Session: Material Selection and Qualification in CCS Downhole Environment (Part I of II)
Assessing the Role of Impurity Injection Protocols in CO₂ Storage Material Qualification (C2026-00098)
Thursday, March 19, 2026
11:30 AM - 12:00 PM Central
Location: 342 DE
Earn .5 PDH
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In most Carbon Capture and Storage (CCS) projects, CO₂ is sourced from multiple emitters, resulting in mixed streams with variable impurity profiles. The absence of standardized guidelines for acceptable impurity levels presents a key challenge. Therefore, each CCS project must set CO₂ specifications, setting upper limits for critical impurities to ensure the safe and effective operation of CCS infrastructures. Addressing these issues is essential for developing reliable CCS systems and minimizing risks associated with variable CO₂ compositions. For CO₂ injection and storage, materials must exhibit both corrosion resistance and mechanical proprieties to guarantee secure subsurface containment of CO₂ over long periods. However, the lack of harmonized material qualification protocols presents a significant barrier to reliable material selection. When qualifying material under a CO₂ stream containing impurities using batch systems, precise control of impurity levels is essential. This study investigates the influence of two autoclave loading protocols on the corrosion behavior of Super Duplex UNS S32760 in a CO₂-rich environment containing impurities. By carefully controlling impurity concentrations to replicate field-relevant conditions, the work highlights how test setup can impact corrosion outcomes. The findings contribute to improving the reliability of laboratory simulations and developing more robust material qualification strategies for CCS applications.
