Oxidation behavior of metallic interconnects for SOFC in coal syngas

Yihong Li; Junwei Wu; Christopher Johnson; Randall Gemmen; X. Mao Scott; Xingbo Liu

doi:10.1016/j.ijhydene.2008.11.050

Oxidation behavior of metallic interconnects for SOFC in coal syngas

Yihong Li
, Junwei Wu
, Christopher Johnson
, Randall Gemmen
, X. Mao Scott
, Xingbo Liu^*

^*Corresponding author for this work

National Energy Technology Laboratory, Morgantown
West Virginia University
University of Pittsburgh

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

30 Scopus citations

Abstract

Crofer 22 and Haynes 230 alloys, which are candidates for solid oxide fuel cell (SOFC) interconnects, were exposed at 800 °C to a simulated coal syngas (29.1CO + 28.5H₂ +11.8CO₂ + 27.6H₂O + 2.1N₂ + 0.01CH₄) and air. The samples were characterized by SEM/EDS, XRD and ASR. Results indicated that the compositions of the oxide scales in syngas and in air were similar. For Crofer 22, scales formed in both air and coal syngas were composed of (Cr,Fe)₂O₃, Mn-Cr compounds and Fe₃O₄. For Haynes 230 the main composition was Cr₂O₃. However, it was found that the morphologies of the scales formed in coal syngas were different from those formed in air. Besides, the cross section element distributions of oxide scales formed on Crofer 22 were disparate. In addition, the ASR values of the oxide scales formed in coal syngas and in air were similar at 800 °C but the activation energies for electronic conduction of the oxide scales formed in coal syngas were higher.

Original language	English
Pages (from-to)	1489-1496
Number of pages	8
Journal	International Journal of Hydrogen Energy
Volume	34
Issue number	3
DOIs	https://doi.org/10.1016/j.ijhydene.2008.11.050
State	Published - Feb 2009
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Coal syngas
Interconnects
Oxidation
SOFC

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10.1016/j.ijhydene.2008.11.050

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@article{4033d15f620b4eb5a32f8830b53cd9d8,

title = "Oxidation behavior of metallic interconnects for SOFC in coal syngas",

abstract = "Crofer 22 and Haynes 230 alloys, which are candidates for solid oxide fuel cell (SOFC) interconnects, were exposed at 800 °C to a simulated coal syngas (29.1CO + 28.5H2 +11.8CO2 + 27.6H2O + 2.1N2 + 0.01CH4) and air. The samples were characterized by SEM/EDS, XRD and ASR. Results indicated that the compositions of the oxide scales in syngas and in air were similar. For Crofer 22, scales formed in both air and coal syngas were composed of (Cr,Fe)2O3, Mn-Cr compounds and Fe3O4. For Haynes 230 the main composition was Cr2O3. However, it was found that the morphologies of the scales formed in coal syngas were different from those formed in air. Besides, the cross section element distributions of oxide scales formed on Crofer 22 were disparate. In addition, the ASR values of the oxide scales formed in coal syngas and in air were similar at 800 °C but the activation energies for electronic conduction of the oxide scales formed in coal syngas were higher.",

keywords = "Coal syngas, Interconnects, Oxidation, SOFC",

author = "Yihong Li and Junwei Wu and Christopher Johnson and Randall Gemmen and Scott, \{X. Mao\} and Xingbo Liu",

year = "2009",

month = feb,

doi = "10.1016/j.ijhydene.2008.11.050",

language = "英语",

volume = "34",

pages = "1489--1496",

journal = "International Journal of Hydrogen Energy",

issn = "0360-3199",

publisher = "Elsevier Ltd",

number = "3",

}

TY - JOUR

T1 - Oxidation behavior of metallic interconnects for SOFC in coal syngas

AU - Li, Yihong

AU - Wu, Junwei

AU - Johnson, Christopher

AU - Gemmen, Randall

AU - Scott, X. Mao

AU - Liu, Xingbo

PY - 2009/2

Y1 - 2009/2

N2 - Crofer 22 and Haynes 230 alloys, which are candidates for solid oxide fuel cell (SOFC) interconnects, were exposed at 800 °C to a simulated coal syngas (29.1CO + 28.5H2 +11.8CO2 + 27.6H2O + 2.1N2 + 0.01CH4) and air. The samples were characterized by SEM/EDS, XRD and ASR. Results indicated that the compositions of the oxide scales in syngas and in air were similar. For Crofer 22, scales formed in both air and coal syngas were composed of (Cr,Fe)2O3, Mn-Cr compounds and Fe3O4. For Haynes 230 the main composition was Cr2O3. However, it was found that the morphologies of the scales formed in coal syngas were different from those formed in air. Besides, the cross section element distributions of oxide scales formed on Crofer 22 were disparate. In addition, the ASR values of the oxide scales formed in coal syngas and in air were similar at 800 °C but the activation energies for electronic conduction of the oxide scales formed in coal syngas were higher.

AB - Crofer 22 and Haynes 230 alloys, which are candidates for solid oxide fuel cell (SOFC) interconnects, were exposed at 800 °C to a simulated coal syngas (29.1CO + 28.5H2 +11.8CO2 + 27.6H2O + 2.1N2 + 0.01CH4) and air. The samples were characterized by SEM/EDS, XRD and ASR. Results indicated that the compositions of the oxide scales in syngas and in air were similar. For Crofer 22, scales formed in both air and coal syngas were composed of (Cr,Fe)2O3, Mn-Cr compounds and Fe3O4. For Haynes 230 the main composition was Cr2O3. However, it was found that the morphologies of the scales formed in coal syngas were different from those formed in air. Besides, the cross section element distributions of oxide scales formed on Crofer 22 were disparate. In addition, the ASR values of the oxide scales formed in coal syngas and in air were similar at 800 °C but the activation energies for electronic conduction of the oxide scales formed in coal syngas were higher.

KW - Coal syngas

KW - Interconnects

KW - Oxidation

KW - SOFC

UR - https://www.scopus.com/pages/publications/58649091741

U2 - 10.1016/j.ijhydene.2008.11.050

DO - 10.1016/j.ijhydene.2008.11.050

M3 - 文章

AN - SCOPUS:58649091741

SN - 0360-3199

VL - 34

SP - 1489

EP - 1496

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 3

ER -

Oxidation behavior of metallic interconnects for SOFC in coal syngas

Abstract

UN SDGs

Keywords

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