Details
| Original language | English |
|---|---|
| Pages (from-to) | 2148-2154 |
| Number of pages | 7 |
| Journal | Chemistry of materials |
| Volume | 24 |
| Issue number | 11 |
| Early online date | 30 May 2012 |
| Publication status | Published - 12 Jun 2012 |
Abstract
A novel cobalt-free and noble metal-free dual-phase oxygen-transporting membrane with a composition of 40 wt % Pr 0.6Sr 0.4FeO 3-δ-60 wt % Ce 0.9Pr 0.1O 2-δ (40PSFO-60CPO) has been successfully developed via an in situ one-pot one-step glycine-nitrate combustion process. In situ XRD demonstrated that the 40PSFO-60CPO dual-phase membrane shows a good phase stability not only in air but also in 50 vol % CO 2/50 vol % N 2 atmosphere. When using pure He or pure CO 2 as sweep gases, at 950 °C steady oxygen permeation fluxes of 0.26 cm 3 min -1 cm -2 and 0.18 cm 3 min -1 cm -2 are obtained through the 40PSFO-60CPO dual-phase membrane. The partial oxidation of methane (POM) to syngas was also successfully investigated in the 40PSFO-60CPO dual-phase membrane reactor. Methane conversion was found to be higher than 99.0% with 97.0% CO selectivity and 4.4 cm 3 min -1 cm -2 oxygen permeation flux in steady state at 950 °C. Our dual-phase membrane - without any noble metals such as Ag, Pd or easily reducible metals oxides of Co or Ni - exhibits high oxygen permeation fluxes as well as good phase stability at high temperatures. Furthermore, the dual-phase membrane shows a good chemical stability under the harsh conditions of the POM reaction and in a CO 2 atmosphere at high temperatures.
Keywords
- CO -stable membrane, dual-phase membrane, glycine-nitrate combustion process (GNP), oxygen permeation, partial oxidation of methane (POM)
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
- Materials Science(all)
- Materials Chemistry
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In: Chemistry of materials, Vol. 24, No. 11, 12.06.2012, p. 2148-2154.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Novel cobalt-free, noble metal-free oxygen-permeable 40Pr 0.6Sr 0.4FeO 3-δ-60Ce 0.9Pr 0.1O 2-δ dual-phase membrane
AU - Luo, Huixia
AU - Jiang, Heqing
AU - Klande, Tobias
AU - Cao, Zhengwen
AU - Liang, Fangyi
AU - Wang, Haihui
AU - Caro, Jürgen
PY - 2012/6/12
Y1 - 2012/6/12
N2 - A novel cobalt-free and noble metal-free dual-phase oxygen-transporting membrane with a composition of 40 wt % Pr 0.6Sr 0.4FeO 3-δ-60 wt % Ce 0.9Pr 0.1O 2-δ (40PSFO-60CPO) has been successfully developed via an in situ one-pot one-step glycine-nitrate combustion process. In situ XRD demonstrated that the 40PSFO-60CPO dual-phase membrane shows a good phase stability not only in air but also in 50 vol % CO 2/50 vol % N 2 atmosphere. When using pure He or pure CO 2 as sweep gases, at 950 °C steady oxygen permeation fluxes of 0.26 cm 3 min -1 cm -2 and 0.18 cm 3 min -1 cm -2 are obtained through the 40PSFO-60CPO dual-phase membrane. The partial oxidation of methane (POM) to syngas was also successfully investigated in the 40PSFO-60CPO dual-phase membrane reactor. Methane conversion was found to be higher than 99.0% with 97.0% CO selectivity and 4.4 cm 3 min -1 cm -2 oxygen permeation flux in steady state at 950 °C. Our dual-phase membrane - without any noble metals such as Ag, Pd or easily reducible metals oxides of Co or Ni - exhibits high oxygen permeation fluxes as well as good phase stability at high temperatures. Furthermore, the dual-phase membrane shows a good chemical stability under the harsh conditions of the POM reaction and in a CO 2 atmosphere at high temperatures.
AB - A novel cobalt-free and noble metal-free dual-phase oxygen-transporting membrane with a composition of 40 wt % Pr 0.6Sr 0.4FeO 3-δ-60 wt % Ce 0.9Pr 0.1O 2-δ (40PSFO-60CPO) has been successfully developed via an in situ one-pot one-step glycine-nitrate combustion process. In situ XRD demonstrated that the 40PSFO-60CPO dual-phase membrane shows a good phase stability not only in air but also in 50 vol % CO 2/50 vol % N 2 atmosphere. When using pure He or pure CO 2 as sweep gases, at 950 °C steady oxygen permeation fluxes of 0.26 cm 3 min -1 cm -2 and 0.18 cm 3 min -1 cm -2 are obtained through the 40PSFO-60CPO dual-phase membrane. The partial oxidation of methane (POM) to syngas was also successfully investigated in the 40PSFO-60CPO dual-phase membrane reactor. Methane conversion was found to be higher than 99.0% with 97.0% CO selectivity and 4.4 cm 3 min -1 cm -2 oxygen permeation flux in steady state at 950 °C. Our dual-phase membrane - without any noble metals such as Ag, Pd or easily reducible metals oxides of Co or Ni - exhibits high oxygen permeation fluxes as well as good phase stability at high temperatures. Furthermore, the dual-phase membrane shows a good chemical stability under the harsh conditions of the POM reaction and in a CO 2 atmosphere at high temperatures.
KW - CO -stable membrane
KW - dual-phase membrane
KW - glycine-nitrate combustion process (GNP)
KW - oxygen permeation
KW - partial oxidation of methane (POM)
UR - http://www.scopus.com/inward/record.url?scp=84862236739&partnerID=8YFLogxK
U2 - 10.1021/cm300710p
DO - 10.1021/cm300710p
M3 - Article
AN - SCOPUS:84862236739
VL - 24
SP - 2148
EP - 2154
JO - Chemistry of materials
JF - Chemistry of materials
SN - 0897-4756
IS - 11
ER -