Session: Material Selection and Qualification in CCS Downhole Environment (Part II of II)
The role of corrosion resistance in the technical feasibility of co₂ injection wells from BECCS (C2026-00239)
Thursday, March 19, 2026
4:30 PM - 5:00 PM Central
Location: 342 DE
Earn .5 PDH
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Bioenergy with Carbon Capture and Storage can significantly contribute to achieving net-zero emissions. In Brazil, BECCs is particularly promising due to the abundance of biomass, such as sugarcane residues, with potential for negative emissions in industries like ethanol. Within this context, corrosion resistance emerges as a critical requirement for the technical feasibility of carbon dioxide (CO₂) injection wells, particularly in potential aggressive environments such as CO₂ with impurities (H2O, H2S, O2, ethanol). The present study addresses the corrosion resistance of carbon steel, S13Cr and 25Cr on typical conditions of CO₂ injection from bioenergy industries. A conservative methodology was adopted to investigate the well casing corrosion performance. U-bend specimens with crevice device were exposed for 3 months to 8 MPa of CO2 with several levels of impurities and temperatures. On conditions with 500 ppm of H2O dissolved on CO2 both S13Cr and 25Cr had good corrosion performance. Even on environments of CO2 saturated with water no relevant localized corrosion was observed to both CRA whereas carbon steel was considerable attacked on this later scenario. This study will provide technical data to materials selection, long-term integrity and operational safety of CO₂ injection wells throughout their service life.
