Carbon Dioxide Removal

• Why is carbon dioxide removal (CDR) important?

  It helps combat global warming
• What is the overall aim of carbon dioxide removal (CDR)?

  To reduce CO2 levels and combat climate change
• What is carbon dioxide removal (CDR)?

  It is the process of cleaning up CO2 pollution
• What is one benefit of carbon dioxide removal?

  It slows down climate change
• How does excess carbon dioxide affect the environment?

  It causes global warming
• What does carbon dioxide removal (CDR) mean?

  Taking excess carbon dioxide out of the atmosphere
• What are the methods involved in carbon dioxide removal (CDR)?

  • Natural processes: trees absorbing CO2
  • Technological approaches: carbon capture from factories
• How does carbon dioxide removal help combat climate change?

  By reducing atmospheric CO2 levels
• How does photosynthesis contribute to carbon dioxide removal?

  It absorbs CO2 to help plants grow
• What are the main technologies involved in the CO2 separation and capture process?

  • Kemisk (Chemical)
  • Fysisk (Physical)
  • Adsorber beds
  • Regeneration methods
  • Gas separation
  • Gas absorption
  • Ceramic systems
• What is mineral weathering's role in carbon dioxide removal?

  It converts CO2 into rocks over time
• What is a consequence of oceans absorbing CO2?

  It affects seawater chemistry
• What are the main steps involved in the CO2 separation and capture process described in the image?

  Post-forbrænding, Pre-forbrænding, OxyFuel-forbrænding, DAC (Direct Air Capture)
• What is the main greenhouse gas discussed in the material?

  Carbon dioxide
• What are the main CO2 capture technologies described in the image and how do they differ?

  • Post-combustion: Captures CO2 from flue gases after combustion
  • Pre-combustion: Captures CO2 before combustion
  • OxyFuel combustion: Combusts fuel in pure oxygen to produce a CO2-rich flue gas
  • Direct Air Capture (DAC): Directly captures CO2 from the atmosphere
• What is the purpose of technological carbon dioxide removal methods?

  To remove CO2 from the atmosphere
• How long does mineral weathering take to convert CO2 into rocks?

  Over long periods
• Which technology in the CO2 separation and capture process involves the use of ceramic systems?

  Ceramic systems
• What are the advantages of biological sequestration?

  Does not discriminate between different downstream usages of biomass, Encourages innovation in the production of biomass
• Which CDR approach is highlighted for its practical limitations?

  Direct air capture
• How do trees contribute to carbon dioxide removal?

  They absorb CO2 from the atmosphere
• What is the second point of application listed in the image?

  Fuel transformation and capture
• Why does technological CDR require careful monitoring and management?

  To prevent unforeseen consequences
• Why is careful accounting necessary in carbon storage?

  To prevent potential cheating
• What is the main process described in the image?

  CO2-separation og -fangst (CO2 separation and capture)
• What are the three main technological carbon dioxide removal methods?

  • Pre-combustion: Capture CO2 before burning fuel
  • Post-combustion: Capture CO2 from exhaust
  • Direct air capture: Capture CO2 from atmosphere
• What is the formula to calculate the area of a circle?

  $\pi r^2$
• What is the post-combustion method used for?

  To capture CO2 from exhaust
• How does Artificial Downwelling differ from Artificial Upwelling as a CDR approach?

  Artificial Downwelling pumps surface water to the deep ocean to store carbon, while Upwelling brings nutrient-rich deep water to the surface
• What is the first point of application listed in the image?

  Biological sequestration
• What ethical concerns are associated with CDR strategies?

  Resource allocation and social impacts
• What is adsorption in the context of CO2 removal?

  Trapping CO2 on surfaces
• How does direct air capture function?

  It captures CO2 directly from the atmosphere
• What is the purpose of Intentional Biomass Sinking?

  • To increase carbon storage in the ocean
• What are the main steps in the CO2 separation and capture process?

  1. Post-forbrænding (Post-combustion)
  2. Pre-forbrænding (Pre-combustion)
  3. OxyFuel-forbrænding (OxyFuel combustion)
  4. DAC (Direct Air Capture)
• What practical limitations exist in CDR approaches?

  Scalability and cost-effectiveness
• What is the third point of application listed in the image?

  Storage
• What are the key considerations in implementing carbon dioxide removal strategies?

  • Environmental risks (e.g., harm to marine ecosystems)
  • Ethical concerns (e.g., resource allocation, social impacts)
  • Practical limitations (e.g., scalability, cost-effectiveness)
  • Need for careful monitoring and management
• What are the advantages and drawbacks of storage?

  Advantages:

  • Encourages delivery of captured carbon all the way to storage

  
  

  Drawbacks:

  • Similar to (2), careful accounting may be necessary to prevent cheating, for example through re-labelling
• Which technology is used to directly capture CO2 from the atmosphere?

  DAC (Direct Air Capture)