Secret sauce .....A snippet from a RBC report on AAV.
"Simplistically, how does the Entropy product work? The Entropy system works in a similar manner to the removal of acid gas (H2S+CO2) from sales gas. The Entropy skid-mounted unit is flanged to the engine exhaust of an existing plant, with the exhaust fumes forced/bubbled through a series of trays and proprietary pots and pans in the presence of a 'secret sauce'solvent that extracts CO2. The CO2 is then removed from the sauce and pumped via compressor to a disposal well."