H2S poisoning and regeneration of Ni-BaZr0.1Ce0.7Y0.2O3-δ at intermediate temperature

Shumin Fang; Lei Bi; Chunli Yang; Litao Yan; Chusheng Chen; Wei Liu

doi:10.1016/j.jallcom.2008.08.070

H₂S poisoning and regeneration of Ni-BaZr_0.1Ce_0.7Y_0.2O_3-δ at intermediate temperature

Shumin Fang, Lei Bi, Chunli Yang, Litao Yan, Chusheng Chen, Wei Liu^*

^*Corresponding author for this work

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

23 Scopus citations

Abstract

Hydrogen permeation flux of Ni-BaZr_0.1Ce_0.7Y_0.2O_3-δ cermet (ceramic-metal composite) was measured in an H₂S-containing atmosphere at 973 K. In 30 and 60 ppm H₂S, the hydrogen permeation flux decreased by about 20% and 30%, respectively. After the removal of H₂S, the hydrogen permeation flux recovered partially in several hours and then remained stable. After exposing to 60 ppm H₂S, X-ray diffraction (XRD) analysis revealed a little formation of Ni₃S₂, BaS, and doped CeO₂. Thermodynamic calculation results showed that the critical value of pH₂S/pH₂ for the formation of Ni₃S₂ was about 0.0066 at 973 K, suggesting that the Ni₃S₂ found after testing was formed in the cooling process. The reaction between H₂S and BaCeO₃ was rather weak and could not be the cause of the performance loss. Analysis of poisoning and regeneration behavior suggested that the adsorption of sulfur on nickel surface caused the performance loss.

Original language	English (US)
Pages (from-to)	935-939
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	475
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2008.08.070
State	Published - May 5 2009
Externally published	Yes

Keywords

Composite materials
Microstructure
Solid state reaction
X-ray diffraction

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2008.08.070

Cite this

@article{691a2824b9c74c63ba336a87471a066a,

title = "H2S poisoning and regeneration of Ni-BaZr0.1Ce0.7Y0.2O3-δ at intermediate temperature",

abstract = "Hydrogen permeation flux of Ni-BaZr0.1Ce0.7Y0.2O3-δ cermet (ceramic-metal composite) was measured in an H2S-containing atmosphere at 973 K. In 30 and 60 ppm H2S, the hydrogen permeation flux decreased by about 20% and 30%, respectively. After the removal of H2S, the hydrogen permeation flux recovered partially in several hours and then remained stable. After exposing to 60 ppm H2S, X-ray diffraction (XRD) analysis revealed a little formation of Ni3S2, BaS, and doped CeO2. Thermodynamic calculation results showed that the critical value of pH2S/pH2 for the formation of Ni3S2 was about 0.0066 at 973 K, suggesting that the Ni3S2 found after testing was formed in the cooling process. The reaction between H2S and BaCeO3 was rather weak and could not be the cause of the performance loss. Analysis of poisoning and regeneration behavior suggested that the adsorption of sulfur on nickel surface caused the performance loss.",

keywords = "Composite materials, Microstructure, Solid state reaction, X-ray diffraction",

author = "Shumin Fang and Lei Bi and Chunli Yang and Litao Yan and Chusheng Chen and Wei Liu",

year = "2009",

month = may,

day = "5",

doi = "10.1016/j.jallcom.2008.08.070",

language = "English (US)",

volume = "475",

pages = "935--939",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

number = "1-2",

}

TY - JOUR

T1 - H2S poisoning and regeneration of Ni-BaZr0.1Ce0.7Y0.2O3-δ at intermediate temperature

AU - Fang, Shumin

AU - Bi, Lei

AU - Yang, Chunli

AU - Yan, Litao

AU - Chen, Chusheng

AU - Liu, Wei

PY - 2009/5/5

Y1 - 2009/5/5

N2 - Hydrogen permeation flux of Ni-BaZr0.1Ce0.7Y0.2O3-δ cermet (ceramic-metal composite) was measured in an H2S-containing atmosphere at 973 K. In 30 and 60 ppm H2S, the hydrogen permeation flux decreased by about 20% and 30%, respectively. After the removal of H2S, the hydrogen permeation flux recovered partially in several hours and then remained stable. After exposing to 60 ppm H2S, X-ray diffraction (XRD) analysis revealed a little formation of Ni3S2, BaS, and doped CeO2. Thermodynamic calculation results showed that the critical value of pH2S/pH2 for the formation of Ni3S2 was about 0.0066 at 973 K, suggesting that the Ni3S2 found after testing was formed in the cooling process. The reaction between H2S and BaCeO3 was rather weak and could not be the cause of the performance loss. Analysis of poisoning and regeneration behavior suggested that the adsorption of sulfur on nickel surface caused the performance loss.

AB - Hydrogen permeation flux of Ni-BaZr0.1Ce0.7Y0.2O3-δ cermet (ceramic-metal composite) was measured in an H2S-containing atmosphere at 973 K. In 30 and 60 ppm H2S, the hydrogen permeation flux decreased by about 20% and 30%, respectively. After the removal of H2S, the hydrogen permeation flux recovered partially in several hours and then remained stable. After exposing to 60 ppm H2S, X-ray diffraction (XRD) analysis revealed a little formation of Ni3S2, BaS, and doped CeO2. Thermodynamic calculation results showed that the critical value of pH2S/pH2 for the formation of Ni3S2 was about 0.0066 at 973 K, suggesting that the Ni3S2 found after testing was formed in the cooling process. The reaction between H2S and BaCeO3 was rather weak and could not be the cause of the performance loss. Analysis of poisoning and regeneration behavior suggested that the adsorption of sulfur on nickel surface caused the performance loss.

KW - Composite materials

KW - Microstructure

KW - Solid state reaction

KW - X-ray diffraction

UR - http://www.scopus.com/inward/record.url?scp=63649152129&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2008.08.070

DO - 10.1016/j.jallcom.2008.08.070

M3 - Article

AN - SCOPUS:63649152129

SN - 0925-8388

VL - 475

SP - 935

EP - 939

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -