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CLIMIT-Forskning, utvikling og demo av CO2-håndtering

Impact of CO2 impurities and additives in CCS

Alternative title: Virkning av CO2 urenheter og tilsatser i CCS

Awarded: NOK 10.3 mill.

High costs and risks remain significant barriers to large-scale implementation of carbon capture, transport and storage (CCS). Cost and risks can be reduced by better describing e.g. storage and injection dynamics in reservoir and process simulation tools, which will require accurate knowledge of thermophysical properties of impure CO2. Uncertainties in these properties can therefore lead to costly overdesign and/or risk of inefficient injection and storage or unforeseen and undesirable incidents. Hence, accurate predictions of these properties are a necessity to realize large-scale CCS. Currently, there are large gaps in property data and correspondingly large uncertainties in models. In ImpreCCS, the crucial properties of viscosity, density, and thermal conductivity are measured, and improved property models are developed. The models will significantly improve the basis for understanding the behaviour of impure CO2 in storage and transport-storage interface processes. They have been employed in a reservoir modelling test case relevant for the Norwegian CCS full-scale project, which will increase understanding of both injection and reservoir dynamics. Improved models and understanding will contribute to reduced costs and risks throughout the CCS chain, and thus directly address all three focus areas of CLIMIT: Early full-scale CCS value chain in Europe, large-scale storage of CO2 on the NCS, and future solutions for CCS. In the period December 2020 to November 2021 the project focus has been measurements of viscosity and reservoir modelling. A PhD candidate at NTNU is financed by the project. Her focus is to provide new data on viscosity and density and to improve models for viscosity. She was on a 4 month long stay in Ruhr-Universität Bochum, measuring viscosity of relevant mixtures in the gas phase. Now she is working on measurements of viscosity and density in the liquid phase using a new purposely designed ECCSEL facility of SINTEF Energy Research. During the period it has been published a scientific article on measurements of thermal conductivity in CO2 mixtures. In addition, the project results have been presented at two webinars and in four scientific conference publications. Two of these also resulted in published conference proceedings articles. There have been two scientific meetings with partners in the project, with high attendance from the industry.

High costs and risks remain significant barriers to large-scale implementation of carbon capture, transport and storage (CCS). Cost and risks can be reduced by better describing e.g. storage and injection dynamics in reservoir and process simulation tools, which will require accurate predictions of thermophysical properties of impure CO2. Uncertainties in these properties can therefore lead to costly overdesign and/or risk of inefficient injection and storage or unforeseen and undesirable incidents. Hence, accurate predictions of these properties are a necessity to realize large-scale CCS. Currently, there are large gaps in property data and correspondingly large uncertainties in models. In ImpreCCS, the crucial properties of viscosity, density, and thermal conductivity will be measured, and improved property models will be developed. The models will significantly improve the basis for understanding the behaviour of impure CO2 in storage and transport-storage interface processes, and will be employed in a reservoir modelling test case of Smeaheia, which will increase understanding of both injection and reservoir dynamics. The new fluid property models will be provided with an interface usable by industry, e.g. for reservoir simulators. Improved models and understanding will contribute to reduced costs and risks throughout the CCS chain, and thus directly addresses all three focus areas of CLIMIT: Early full-scale CCS value chain in Europe, large-scale storage of CO2 on the NCS, and future solutions for CCS.

Publications from Cristin

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CLIMIT-Forskning, utvikling og demo av CO2-håndtering