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Abstract

Why is limiting chloride and sulfate important in power plant steamcycle chemistry? The control of these impurities can help mitigate corrosion of system components. Chloride and sulfate originate from feedwater, make-up water, and, at more trace levels, from ion-exchange (IX) resin and membranes themselves. The use of X-ray fluorescence (XRF) spectroscopy has been identified as a viable analytical tool to determine total elemental chlorine in strongly basic anion resins. An investigation into the viability of using XRF technology to determine elemental sulfur is in progress. The accuracy and level of detection using XRF analytical technology far exceeds the capabilities of traditional analysis for ionic and organic-based chloride (and potentially sulfate) on anion resins. XRF is also being used to identify contaminants on silt density index (SDI) pads and reverse osmosis (RO) membranes.

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