Situated on the west coast of Norway, the Mongstad Energy Project at Statoil's Mongstad refinery demonstrates advanced natural gas Combined Heat and Power (CHP) production integrated with ground-breaking Carbon Capture and Storage (CCS) projects.
Highly efficient CHP solution
Designed and constructed by DONG Energy's power engineers – now a part of Ramboll Energy's Power Division – the Mongstad CHP plant started commercial operation in 2010 following turn-key delivery of engineering, procurement and construction management (EPCM) for the project. Based on a combined cycle, the plant burns natural gas received through pipelines from the Troll field in the North Sea and fuel gas supplied by the Mongstad refinery. Boasting an energy-efficiency rate of up to 70 percent, the plant has a total electrical output capacity of approx. 280 MW and a heat output capacity of approx. 350 MJ/s. The immense capacity allows the plant to create energy-efficient process heat for the refinery and electricity for neighbouring Kollsnes gas processing facility and the Troll field, while still also feeding excess electricity into the public utility network in a manner that is at the same time very efficient and offers great synergies.
Equipped with two gas turbines lines, each with a 130 MW capacity, supplemented by heat recovery boiler units and a common steam turbine of 20 MWel , the plant uses residue waste gas from the refinery to manufacture process steam or crude oil heating.
The world's largest carbon capture project to date
Power plant exhaust gas from the use of fossil fuels can be cleaned with CCS technology; by capturing up to 90 percent of CO2 emissions from the gases, it is possible to prevent the vast emission of CO2 into the atmosphere.
The Mongstad plant has been selected to become a world leading full-scale demonstration project. As a condition of establishing the Mongstad CHP plant, Statoil and the Norwegian State agreed in 2006 on developing CCS technology at Mongstad in two phases: The first phase includes establishing a CO2 Capture Technology Centre Mongstad (TCM) as a pilot project for the use of Enhanced Oil Recovery and as a front-runner for a full-scale Carbon Capture and Storage plant in the ensuing second phase.
Positioned for world-class by being the largest planned pilot project of its kind ever, the TCM will use CCS technology for handling up to 100,000 tons of CO2 a year. By testing CO2 capture on two types of flue gases using two different capture technologies, the results will be relevant not only to CHP plants, but also to carbon capture and storage in coal-fired plants.
Ramboll has acted as overall EPCM on the plant establishment.
Through an on-going partnership with Norwegian company Gassnova SF, Ramboll has during the first phase of the pilot project provided a plant integration analysis and pre-study design engineering on the Test Center integration and full-scale CCS project.
The full-scale CCS project planned for phase two is to include CO2 capture and transport by pipeline for storage under the North Sea seabed.
Ramboll's part in the project
The Mongstad energy project has engaged a broad spectrum of Ramboll's specialist skills in constructing and designing the Mongstad CHP plant as well as in the TCM pilot project.
Ramboll's services have included:
- Feasibility study and early-phase analysis
- Project development
- Basic process and layout design
- FEED study
- Negotiation and contracting
- EPCM involving a high degree of engineering