Introduction
Electrolysis plants create hydrogen and chlorine from a brine solution. Chlorine gas generated from the anolyte of the electrolysis tank generally contains between 0.5 to 2.0 vol% H2O. The sample is then cooled and filtered to remove brine, subsequently coming out as wet chlorine gas. The wet gas is sent to a drying tower where it is treated with sulfuric acid to get moisture down to the ppm level. Acid mist remains in the dry chlorine gas and is sent to a dry chloride tower to remove the mist. The dry chlorine gas is then sent to a reciprocating compressor for liquefaction.
The presence of moisture after the dry chloride tower, even at trace levels, causes corrosion of the chlorine compressor and contaminates the product with chlorine hydrate and hydrous iron chloride. Trace moisture levels are conventionally monitored before and after the compressor using phosphorous pentoxide (P2O5) sensors. The P2O5 sensors have slow response times, high maintenance costs (both time and money), and eventually deteriorate due to process contact.
Process
Expected Benefits
- Quick identification of process upset and consequently corrective action
- Avoiding equipment damage and/or product contamination
- Highly sensitive measurements in the minimum range of 0-30ppm H2O
- In-situ online validation and calibration minimizes downtime
Field Data
Product Recommendations
TDLS200
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For additional information please contact Analytical Product Marketing
Related Industries
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Chemicals
Chemical products are indispensable to modern life and industry. Chemical plants, where these products are manufactured, are required to maintain stable operations 24 hours a day, 365 days a year while achieving high levels of safety, productivity, and sustainability. Leveraging more than 100 years of expertise in measurement and control, together with digital technologies such as AI, Yokogawa helps chemical industry customers achieve sustainable growth. Together with Yokogawa, shape the future of your manufacturing operations.
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