Advanced Amine-Based Carbon Capture for Low-Concentration CO₂ Sources

Pentair’s Advanced Amine Technology enables efficient carbon dioxide capture from nearly any fossil fuel-based gas stream, including heavy fuel oil, and natural gas combustion, as well as non-power sources like lime kilns.

At the heart of the process is high-concentration monoethanolamine (MEA), a primary amine that chemically absorbs CO₂ even at low partial pressures, making it ideal for flue gas applications. The absorbed CO₂ is released in a stripper column by heating the MEA solution, reversing the absorption reaction. This produces a gas stream with approximately 99% CO₂, which can be purified and liquefied to meet stringent food and beverage standards, such as those set by ISBT.

Pentair’s AAT plants feature:

• Flue Gas Scrubbing: SO₂ is removed via soda ash dosing, with pH-controlled monitoring.
• Absorber Column: Flue gas flows counter-current to the MEA solution, allowing chemical absorption of CO₂.
• NOxFlash Column: Optimizes yield by removing contaminants from the rich MEA solution – without the need for costly chemicals.
• Stripper column: Releases CO₂ from the MEA solution through thermal regeneration.
• CO₂ Compression & Drying: CO₂ is compressed to 15 - 18 bar(g), dried to -60°C dew point, and filtered to remove odor and acetaldehyde.
• Final Purification & Liquefaction: Non-condensable gases are purged, CO₂ is condensed and distilled before stored in insulated tanks at -27° to -21°C.
   
• Automated Operation: PLC-controlled systems ensure reliable, 24/7 performance with minimal manual intervention.
• Efficient Installation: Pre-wired and factory-tested skids reduce on-site commissioning time.
• MEA Solvent Management: A patented purification system allows use of high-O₂ flue gas without degradation or corrosion – no inhibitors required.

The result is ultra-pure CO₂ (>99.99% v/v), suitable for food and beverage applications, with significant operational savings compared to traditional generation methods.