17.09.2021
CO₂ footprint tool for CCS
The calculated CO2 footprint has not previously been found for the Norwegian CCS value chain. Gassnova therefore established a tool that could perform calculations of the CO2 footprint in line with current ISO standards.
Do not emit more CO2 than is stored
The purpose of CCS is to reduce CO2 emissions by capturing and permanently storing CO2 in underground or subsea reservoirs. Since CCS requires extensive investments, it is important that far more CO2 is stored than what is emitted as a result of the construction, operation and decommissioning of the CCS chain.
About Gassnova’s carbon footprint calculator
The tool is based on an Excel spreadsheet model and the greenhouse gas emission factors are taken from open and recognized databases. Gassnova has used this tool to calculate the carbon footprint of the Longship project. The following alternative value chains are calculated:
Annual catch of 400,000 tonnes of CO2 at Heidelberg Materials in Brevik, transport by boat 585 km to Northern Lights’ reception facility in Øygarden in Western Norway, pipe transport 100 km offshore to a warehouse 2500 meters below the seabed.
Annual catch of 400,000 tonnes of CO2 at Klemetsrud in Oslo, transport by boat 700 km to Northern Lights’ reception facility in Øygarden, pipe transport 100 km offshore to a warehouse 2500 meters below the seabed.
Annual catch of 800,000 tonnes of CO2 in Brevik and Klemetsrud in total, transport by boat the same distances as above, pipe transport 100 km offshore to a warehouse 2500 meters below the seabed.
The project partners Fortum Oslo Varme, Heidelberg Materials and Northern Lights have contributed consumption figures for their parts of the value chain.
Contact us if you need similar calculations of CO2 footprint
In collaboration with DNVGL and Carbon Limits AS, Gassnova has developed a tool for calculating the amount of CO2 emitted when facilities for capture, transport and storage of CO2 are to be built, operated and decommissioned. The tool is not commercially available, but a version without consumption figures and emission factors can be obtained by contacting Gassnova.
Read more about carbon footprints here.
Here you can also read about the CO2 footprint from Longship, and CO2 footprint calculations from 2020.