Aerovation

Process & contact

https://www.airovation-tech.com/

Updated 09/25

Input materials

CO₂ captured at point source from hard to abate industries
Gypsum or Phosphogypsum waste

Output products

Recovered materials:

Phosphogypsum contains various contaminants and impurities, depending on the site and its geographic origin. These contaminants either originate from the naturally mined phosphate ore or remain as residues from the phosphoric acid separation process. In our process, part of these impurities are recovered as raw materials such as sulfuric acid, while most of the heavy metals are immobilized within the calcium carbonate matrix. This stable and non-soluble material is approximately 250 times less soluble than gypsum. Impurity levels are low and allow application in the sectors indicated.

Calcium carbonate for construction/industrial uses.
Ammonium sulfate as nitrogen fertilizer.
Optional sulfuric acid, with closed-loop ammonia recovery (>95%).

Pathogen safety: The process is based on LZD and does not release any waste into the environment

Process description

1.      CO₂ capture from flue gas – Industrial emissions captured and fed directly into a reactor where CO₂ is absorbed into liquid ammonia, forming ammonium carbonate.

2.      Mineralization – Ammonium carbonate reacts with gypsum or phosphogypsum, generating two stable solids: calcium carbonate (permanent CO₂ storage) and ammonium sulfate (fertilizer).

3.      Separation & crystallization – The compounds are crystallized and recovered in forms suitable for industrial or agricultural applications.

4.      Optional thermal step – Ammonium sulfate can be decomposed to produce sulfuric acid; ammonia is recovered and recycled into stage 1

Energy consumption: Moderate-low, mainly for pumping, mixing, drying and solidification, optional thermal decomposition. Waste heat from industry can be integrated to reduce net demand.

The company holds two distinct patent families and leverages decades of accumulated know-how from its technical and scientific team. 

Operating status

The capacity of the current pilots us:

• Input: approx. 100 tonnes/year CO₂ (wet gas basis).
• Input solids: approx. 300 tonnes/year phosphogypsum (as dry material).
• Outputs:
  • Calcium carbonate: 400 tonnes/year (dry).
  • Ammonium sulfate fertilizer: ~600 t/y
  • or optionally sulfuric acid 400 tonnes/year 98%
• Phosphorus content: present mainly in residual PG fractions, ~1–3% P₂O₅ in product streams, split over calcium carbonate and sulfuric acid
• Capacity (under development):
  • Semi-commercial facility (construction phase, 2025–26):
    • 2500 tonnes CO₂/year.
  • Location(s):
    • Mishor Rotem industrial zone, Israel (in collaboration with ICL).
    • Additional pilots under negotiation in Europe and Asia (fertilizer, energy, cement industry).