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The AAPG/Datapages Combined Publications Database

Australian Energy Producers Journal

Abstract


Australian Energy Producers Journal
Vol. 65 (2025), No. Supplement 1 (May), Pages 1-4
https://doi.org/10.1071/EP24254

Determination of maximum allowable Previous HitwaterNext Hit content for CO2 pipelines

Kenneth Wong

A Worley, Level 14/240 St Georges Terrace, WA, 6000, Australia.

ABSTRACT

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 Previous HitwaterNext Hit (H2O) content. The presence of CO2 can lead to corrosion in carbon steel pipelines. Under-saturated Previous HitwaterNext Hit 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 Previous HitwaterNext Hit conditions is developed to aid in determining the maximum allowable Previous HitwaterNext Hit content. Fluid components such as triethylene glycol (TEG), even in trace amounts, should not be overlooked as it can decrease the Previous HitwaterNext Hit solubility of CO2 and increase corrosivity in the material. A fine balance should be made when setting the Previous HitwaterTop content specification at pipeline entry as this can influence the choice of the dehydration technology and indirectly affect project economics.

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