Initial assessment of Ni-base alloy performance in 0.1 MPa and supercritical CO2
Abstract
There is considerable interest in increasing the working temperature of both open and closed supercritical CO2 (sCO2) cycles to ≥700 °C. At these temperatures, it is unlikely that any Fe-base alloys have suitable strength and therefore the focus is on Ni-base alloys for this application. To begin addressing the lack of compatibility data under these conditions, initial work exposed a wide range of candidate alloys in 500-h exposures at 20 MPa (200 bar) CO2 at 650 -750 °C in high purity CO2. In general, the reaction products were thin and protective in these exposures. A smaller group of alloy coupons focusing on chromia- and alumina-forming alloys was exposed for 500h in 0.1 MPa (1bar) air, CO2, CO2+O2 and CO2+H2O for comparison. Thus, the thin surface oxides formed were very similar to those formed at high pressure and no clear detrimental effect of CO2 oxidation or O2 or H2O impurities could be observed in these exposures.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE)
- OSTI Identifier:
- 1225426
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- JOM. Journal of the Minerals, Metals & Materials Society
- Additional Journal Information:
- Journal Volume: 67; Journal Issue: 11; Journal ID: ISSN 1047-4838
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; supercritical CO2; Ni-base alloys; corrosion
Citation Formats
Pint, B. A., and Keiser, J. R. Initial assessment of Ni-base alloy performance in 0.1 MPa and supercritical CO2. United States: N. p., 2015.
Web. doi:10.1007/s11837-015-1661-8.
Pint, B. A., & Keiser, J. R. Initial assessment of Ni-base alloy performance in 0.1 MPa and supercritical CO2. United States. https://doi.org/10.1007/s11837-015-1661-8
Pint, B. A., and Keiser, J. R. Fri .
"Initial assessment of Ni-base alloy performance in 0.1 MPa and supercritical CO2". United States. https://doi.org/10.1007/s11837-015-1661-8. https://www.osti.gov/servlets/purl/1225426.
@article{osti_1225426,
title = {Initial assessment of Ni-base alloy performance in 0.1 MPa and supercritical CO2},
author = {Pint, B. A. and Keiser, J. R.},
abstractNote = {There is considerable interest in increasing the working temperature of both open and closed supercritical CO2 (sCO2) cycles to ≥700 °C. At these temperatures, it is unlikely that any Fe-base alloys have suitable strength and therefore the focus is on Ni-base alloys for this application. To begin addressing the lack of compatibility data under these conditions, initial work exposed a wide range of candidate alloys in 500-h exposures at 20 MPa (200 bar) CO2 at 650 -750 °C in high purity CO2. In general, the reaction products were thin and protective in these exposures. A smaller group of alloy coupons focusing on chromia- and alumina-forming alloys was exposed for 500h in 0.1 MPa (1bar) air, CO2, CO2+O2 and CO2+H2O for comparison. Thus, the thin surface oxides formed were very similar to those formed at high pressure and no clear detrimental effect of CO2 oxidation or O2 or H2O impurities could be observed in these exposures.},
doi = {10.1007/s11837-015-1661-8},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
number = 11,
volume = 67,
place = {United States},
year = {Fri Sep 25 00:00:00 EDT 2015},
month = {Fri Sep 25 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
Review of supercritical CO 2 power cycles integrated with CSP
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Effect of pressure and impurities on oxidation in supercritical CO 2
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High-temperature corrosion resistance of nickel-base alloy 617 in supercritical carbon dioxide environment
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