Session 24. Oral Presentation for: Determination of maximum allowable water content for CO2 pipelines

Presented on 29 May 2025: Session 24 The design consideration for carbon dioxide (CO2) transportation via pipeline from different emitters necessitates the need to develop a CO2 fluid specification at pipeline entry with defined impurity bands, particularly concerning the water (H2O) content. The presence of CO2 can lead to corrosion in carbon steel pipelines. Under-saturated water can also cause pitting corrosion when CO2 interacts with acid-forming impurities. A logic chart that considers CO2 rich mixture fluid components, operating scenarios and water conditions is developed to aid in determining the maximum allowable water content. Fluid components such as triethylene glycol (TEG), even in trace amounts, should not be overlooked as it can decrease the water solubility of CO2 and increase corrosivity in the material. A fine balance should be made when setting the water content specification at pipeline entry as this can influence the choice of the dehydration technology and indirectly affect project economics. To access the Oral Presentation click the link below. To read the full paper click here