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Title: The Use of Glow Discharge Optical Emission Spectroscopy to Quantify Internal Carburization in Supercritical CO2

Abstract

To analyze the compatibility of structural alloys in supercritical CO2 (sCO2), techniques are needed to quantify any potential alloy degradation. A specific concern for sCO2 environments is the ingress of C into the alloy, which has been observed for more than 50 years in both Fe- and Ni-based alloys. Recently, Glow Discharge Optical Emission Spectroscopy (GDOES) has been increasingly used to measure the concentration of light elements, like C, as a function of depth. As part of a current effort to model the lifetime of structural alloys in sCO2 at 700-800 °C, several Fe- and Ni-base alloy specimens were analyzed after 1,000-5,000 h exposure in 1 and 300 bar CO2. In general, the specimens exposed at 750°C showed little or no C ingress. This may be due to the dense external Cr2O3 scale formed on these alloys, which inhibited C transport. At lower temperatures, 550-700 °C, C ingress was detected in both Fe- and Ni-base alloys.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1435243
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: The 6th International Supercritical CO2 Power Cycles Symposium - Pittsburgh, Pennsylvania, United States of America - 3/27/2018 4:00:00 AM-3/29/2018 4:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Lance, Michael J., Leonard, Donovan N., and Pint, Bruce A. The Use of Glow Discharge Optical Emission Spectroscopy to Quantify Internal Carburization in Supercritical CO2. United States: N. p., 2018. Web.
Lance, Michael J., Leonard, Donovan N., & Pint, Bruce A. The Use of Glow Discharge Optical Emission Spectroscopy to Quantify Internal Carburization in Supercritical CO2. United States.
Lance, Michael J., Leonard, Donovan N., and Pint, Bruce A. Sun . "The Use of Glow Discharge Optical Emission Spectroscopy to Quantify Internal Carburization in Supercritical CO2". United States. https://www.osti.gov/servlets/purl/1435243.
@article{osti_1435243,
title = {The Use of Glow Discharge Optical Emission Spectroscopy to Quantify Internal Carburization in Supercritical CO2},
author = {Lance, Michael J. and Leonard, Donovan N. and Pint, Bruce A.},
abstractNote = {To analyze the compatibility of structural alloys in supercritical CO2 (sCO2), techniques are needed to quantify any potential alloy degradation. A specific concern for sCO2 environments is the ingress of C into the alloy, which has been observed for more than 50 years in both Fe- and Ni-based alloys. Recently, Glow Discharge Optical Emission Spectroscopy (GDOES) has been increasingly used to measure the concentration of light elements, like C, as a function of depth. As part of a current effort to model the lifetime of structural alloys in sCO2 at 700-800 °C, several Fe- and Ni-base alloy specimens were analyzed after 1,000-5,000 h exposure in 1 and 300 bar CO2. In general, the specimens exposed at 750°C showed little or no C ingress. This may be due to the dense external Cr2O3 scale formed on these alloys, which inhibited C transport. At lower temperatures, 550-700 °C, C ingress was detected in both Fe- and Ni-base alloys.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {4}
}

Conference:
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