Session: Corrosion in Carbon Capture, Transportation, and Utilization and Storage (CCTUS) (Part II of III)
The Effect of Methanol in Acid Producing CO2 Specification (C2026-00238)
Wednesday, March 18, 2026
2:30 PM - 3:00 PM Central
Location: 342 DE
Earn .5 PDH
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Specifications for CO₂ transport are currently being developed to prevent acid dropout or the formation of precipitates. Some chemical reactions between impurities will be permitted, any resulting products must remain dissolved within the CO₂ stream and stay below their solubility limits to meet specification requirements. The impurities composition which will lead to the formation of acid is more or less known by extensive testing with H2O, O2, SO2, H2S, and NO2. The addition of other impurities could influence the reactions but in which way it is currently not known. This study investigates the corrosion behavior of carbon steel when exposed to dissolved acidic species formed from reactions between injected impurities and the effect methanol could have on these reactions. A transparent autoclave equipped with individual injection lines for each impurity was used to simulate the transport environment. Carbon steel samples from welded pipes, produced by a Southern European manufacturer, sourced from both base and welded sections, were suspended in the bulk CO2 to ensure exposure only to dissolved species. The reacted impurities were measured to identify possible reactions and observe if there was a difference in the present of methanol.
