Research on mitigating contamination of condensate polishing resin from octadecylamine lay-up protection of supercritical units

Abstract Octadecylamine (ODA) is an effective corrosion inhibitor during the lay-up periods of thermal power units. However, its application in supercritical and ultra-supercritical units has been limited due to the potential for contaminating the resin in condensate polishing treatment systems. This paper presents a retention control method based on the adsorption behavior of ODA on ion-exchange resins, effectively capturing residual ODA and thus reducing the risk of resin contamination. Experimental results show that this method can decrease residual ODA by over 95%, offering a practical solution for safely implementing ODA lay-up protection in supercritical units.