Background
Transportation and injection of captured CO₂ is an essential part in any CCUS strategy. However, corrosion in pipelines can have a huge economic impact on the pipeline infrastructure for CO₂ injection if care is not taken. In the worst case, corrosion can reduce the wall thickness to such a degree that the pipeline will crack in the corroded area causing uncontrolled leaks or damage to the entire pipeline system.

The transportation pipelines and injection wells will play a key role as the connection between carbon capture utilization and storage why it is essential to assess the impact of CO₂ on current oil and gas infrastructure or installation of new ones for CO₂ applications, detailed knowledge of the interaction between CO₂ (liquid or supercritical), impurities (e.g., water, H₂S, NO_x), process conditions, reservoir fluids, and the pipeline material is required and currently insufficient.

Objectives
The project will investigate the corrosion effect of liquid or supercritical CO₂ in the presence of impurities and provide a mathematical model to predict this corrosion on existing and new infrastructure. Moreover, the best available technology to measure impurities in a CO₂ liquid environment will be investigated.

The project will provide fundamental and necessary information to frame future quality guidance and legislation for CO₂ injection, which is currently lacking. In addition, a gap analysis will frame the material integrity and legislation for qualifying existing offshore facilities for CO₂ injection.

Expected results

1. Examine possible CO₂ impurity monitoring systems, both sample-based (off-line or at-line) and in-line measurements.
2. Establish a relationship between the CO₂ impurities and material corrosion in the pipelines/wells and associated equipment.