09/02/2023
To achieve a "decarbonized society," different climate change-related activities are currently being carried out throughout the world. Research & Development of relevant technologies are also being actively explored.
While reducing CO2 emissions alone has shown to be ineffective at lowering the atmospheric CO2 concentration, Direct Air Capture (DAC) technology must be used to remove CO2 that has already been discharged into the atmosphere. Although the atmosphere is present on the entire world, major CO2 emission sources, such as thermal power plants, are localized. Based on these properties of air, DAC technology ought to be able to efficiently process a large volume of air while being location-independent.
Due to its substantial processing capacity, liquid absorption is regarded as the primary DAC technology in terms of mass treatment. A capture plant must typically be placed at a specific location for sorbent-based processes. Because recovering CO2 from absorbent, water, and hazardous chemicals typically demands large-scale, inexpensive green energy; which frequently limit installation location; this adsorbent technique may not be well suited given the omnipresent nature of the atmosphere. Particularly across G20 member nations who are responsible for 78% of global CO2 emissions.
The fact that membrane separation systems are adaptable and may be put in different locations is their biggest benefit. Membrane separation method does not need specialized sorbents or chemicals for CO2 capture. These membrane separation features may make Membrane-DAC (m-DAC) the best technology for ubiquitous and ambient DAC. This distinctiveness of m-DAC offers possibilities for CO2 capture that have never been thought of previously.
Joel Gubihama et al. provides a perspective on the ongoing research and attempts of DAC applications using membrane separation to help future researchers in the field.
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