SkyZero: Leading carbon capture in Sweden's waste to energy sector

By introducing carbon capture and storage through the SkyZero initiative, Sysav aims to reduce carbon emissions by approximately 95% from its waste-to-energy plant boiler lines 3 and 4. Capturing and storing Sysav’s carbon emissions represents an important step towards achieving negative emissions in Sweden.

Ramboll contributed to Sysav’s vision by conducting a detailed feasibility study and subsequent outline design for a full-scale carbon capture solution for the plant with a capacity of approximately 500,000 tonnes CO2 per year. The Swedish Energy Agency’s climate initiative “Industriklivet” partly funded the feasibility study and outline design.

The feasibility study aimed to identify the most advantageous technology choices for carbon capture, processing, and energy integration, while also exploring important design adjustments to develop a unified value chain at the waste-to-energy plant. In addition, Ramboll also investigated the total economic aspects of establishing and commissioning CO2 capture, transport, and final storage and an assessment of the regulatory conditions with the purpose of assessing whether Sweden’s legislation supports the use of carbon capture in Sweden.

The outline design further matured the project focusing on high-priority design choices such as turbine design, process water optimization and electrical and process integration into the existing waste-to-energy plant. In addition, Ramboll assisted Sysav in developing a procurement strategy aimed at preparing the project for public tendering.

Ramboll is at present developing tender documents on behalf of Sysav for the procurement of the carbon capture plant including CO2 pipeline and CO2 liquefaction plant. The project aims at being operational by 2030.