Fossil Fuel Review

Review of Fossil Fuels

Energy Sources Overview

  • Sources of Energy

    • Two main categories:

      • Renewable Energy Sources:

        • Naturally replenished, inexhaustible.

      • Nonrenewable Energy Sources:

        • Not replenished on a human timescale; finite.

  • Factors Affecting Energy Supply:

    • Geological, climatic, and environmental considerations.

Composition and Formation of Fossil Fuels

  • Fossil fuels are derived from ancient biological materials subjected to heat and pressure over millions of years.

  • Types of Fossil Fuels:

    • Coal:

      • Formed from plant remains.

      • Primarily used for electricity generation.

      • Advantages: Ample supply, high net energy.

      • Disadvantages: Significant environmental impacts, air pollution, high CO2 emissions.

    • Natural Gas:

      • Composition: 50-90% methane.

      • Types: Conventional and unconventional.

      • Major reserves located in Russia, Iran, Qatar.

      • Advantages: Cleanest burning fossil fuel, high net energy.

      • Disadvantages: CO2 emissions, potential water contamination, fracking impacts.

    • Oil:

      • Formed from ancient plankton.

      • Refining Process: Involves distillation based on boiling points.

      • Environmental Impacts: Oil spills, CO2 emissions.

      • Geopolitical Aspects: OPEC countries control most reserves.

Comparison between Fossil Fuels

  • Coal vs. Natural Gas:

    • Coal:

      • Abundant supply but higher emissions.

      • Primarily used for electricity generation.

    • Natural Gas:

      • Cleaner burning, less supply, and lower emissions.

      • Versatile uses across various sectors.

Oil Products and Uses

  • Distillation Column:

    • Separates components based on boiling points.

    • Volatile components are collected at the top, while heavier products, such as asphalt, are aggregated at the bottom.

Synthetic Fuels (Syn Fuels)

  • Produced from bitumen or kerogen through synthetic processes to create crude oil.

  • Downside: Lower net energy due to the extensive work required for processing.

Trade-offs of Fossil Fuels

  • Coal:

    • High supply but also results in high emissions.

  • Oil:

    • Provides high net energy with significant environmental pollution.

  • Natural Gas:

    • Clean burning but requires extensive infrastructure.

  • Syn Fuels:

    • Similar to oil but with lower net energy outcomes.

Study Guidelines

  • Review everything covered in the slides.

  • Focus your notes on the following topics:

    • Coal

    • Natural Gas

    • Oil

    • Synfuels