Emissions from integrated iron and steel industry i Sweden - Model for estimation and allocation of energy consumption and CO2 emissions for reporting to the UNFCCC

SSAB’s two integrated iron and steel production plants in Luleå and Oxelösund are among the largest point sources of greenhouse gases in Sweden. Their reported emissions included in Sweden’s annual submission to the UNFCCC have been reviewed and revised in several previous studies. In a 2010 SMED pilot study it was concluded that there was a need to further review the energy allocation model for the Luleå and Oxelösund plants as well as the reported energy consumption and CO2 emissions from excess energy gases utilized outside the SSAB premises for power and heat production. In the light of the pilot study, this study aimed at developing a robust and sustainable model for present reported time-series for future estimations.

In cooperation with SSAB representatives, information on annual material input, calorific values and energy flows were assessed and used as basis for estimation of total energy consumption and model for energy allocation. In addition, energy statistics from Statistics Sweden and EU ETS data were evaluated. The results show that the present estimations of energy consumption in the IPCC energy sector based on data from the plant-specific annual environmental reports and energy statistics from Statistics Sweden are sufficient also for future reporting to the UNFCCC. Furthermore, this report includes recommendations on revisions and future reporting of CO2 emissions from combustion of SSAB excess energy gases (reported in CRF 1A1a) as well as of energy allocated to non-energy use of fuels in industrial processes (CRF 2C1) and feedstocks (CRF 1Ad).