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How Regenerative Froth Contactor Works

 

Standard industry practice has been to use counterflow contactors.

 

However, the Regenerative Froth Contactor (RFC) is a co-flow design. That means the gas and liquid both flow downward through the contactor.

 

The internal structure includes a proprietary convoluted screen system that establishes an unstable flow pattern.

 

Pulsing waves of froth are repeatedly created and collapse as they pass downward through the column.

 

The gas flows much faster than the waves of froth, so each unit of gas passes through multiple froth bands as it passes from inlet to outlet.

 

Millions of fine bubbles and droplets in the transient froth generate the surface area rather than the ‘packing’ used in conventional contactors.  The dynamic environment ensures complete mixing of and between liquid and gas.

 

As a result of the turbulence and superior surface area, four to five times the quantity of carbon dioxide transfers from the gas to the liquid solvent within the same volume.

 

This improved mass transfer rate allows for a much smaller column size than for conventional approaches, reducing the column height and footprint by half.