#12 Fossil Fuels Extraction

Fossil Fuels

Extraction

Overview of Extraction

• Introduction to fossil fuels and critical minerals extraction.

• Context: Both fossil fuels and critical minerals are extracted from the earth and serve as sources for energy generation and storage.

• Discussion points include the environmental and social implications of extraction processes.

Outline

• Greenhouse Gases (GHG) and Climate Change

• Fossil Fuels

  • Coal

  • Oil

  • Natural Gas

• Minerals

Research and Context

Memes Discussion

• Research Task: Examine memes relating to fossil fuels and critical minerals.

• **Questions:

  1. What messages are these memes trying to convey?

  2. Do these images accurately depict the processes and impacts associated with extraction?**

Meme Analysis

• Key Messages:

  • The memes challenge the notion that electric vehicles (EVs) are environmentally superior to fossil fuel-based transport, implying that lithium mining for EV batteries is as harmful, if not worse, than oil sands extraction.

  • Both fossil fuels and critical minerals contribute to extensive land disruption and resource extraction, questioning the idealized views surrounding clean energy solutions such as EVs.

Accuracy of Representations

• Lithium Mining:

  • While lithium extraction can involve large open-pit mines (e.g., in Australia), a substantial amount comes from brine extraction in salt flats, which has varied environmental implications, particularly concerning water use and chemical contamination.

• Oil Sands Extraction:

  • Memes may underrepresent the extensive land clearance and significant carbon emissions associated with oil sands extraction.

• Pipelines vs. Lithium Mining:

  • Pipelines often have a smaller visible footprint compared to mines but bring long-term environmental risks, such as oil spills and habitat fragmentation, which contribute to ongoing fossil fuel use and broader climate issues.

Greenhouse Gases Expansion

Atmospheric Radiation Dynamics

• Incoming Shortwave Radiation (SWR):

  • Natural fluctuations in solar output contribute to incoming SWR.

  • SWR is absorbed by aerosols and the atmosphere or reflected back to space, influencing the energy balance of the earth.

• Outgoing Longwave Radiation (OLR):

  • Greenhouse gases absorb and emit longwave radiation, contributing to the greenhouse effect.

• Aerosols and Chemical Reactions:

  • Aerosols influence both SWR and OLR through various interactions and reactions within the atmosphere.

• Surface Albedo Changes:

  • Factors such as ice/snow cover and vegetation changes can alter surface albedo, impacting the amount of solar radiation reflected back into space.

Global Carbon Cycle

Components of the Cycle

• Interaction between atmosphere, vegetation, soils, oceans, and fossil fuel combustion.

• Carbon fluxes indicate both natural and anthropogenic contributions to the overall carbon cycle.

• Source: Adapted from IPCC findings (Climate Change 2007: The Physical Science Basis).

Global Temperature Change

Analysis Over Time

• Graphical Analysis of Global Temperature Change (°F):

  • Observations on natural and human factors from 1900 to 2000 show the influence of both sets of factors on climate change.

  • Variations between natural and anthropogenic drivers emphasize the significance of human activities in altering climate patterns.

Composition of the Atmosphere

Key Gaseous Components

• Percentage Composition:

  • Oxygen: 20.9%

  • Nitrogen: 78.1%

  • Trace Gases: such as Argon (0.93%), Carbon Dioxide, Methane, Nitrous Oxide, and others.

• Importance of each component in atmospheric chemistry and climate dynamics.

Global Warming Potential (GWP)

Definition and Calculation

• Definition:

  • GWP measures the amount of energy that one ton of a greenhouse gas will absorb relative to one ton of carbon dioxide over a specific time frame (typically 100 years).

• Purpose:

  • Provides a consistent metric to compare the climate impact of various gases, facilitating cohesive greenhouse gas inventories and projections.

CO2 Equivalents (CO2e)

• Definition:

  • CO2e represents the metric tons of CO2 emissions with equivalent warming impact as one ton of other greenhouse gases.

• Utility in environmental policy and climatological assessments.

GWP Values for Different GHGs

Analogy for Understanding GWP

• Analogy of GWP:

  • CO2 as a thin blanket maintaining warmth.

  • Methane acts as a thicker blanket, trapping significantly more heat.

  • Nitrous Oxide serves as an even thicker blanket with substantial warming capability relative to CO2.

The Impact of Greenhouse Gases on Climate

Atmospheric Longevity and Effects

• CO2:

  • Remains in the atmosphere for hundreds to thousands of years, making it a long-lasting climate driver.

• CH4:

  • Shorter atmospheric lifetime (~12 years) but is over 25 times more effective than CO2 at heat trapping over a century (GWP ~25-28).

• N2O:

  • Atmospheric lifetime of about 114 years; it is approximately 298 times more effective than CO2 at heat trapping over a century.

Overview of Fossil Fuels

Definition and Characteristics

• Fossil Fuel:

  • A natural source of energy derived from the remains of ancient organisms that underwent geological transformations over millions of years.

Examples of Fossil Fuels

• Types of Fossil Fuels:

  • Coal

  • Oil

  • Natural Gas

  • Additional derivatives: Kerosene, Propane

Formation Processes of Fossil Fuels

Petroleum and Natural Gas Formation

• Process of Formation:

  • Tiny marine plants and animals died and settled on ocean floors.

  • Burial by layers of silt and sand over millions of years subjected the remains to immense heat and pressure, transforming them into oil and natural gas.

  • Overview of the geological timeline:

  • 100 million years ago to present, explaining the extraction process involving drilling through layers of sand, silt, and rock.

Heat, Time, Pressure in Fossil Fuel Formation

• Relationships in formation:

  • Higher pressure leads to solid coal; higher heat leads to natural gas; moderate conditions yield liquid oil.

  • Source material environment at the time of death significantly influences the type of fossil fuel produced (swamps for coal vs oceans for natural gas and oil).

Critical Minerals and Rare Earth Elements

Overview

• Role in Manufacturing:

  • Critical minerals and rare earth elements are essential for various manufacturing processes, especially in renewable energy technologies and storage.

• Extraction Needs:

  • Similar extraction processes are required for critical minerals as for fossil fuels, leading to environmental and economic considerations.

Distribution and Geological Considerations

• Geological Distribution:

  • Critical minerals are unevenly distributed around the earth, influenced by past tectonic activity and volcanism.

  • Extraction locations could include land deposits and deep ocean areas, raising similar concerns as fossil fuel extraction.

Mineral Extraction Practices – Lithium as a Case Study

Hard Rock Mining

• Extraction Method:

  • Involves mining metals from solid rock formations using tunneling or open-pit methods to access the minerals.

Brine Extraction

• Extraction Method:

  • Metals are extracted from brine found in salt flats, pumped to the surface for evaporation and concentration.

Direct Extraction

• Extraction Method:

  • Wells are drilled to extract brine directly from underground pools, utilizing ion exchange columns for metal concentration.

Comparison and Impact of Extraction Methods

Environmental Impacts of Lithium Extraction

• Comparisons illustrate differing environmental costs and resource efficiencies.

Deep Sea Mining

Considerations

• Environmental Context:

  • While deep sea mining may alleviate some land-based mining challenges, it introduces serious new environmental risks to ocean ecosystems that need to be managed.

Economic Overview of Fossil Fuels vs. Critical Minerals

Comparative Data

• Fossil Fuel Extraction Revenue:

  • Total for petroleum: $951 billion

  • Total for natural gas: $335 billion

• Mineral Mining for Clean Energy

  Mineral Type	Value (USD Billion)
  Copper	91
  Nickel	28
  Lithium	1.5
  Rare Earth Elements (REE)	0.59

• Scale of Fossil Fuel Extraction:

  • Far exceeds the economic size of clean energy minerals.

Fossil Fuel Availability (Reserves)

Future of Extraction

• Long-Term Availability:

  • Current reserves suggest sufficient fossil fuel availability during the contemporary era, but difficulty in extracting deeper reserves may become economically unviable.

• Consumers' Shift Needed:

  • Transition from fossil fuels will not solely be driven by depletion but by changes in behavior, technology costs, and policies promoting renewable energies.

Fossil Fuel Extraction Methods

Processes Involved

• Oil and Natural Gas Extraction:

  • Marked by technologies such as floating oil drilling platforms and onshore drilling operations.

• Coal Mining Practices:

  • Involves surface mining techniques, including mountaintop removal to access coal seams.

Hydraulic Fracturing (Fracking)

• Overview of Fracking Process:

  • High-pressure fluids are injected into rock formations, forming fractures that facilitate gas and oil extraction.

• Components of Fracking Fluid:

  • Typically a mixture of water, sand, and chemical additives.

Fossil Fuel Combustion

Definition and Impact

• Combustion Process:

  • Fossil fuel combustion is the primary method of energy generation, producing around 80% of global energy supply.

• Electricity Generation Example:

  • A coal-powered plant uses combustion to produce steam, driving turbines for electricity generation.

Transportation of Fossil Fuels

Methods and Implications

• Crude Oil Transportation:

  • Generally easy but poses significant spill risks; pipelines serve as the most cost-effective method.

• Natural Gas Transport:

  • Challenges present when transporting across oceans due to its low density but manageable on land via pipelines.

• Coal Movement:

  • Typically transferred through train systems, trucks, or conveyor belts, highlighting logistical complexities in coal transportation.

Conclusion

Final Considerations

• Reflection on Impact:

  • The vast implications of fossil fuel extraction and consumption call for critical examination of environmental and health impacts on local and global scales.

• Future Considerations:

  • The transition to alternative energy sources must account for the economic, environmental, and social fallout from continued fossil fuel dependency.

Questions

• Interactive discussion on the themes presented in the notes, focusing on clarifying complex concepts and addressing any remaining queries regarding fossil fuels, critical minerals, and their implications for climate change and environmental ethics.

Additional Reminders

• Important due dates for assignments and upcoming labs to ensure timely completion of course requirements.