Electrochemical Oxygen Removal from Seawater in Industrial Scale Using Silver Cathode

Utsav R. Dotel; Kai Vuorilehto; Magne O. Sydnes; Hans Urkedal; Tor Hemmingsen

doi:10.1021/acs.iecr.7b02004

Electrochemical Oxygen Removal from Seawater in Industrial Scale Using Silver Cathode

Utsav R. Dotel, Kai Vuorilehto, Magne O. Sydnes, Hans Urkedal, Tor Hemmingsen^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

2 Citations (Scopus)

Abstract

In this study, electrochemical removal of oxygen from seawater in industrial scale is demonstrated. A test rig with an industrial scale electrochemical cell has been constructed and tested with filtrated oxygen rich seawater. The electrochemical cell was comprised of a silver mesh cathode and an iridium oxide anode with a cation exchange membrane. The effects of flow rate, pressure, and applied voltage on oxygen removal efficiency and resulting current were studied. Also, the differential pressure between the anode and cathode chambers affected the performance of the cell, and an overpressure of 0.20-0.30 bar in the anode chamber was optimal in order to obtain maximum oxygen removal. It was possible to achieve an oxygen concentration lower than 5 ppb in seawater at a flow rate of 5 L min^-1. No scaling or biofilm problems were observed during a 200 h test period.

Original language	English
Pages (from-to)	8954-8960
Number of pages	7
Journal	Industrial and Engineering Chemistry Research
Volume	56
Issue number	31
DOIs	https://doi.org/10.1021/acs.iecr.7b02004
Publication status	Published - 9 Aug 2017
MoE publication type	A1 Journal article-refereed

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10.1021/acs.iecr.7b02004

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title = "Electrochemical Oxygen Removal from Seawater in Industrial Scale Using Silver Cathode",

abstract = "In this study, electrochemical removal of oxygen from seawater in industrial scale is demonstrated. A test rig with an industrial scale electrochemical cell has been constructed and tested with filtrated oxygen rich seawater. The electrochemical cell was comprised of a silver mesh cathode and an iridium oxide anode with a cation exchange membrane. The effects of flow rate, pressure, and applied voltage on oxygen removal efficiency and resulting current were studied. Also, the differential pressure between the anode and cathode chambers affected the performance of the cell, and an overpressure of 0.20-0.30 bar in the anode chamber was optimal in order to obtain maximum oxygen removal. It was possible to achieve an oxygen concentration lower than 5 ppb in seawater at a flow rate of 5 L min-1. No scaling or biofilm problems were observed during a 200 h test period.",

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AU - Dotel, Utsav R.

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AU - Sydnes, Magne O.

AU - Urkedal, Hans

AU - Hemmingsen, Tor

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AB - In this study, electrochemical removal of oxygen from seawater in industrial scale is demonstrated. A test rig with an industrial scale electrochemical cell has been constructed and tested with filtrated oxygen rich seawater. The electrochemical cell was comprised of a silver mesh cathode and an iridium oxide anode with a cation exchange membrane. The effects of flow rate, pressure, and applied voltage on oxygen removal efficiency and resulting current were studied. Also, the differential pressure between the anode and cathode chambers affected the performance of the cell, and an overpressure of 0.20-0.30 bar in the anode chamber was optimal in order to obtain maximum oxygen removal. It was possible to achieve an oxygen concentration lower than 5 ppb in seawater at a flow rate of 5 L min-1. No scaling or biofilm problems were observed during a 200 h test period.

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