CO2 Selfgenerating Plants

CO2 generating plants (CBU) are based on combustion of various fossil fuels such as diesel oil, heavy fuel oil, kerosene, natural gas, LPG or LNG.

Through combustion, scrubbing, absorption, stripping, adsorption and separation technology, the CO2 generating plants meet the strictest CO2 quality requirements regardless of the fuel type.

All Union generating plants are based on the latest technologies including NOxFlash and PUR-D.

Generating plants are based on absorption of CO2 from flue gas into an aqueous monoethanolamine (MEA) solution, which is subsequent heated by the combustion process to release the raw CO2 gas. To achieve the best combination of performance and long life of the equipment, a 9% MEA /water solution is used. Under this condition, the optimal ba-lance between CO2 load in the solution and avoidance of the corrosive effects are met.

The NOxFlash technology is the result of an innovative approach to process design and has been proven in our installations since 2006. Among other advantages, the NOxFlash technology replaces the traditional use of scrubbing with potassium permanganate (KMnO4) solution, thereby reducing cost and environmental impact. Furthermore, the NOxFlash system acts as proven abatement for benzene (aromatic hydrocarbon) 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, thereby reducing O2 content in the final product to max. 5 ppm (v/v) and obtaining corresponding CO2 purity of higher than 99.99% (v/v).

The electrical system for the CO2 generating plant consists of a combined MCC and control panel. From the control panel, which comprises the latest PLC technology, the plant is operated and monitored on a touch colour TFT display, ensuring easy and continuous trouble-free operation.

The plant is started by an automatic start sequence and the operation is fully automatic. The entire process is easily surveyed on the operator panel, showing the status of all drives, readings of all transmitters and alarm warnings, which will also be indicated by audible alarm.

All instruments installed on the skids are wired to junction boxes or remote I/O boxes and tested in our workshop prior to shipment, thus reducing installation and commissioning time on site.
The plants are designed for high efficiency, availability and reliability through components selected for long life and 24/7 operation.