Hitachi, ASCO to develop CO2 liquefaction plant

A new liquefaction plant is to be installed by energy partners Hitachi Zosen Inova (Hitachi) and ASCO Carbon Dioxide Ltd (ASCO) to separate and liquefy renewable carbon dioxide (CO2) at a Swiss biogas plant.

To prevent CO2 from being released into the atmosphere, the ‘state-of-the-art’ facility will capture the CO2 that is removed during biogas to biomethane upgrading before the gas is filtered and dehydrated under high pressure.

With a processing capacity of 4,000 tonnes per year, the plant will produce biogenic CO2 to be used for a range of applications including in various industrial processes, medical technology, for carbonating beverages, and preserving food.

The project is also being developed by CO2 Energie AG, a subsidiary of Swiss energy company ‘Regionalwerke Baden’ (RWG), and ‘Recycling Energie AG’, which last year collaborated on a similar project in Nesselnbach.

“With the new plant [at Nesselnbach], we will be able to capture around 90% of the CO2 produced, which amounts to up to 3,000 tonnes of CO2 annually,” said a spokesperson.

Liquid CO2 is stored in large tanks before being collected by Messer Schweiz AG, an industrial gases company in Lenzburg, and sold on the national CO2 market.

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