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MHI in coal-fired technology milestone

Mitsubishi Heavy Industries, Ltd (MHI) has received an order for the world’s largest post-combustion CO2 capture system for an enhanced oil recovery (EOR) project in Texas, US.

The project is primarily promoted by NRG Energy, an independent power producer (IPP), and JX Nippon Oil & Gas Exploration Corporation (JX Nippon), a JX Group company headquartered in Japan.

The system will capture CO2 from flue gas from an existing coal-fired power generation plant and will have a CO2 capture capacity of 4776 metric tons per day (mtpd). The system is slated for completion in the fourth quarter of 2016.

MHI received the CO2 capture system order from Petra Nova CCS I LLC, a special purpose company (SPC) of NRG and one of the companies implementing the project, through Mitsubishi Heavy Industries America.

The EOR project involves the separation and capture of CO2 from flue gas emitted from Unit 8 of NRG’s WA Parish generation station, a coal-fired plant located approximately 60 km southwest of Houston, Texas, and injection of the CO2 into the nearby West Ranch oil field to boost crude oil production.

The CO2 capture system will consist of a flue gas quencher, absorber and regeneration system, CO2 compression unit, and utility facilities. It will have a CO2 capture efficiency of 90 per cent. MHI will license CO2 capture technology to Petra Nova CCS I through MHIA. The MHIA/TIC consortium will undertake engineering, procurement and construction (EPC) of the CO2 capture system and its ancillary facilities.

MHI’s CO2 capture technology is the KM CDR Process, which uses a proprietary KS-1 high-performance solvent for CO2 absorption and desorption that was jointly developed by MHI and Kansai Electric Power Co. Compared with other CO2 capture technologies, the KM CDR Process uses significantly less energy, the companies claim.

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