (Flex Fuel cars).
Misuse in standard gasoline vehicles can lead to costly issues;
Identified usually by green pumps or labels indicating ethanol mixes.
FOSSIL FUEL COMBUSTION
Chemical Reaction: Hydrocarbons + O₂ → CO₂ + H₂O
Combustion of hydrocarbons releases energy and carbon into the atmosphere, a key component in understanding the Carbon Cycle.
Various fossil fuels like coal, oil, and natural gas store carbon that is released when burned.
THE GENERAL RULE OF ENERGY PRODUCTION
Create heat via combustion (or nuclear fission).
Utilize a water source to generate steam.
Steam drives the turbine.
Turbine powers the generator.
Electricity is produced by the generator.
Electricity is distributed via power lines to consumers.
THE BAD STUFF: COAL EDITION
Habitat Destruction: Mining often involves clearance of forests, affecting biodiversity.
Pollutants Produced:
Carbon Dioxide (CO₂)
Particulate Matter (PM) can harm respiratory functions in humans and animals.
Toxic Ash containing heavy metals like Lead, Mercury, and Arsenic that contaminate groundwater and food (especially dangerous for pregnant women).
Consequences include Bioaccumulation and Biomagnification effects.
Sulfur Oxides (SOₓ) and Nitrogen Oxides (NOₓ) lead to problems like Acid Rain and Smog.
CLEAN COAL?
Clean Coal technologies aim to reduce pollutants from coal burning.
Techniques include Wet Scrubbers and Coal Washing.
Current focus includes Carbon Capture and Storage (CCS) to capture CO₂ during combustion.
CO₂ is stored underground with a salt solution, but the expense and limitations of capacity present challenges.
WA PARISH GENERATING STATION
Located in Houston, Texas, featured the Petra Nova system capturing around 1.6 million tons of CO₂ annually but was shut down during the COVID-19 pandemic due to falling oil prices.
FINAL STATEMENT ON COAL
Assertion: There is no such thing as clean burning coal, despite claims often sensationalized.
Summary Statement: This assertion was emphasized as an essential point in the discussion.
OIL/PETROLEUM
Extraction Process: Oil is extracted by drilling wells through rock layers to reach deposits.
Common rock types for oil discovery include shale, sandstone, and carbonates.
THE BAD STUFF – OIL/PETROLEUM EDITION
Key issues associated with oil extraction:
Spills: Notable incidents include the Exxon Valdez spill in Alaska and the BP Oil Spill in the Gulf of Mexico.
Habitat loss and environmental fragmentation caused by drilling activities, roads, and pipelines.
FRACKING
Hydraulic Fracturing: A method utilized to extract natural gas, increasing reserves.
Involves injecting pressurized water to crack the rock and release trapped natural gas.
Significantly extends natural gas supply by unlocking resources in shale formations.
THE BAD STUFF – NATURAL GAS EDITION
Environmental impacts:
Depletion of ground and surface waters.
Habitat loss due to extraction activities.
Release of methane (CH₄), a potent greenhouse gas.
Risks of groundwater contamination from potential well leaks.
Increased seismic activity linked to extraction processes.
TAR SANDS
Definition: Tar sands or oil sands are deposits of bitumen from which crude oil can be extracted, requiring greater amounts of water and energy than conventional oil extraction.
Key Location:
Alberta, Canada possesses the world’s largest reserves of oil sands, extending the global oil supply.
THE BAD STUFF – TAR SANDS EDITION
Major environmental concerns:
Habitat destruction due to land clearance for extraction operations.
Biodiversity loss resulting from disruptions.
Groundwater depletion and contamination from tailings may leach harmful substances.
Increased carbon emissions due to high energy demands for extraction and processing operations, contributing to climate change.