Because of human-related activities carbon dioxide is building-up in the atmosphere and causing changes to the climate because of the “greenhouse “ effect. CO₂ in the air is in equilibrium with CO₂ in the oceans’ water which, accounting for 70% of the surface of Planet Earth, constitutes a huge reservoir of carbon. 

In the oceans the CO₂ is present in the form of dissolved CO₂ and hydrocarbonate/carbonate ions. More CO₂ is released into the atmosphere, more CO₂ will be dissolved in the oceans’ water causing acidification of the latter and significant damages to the marine life.  This process can be reversed: if CO₂ is removed from water and sequestrated, more CO₂ will move from the atmosphere (gas phase) to the liquid phase in order to keep the equilibrium.

ZeroGas Vacuum Deaeration technology is an effective solution to remove dissolved carbon dioxide from water.

The technology focuses on a vertical degassing tower that incorporates a storage section. In the vacuum tower, the dissolved carbon dioxide is removed from the liquid phase by creating vacuum conditions. The reduction of the partial pressure in the gas phase is the driving force that moves dissolved carbon dioxide into the gas phase. Vacuum is created in the degassing tower through the action of pumps, either with or without the assistance of additional air-driven ejectors. The water is fed to the top of the degassing tower and falls across metallic or plastic rings to create the highest active surface area for the most effective mass transfer. CO₂ -depleted water is then collected into a storage section while a CO₂-rich gas stream can be collected and refined for CO₂ recovery, sequestration and/or reuse.