Metsä, Andritz Launch Carbon Capture Pilot Plant

Decarbonization Metsä, Andritz Launch Carbon Capture Pilot Plant

2025-09-08 Source: Press release Metsä Group 2 min Reading Time

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The Metsä Group in partnership with Andritz has started up a carbon capture pilot plant at Metsä’s Rauma mill to test the capture of pulp mill flue gases. The company is also exploring the idea of setting up a larger-scale demo plant for carbon capture at the site.

The pilot period will also provide information about the need for flue gas treatment and the quality of the end product. (Source: Metsä Group) — The pilot period will also provide information about the need for flue gas treatment and the quality of the end product.
(Source: Metsä Group)

Helsinki/Finland – In June, a carbon capture pilot plant came online at Metsä Group’s Rauma mill, where the company is testing the capture of pulp mill flue gases in cooperation with the technology company Andritz, the supplier of the pilot plant.

Carbon capture is an existing technology, but it has not previously been used for pulp mill flue gases. During the autumn of 2025, various operating models will be tested concerning aspects such as energy consumption and the amount of carbon captured. The pilot period will also provide information about the need for flue gas treatment and the quality of the end product.

“So far, the technology appears to be working well with the pulp mill’s flue gases,” says Kaija Pehu-Lehtonen, SVP Business Development and the Director of Metsä Group’s carbon capture project.

As part of the piloting, Metsä Group will also investigate possibilities for a larger-scale demo plant for carbon capture at the Rauma mill site. The annual capacity of a demo plant would be 30,000 to 100,000 tonnes of captured carbon dioxide. No decision has been made regarding the project or the demo plant’s location. Implementing the project would require all technical and financial issues to be resolved. The larger-scale demo plant would have a capacity more than one hundred times that of the pilot plant, which can capture approximately one tonne of carbon dioxide per day.

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Bio-based carbon dioxide is a virtually untapped pulp mill side stream. Carbon dioxide can be used as a raw material – for example, in the chemical and fuel industries – and it can serve as a replacement for fossil-based raw materials. Carbon capture does not increase wood use at the pulp mill, nor does it undermine production efficiency.

“Capture-related investments are large, and the market is underdeveloped, so we’re proceeding gradually. In addition, the value chains from raw material to finished products are often new and complex, requiring close cooperation between the participants and an insight into industrial operations,” says Pehu-Lehtonen.

Through its development activities, Metsä Group wants to promote the emergence of markets. However, market development also depends on regulation at the EU and national level, as well as on investment support for the green transition. State aid for the green transition will play a key role in accelerating industrial investment.

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