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51313-02347-Membrane-Coated Electrochem. Probe for Corr. Measurements of High Strength CS in Supercritical CO2

Product Number: 51313-02347-SG
ISBN: 02347 2013 CP
Author: Serguei Lvov
Publication Date: 2013
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$20.00
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Justin Beck Mark Fedkin and Serguei Lvov*
The EMS Energy Institute
Department of Energy and Mineral Engineering
Department of Materials Science and Engineering
The Pennsylvania State University University Park PA 16802 USA

Margaret Ziomek-Moroz Gordon Holcomb Joseph Tylczak and David Alman
U.S. Department of Energy
National Energy Technology Laboratory
1450 Queen Avenue SW Albany OR 97321 USA

*Corresponding author: lvov@psu.edu


Growing interest in transporting supercritical carbon dioxide (scCO2) for enhanced oil recovery and carbon capture and storage has also led to an increased interest in the corrosion behavior of pipeline steels in scCO2 fluids with varying levels of water contamination. Electrochemical measurements in scCO2 fluids have been limited by the very low solution conductivity even in fluids saturated with water vapor. The work described here details recent efforts to overcome this barrier by using electrochemical probes coated with a thin membrane of ion conducting polymer. Real-time in situ electrochemical measurements were performed in scCO2 with various levels of water contamination. Corrosion rates for X65 carbon steel determined by linear polarization resistance electrochemical impedance spectroscopy and electrochemical frequency modulation are presented. An analysis of the charge transfer and mass transfer kinetics over time provided by the impedance data is also presented. Surface analyses were performed on samples exposed to scCO2 with and without the membrane coating to determine the effect of the membrane on the corrosion process.

Keywords: CO2 sequestration corrosion of carbon steel supercritical CO2 fluids electrochemical techniques electrochemical corrosion probe ion conducting membrane
 

Justin Beck Mark Fedkin and Serguei Lvov*
The EMS Energy Institute
Department of Energy and Mineral Engineering
Department of Materials Science and Engineering
The Pennsylvania State University University Park PA 16802 USA

Margaret Ziomek-Moroz Gordon Holcomb Joseph Tylczak and David Alman
U.S. Department of Energy
National Energy Technology Laboratory
1450 Queen Avenue SW Albany OR 97321 USA

*Corresponding author: lvov@psu.edu


Growing interest in transporting supercritical carbon dioxide (scCO2) for enhanced oil recovery and carbon capture and storage has also led to an increased interest in the corrosion behavior of pipeline steels in scCO2 fluids with varying levels of water contamination. Electrochemical measurements in scCO2 fluids have been limited by the very low solution conductivity even in fluids saturated with water vapor. The work described here details recent efforts to overcome this barrier by using electrochemical probes coated with a thin membrane of ion conducting polymer. Real-time in situ electrochemical measurements were performed in scCO2 with various levels of water contamination. Corrosion rates for X65 carbon steel determined by linear polarization resistance electrochemical impedance spectroscopy and electrochemical frequency modulation are presented. An analysis of the charge transfer and mass transfer kinetics over time provided by the impedance data is also presented. Surface analyses were performed on samples exposed to scCO2 with and without the membrane coating to determine the effect of the membrane on the corrosion process.

Keywords: CO2 sequestration corrosion of carbon steel supercritical CO2 fluids electrochemical techniques electrochemical corrosion probe ion conducting membrane
 

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