Reduction of the energy requirement and increasing the capacity are the main objectives.

Increasing the capture rate is not a major requirement.

The current developments of pilot-scale DAC systems are significant in developing countries.

Energy consumption in DAC systems is constant for different DAC technologies at the pilot-scale.

The scalability and flexibility aspects of DAC are low.

By capturing carbon dioxide, DAC provides accountability in carbon offset strategies.

Even capturing very high amounts of carbon dioxide, DAC does not contribute to negative emissions.

Large fans are not compulsory in DAC processes.

Air volume captured by DAC systems is lower than that injected for an absorber as flue gas to capture one tonne of carbon dioxide.

There are significant challenges when deploying DAC systems on a large scale.

Air movement of DAC systems requires energy since carbon capture from the atmosphere is targeted.

It is not feasible to power DAC systems using fossil fuels.

Liquid solvents are used to facilitate the carbon capture.

Compared to conventional absorption, solvent regeneration is not required.

High capture efficiency is one of the advantages of absorption-based DAC systems.

Strong alkaline solutions are employed in absorption-based DAC systems.

Capturing other impurities is beneficial for the overall system efficiency.

They operate at relatively lower temperatures compared to absorption-based systems.

Captured air is passed through a fixed bed or rotating contactor containing the liquid sorbents.

Adsorbent degradation is a minor issue that affects the overall system efficiency.

Infrastructure development can be carried out at a later stage for DAC systems.

The selectivity of sorbents is not a significant factor.

Energy consumption should be significantly reduced.

Energy generation from DAC systems is beneficial for process economics.

Industrial emissions are high in developing countries.

Public-private partnerships are satisfactory in developing countries.

The lack of policy development targeting DAC is a significant drawback.

Additional plants are unnecessary, considering the number of pilot-scale plants in developing countries.