Wärtsilä introduces CO2 liquefaction solution

Traditional biogas upgrading plants have been based on “catch and release” of the separated carbon dioxide (CO₂).

Instead of releasing this CO₂ into the atmosphere, Puregas BC utilises the best available technologies for purifying and liquefying this biogenic carbon dioxide (bioCO₂). The solution turns biogas, an already circular, zero-carbon footprint fuel, into a carbon-negative solution.

With Wärtsilä Gas Solutions’ Puregas CA biogas upgrading system, the Puregas BC solution eliminates the already minimal (less than 0.1 percent) methane emissions, as any methane slip can be routed back to the upgrader.

In addition to the environmental benefits, the solution offers a new commercially profitable revenue stream for the plant owner, as the captured and liquefied biogenic carbon dioxide (bioLCO₂) is purified to food and beverage grade, and/or storage grade.

Upcoming regulations for electro-fuels (eFuels) production will require bioCO₂ as feedstock, making the Puregas BC solution an ideal fit.

The world is facing a climate crisis that calls for not only neutralising but also taking a step further and reversing the impact of carbon emissions. The Puregas BC is a product that can deliver this and move from a carbon-neutral to a carbon-negative impact. The solution is designed to support our customers in reaching their decarbonisation commitments. On top of this, the product also offers a commercial benefit, said Magnus Folkelid, Sales Manager, Wärtsilä Gas Solutions, Biogas.

The solution comes in a containerised plant with no additional buildings needed. It is designed for full integration with Wärtsilä Gas Solutions Puregas CA systems. It is also suitable for retrofitting and/or integrating with other biogas upgrading processes.