A demonstration plant in Japan will capture and liquefy carbon dioxide from boiler exhaust gas and supply it to the local CO2 market, according to Japanese newsletter the Gas Review.
The facility is a joint venture between Niterra and Hitachi Plant Services and will start up at Niterra’s Komaki plant in October next year. The plant will capture around three tonnes of CO2 per day before it is liquefied and delivered through existing supply chains to regional customers at a purity of 99.95%, making it suitable for food and beverage use.
The capture system increases the CO2 concentration in boiler exhaust from the typical 10% to more than 30% by enriching the combustion air with oxygen. Niterra is using a once-through boiler co-developed with Nippon Thermoener that operates with oxygen-enriched combustion.
This higher CO2 concentration enables a more efficient capture step using vacuum pressure swing adsorption. The VPSA unit uses zeolite to selectively adsorb CO2 and achieves a minimum of 90% CO2 purity and 90% recovery.
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