geoengineering explained: the advantages and disadvantages of ambient air capture

Ambient air capture, a form of carbon dioxide sequestration (CDR), involves building large machines that can remove carbon dioxide directly from the ambient air so that the captured CO2 can be stored elsewhere. The three steps of the air capture process are:

  1. Contacting the air
  2. Absorption or adsorption on a sorbent
  3. Recovery of the sorbent

 

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the process of ambient air capture, image credit: carbonengineering.com

 

BENEFITS

DISADVANTAGES

  • Manages emissions originating from any source
  • Full-scale operations are able to absorb significant amounts of carbon, e.g. emissions from 300,000 cars
  • Can remove far more CO2 per acre of land footprint than trees and plants
  • Enables the direct extraction of CO2 from the atmosphere
  • Requires an energy source
  • Large volumes of air must be processed in order to collect meaningful amounts of CO2
  • Expensive

 

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ambient air capture, image credit: centerforcarbonremoval.org

 

see also:

Question: What is geoengineering?

Albedo Enhancement

Space Reflectors
Stratospheric Aerosols

Afforestation
Ambient Air Capture
Biochar
Bioenergy Capture and Sequestration
Ocean Fertilization
Enhanced Weathering
Ocean Alkalinity Enhancement

sources:
Carbon Engineering Ltd. (n.d.). What is air capture? Retrieved from http://www.carbonengineering.com
Lackner, K. S., Brennan, S., Matter, J. M., Park, A.-H. A., Wright, A., & Zwaan, B. v. (2012, June 28). The urgency of the development of CO2 capture from ambient air. Retrieved from http://www.energy.columbia.edu