CO2 extraction from boiler systems

CO2 Extraction Plants (EBU) from Union Engineering are based on importing flue gas from boilers fired with fossil fuels such as diesel oil, heavy fuel oil, kerosene, natural gas, LPG or LNG.

The innovative EBU Plants meet the strictest CO2 quality requirements and compared with traditional combustion plants they ensure energy savings up to 45%.

Life long performance

EBU Plants are based on absorption of CO2 from flue gas into a monoethanolamine (MEA) based solution, which is heated by the steam- heated re-boiler to release the raw CO2 gas.

To achieve the best combination of performance and equipment longevity, a 9% MEA /water solution is used. Under this condition, the optimal balance between CO2 load and avoidance of the corrosive effects of MEA are met.

Result-driven technology – NoxFlash and PUR-D

All Union Engineering plants are based for amine plants, including NOxFlash and PUR-D.

The NOxFlash technology is the result of innovative research and has been proven in our installations since 2006. The NOxFlash technology:

  • Replaces the traditional use of scrubbing with PPM (potassium permanganate) solution, reducing cost and environmental impact.
  • Acts as proven abatement of benzene (aromatic hydrocarbons) in the final product.


The PUR-D technology is the final purification step, consisting of a distillation column, which enables separation/blow-off of non-condensable gasses, reducing the O2 content in the final product to max 5 ppm (v/v) and obtaining CO2 purity of min. 99.99% (v/v).

Simple and trouble-free operation

The electrical system for the EBU plant assures:

  • The latest PLC technology for operation and monitoring
  • Automatic start sequence and fully automatic operation
  • Reduced installation and commissioning time on site


The EBU plants are designed for high efficiency and reliability through components selected for 24/7 operation.