About us


Puregas Solutions is a Swedish based company with headquarters in Kalmar. In October 2017, Puregas Solutions was acquired by Wärtsilä Corporation to be a catalyst towards a digital and performance driven business. Puregas Solutions specialise in delivering efficient and reliable biogas upgrading solutions. A global market leader, Puregas Solutions has subsidiary companies in Germany, Denmark, United Kingdom and the United States of America.

With more than 20 years history and experience Puregas Solutions designs and delivers biogas upgrading solutions using the unique CApure process. Raw Biogas is upgraded to biomethane / Renewable Natural Gas RNG for direct grid injection, compression for vehicle fuelling (bioCNG) or liquefied to provide bioLNG. In all cases a very low carbon alternative fuel.

The CApure process recovers over 99.9% of the biomethane present in the raw biogas by separating the CO2 from the biogas through a process of chemical absorption. The selective organic solvents used in this process are so efficient that the product gas can contain over 99% biomethane. The biomethane or Renewable Natural Gas can be directly injected in to the gas grid, compressed to produce bio-CNG or liquefied for bio-LNG. It’s also possible to capture the CO2 from the plant and use this for commercial purposes. All plants are fully factory tested and third party inspected prior to shipment.

Linda Kraft, Project Manager for Puregas Solutions explains:

“Because the upgrading plant undergoes a comprehensive Factory Acceptance Test, any remedial actions necessary can be performed in the workshop prior to shipping. This means that we only need to focus on the mechanical and electrical installation on site, safe in the knowledge that the process is stable and the plant is ready to go”.

Wärtsilä is a global leader in smart technologies and complete lifecycle solutions for the marine and energy markets. By emphasising sustainable innovation, total efficiency and data analytics, Wärtsilä maximises the environmental and economic performance of the vessels and power plants of its customers.


13 million compressed
natural gas vehicles worldwide

99.99% CH2

Recovered by Puregas Solutions
unique upgrading process


Over 30 plants already
operational across Europe

Our Global Network

Puregas Solutions AB

Torsåsgatan 3A
392 39 Kalmar
Tel: +46 (0) 480 77 00 00

Puregas Solutions Ltd

Enterprise Park East
Sunderland SR5 2TA
Tel: +44 (0) 191 516 6662

Puregas Solutions GmbH

Deichstrasse 1
20 459 Hamburg
Tel: +49 (0) 160 906 629 51

Puregas Solutions AS

Birkemose Allé 39
6000 Kolding
Tel: +46 (0) 7016 44 312

Wärtsilä North America Inc

117101 N. Gessner Rd,
Suite A, Houston,
TX 77064,

Tel: +1 281 233 6200

Wärtsilä Gas Solutions

Solbraavn 10
1383 Asker
Tel. +47 81 54 85 00