Impact of Filming Amine on Ion Exchange Resin for Ultrapure Water Application

Abstract

Two types of proprietary filming amines were tested in laboratory experimentation to evaluate potential impacts on condensate polisher ion exchange resins (Dowex 650C and 550A). The properties of filming amines to coat surfaces within the steam cycle of a power plant may also block ionic mass transport or have chemical interactions with ion exchange resin. Experimentation was done with resins before and after exposure to filming amines and mass transfer coefficient (MTC) was compared to measure the impact. Comparative studies were also performed with octadecylamine (ODA). Results indicate a significant impact of Filming Amine-1 (FA-1) on cationic resin with reductions in MTC. MTC for cationic resin was partially recoverable. For anionic resins, MTC could be recovered with maximum strength regenerant. Effect of Filming Amine-1 (FA-2) was slightly higher than FA-1 in cation resin. But after regenerating, FA-2 exposed resin improved MTC higher than FA-1 exposed resin.