Details
| Original language | English |
|---|---|
| Pages (from-to) | 14478-14485 |
| Number of pages | 8 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 43 |
| Issue number | 31 |
| Early online date | 28 Jun 2018 |
| Publication status | Published - 2 Aug 2018 |
Abstract
Coupling of partial oxidation of methane (POM) with water dissociation in an oxygen transport membrane is a promising technology for methane utilization. However, cobalt-based membrane materials show poor stability under the above harsh conditions. In this work, a nominal 60 wt % Ce0.8Sm0.2O2-δ-40 wt % Sr2Fe1.5Mo0.5O5+δ (CSO-SFMO) dual phase membrane is reported, which was synthesized by using a one-pot EDTA-citric acid complexing method. The phase structure and morphology of the CSO-SFMO membrane were characterized by XRD, SEM and EDXS. It was found that a uniform distribution of CSO phase with a fluorite structure and SFMO phase with a perovskite structure was achieved in the dual phase membrane. The CSO-SFMO membrane exhibited an improved stability compared with cobalt based perovskite Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) membrane under CO2 or reductive gas atmospheres. The oxygen permeation flux of the dual phase membrane was investigated under different oxygen partial pressure gradients: air/He, air/CO2, air/POM, and H2O/POM. At 950 °C, the oxygen permeation fluxes of the CSO-SFMO membrane under air/POM and H2O/POM gradients were 2.7 cm3 (STP) min−1 cm−2 and 0.75 cm3 (STP) min−1 cm−2, respectively, which were much higher than the oxygen flux of 0.1 cm3 (STP) min−1 cm−2 under air/He. Moreover, a CO selectivity of 98%, a CH4 conversion of 97% on the POM side and a H2 production of 1.5 cm3 (STP) min−1 cm−2 on the H2O splitting side were achieved in CSO-SFMO membrane reactor under the oxygen partial pressure gradient of H2O/POM, which was steadily run for 100 h before the measurement was intentionally stopped.
Keywords
- Hydrogen, Oxygen transport membrane, Partial oxidation of methane (POM), Water splitting
ASJC Scopus subject areas
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Energy(all)
- Fuel Technology
- Physics and Astronomy(all)
- Condensed Matter Physics
- Energy(all)
- Energy Engineering and Power Technology
Sustainable Development Goals
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In: International Journal of Hydrogen Energy, Vol. 43, No. 31, 02.08.2018, p. 14478-14485.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Methane conversion to syngas and hydrogen in a dual phase Ce0.8Sm0.2O2-Δ-Sr2Fe1.5Mo0.5O5+Δ membrane reactor with improved stability
AU - Liang, Wenyuan
AU - Zhou, Hangyue
AU - Caro, Jürgen
AU - Jiang, Heqing
N1 - Publisher Copyright: © 2018 Hydrogen Energy Publications LLC
PY - 2018/8/2
Y1 - 2018/8/2
N2 - Coupling of partial oxidation of methane (POM) with water dissociation in an oxygen transport membrane is a promising technology for methane utilization. However, cobalt-based membrane materials show poor stability under the above harsh conditions. In this work, a nominal 60 wt % Ce0.8Sm0.2O2-δ-40 wt % Sr2Fe1.5Mo0.5O5+δ (CSO-SFMO) dual phase membrane is reported, which was synthesized by using a one-pot EDTA-citric acid complexing method. The phase structure and morphology of the CSO-SFMO membrane were characterized by XRD, SEM and EDXS. It was found that a uniform distribution of CSO phase with a fluorite structure and SFMO phase with a perovskite structure was achieved in the dual phase membrane. The CSO-SFMO membrane exhibited an improved stability compared with cobalt based perovskite Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) membrane under CO2 or reductive gas atmospheres. The oxygen permeation flux of the dual phase membrane was investigated under different oxygen partial pressure gradients: air/He, air/CO2, air/POM, and H2O/POM. At 950 °C, the oxygen permeation fluxes of the CSO-SFMO membrane under air/POM and H2O/POM gradients were 2.7 cm3 (STP) min−1 cm−2 and 0.75 cm3 (STP) min−1 cm−2, respectively, which were much higher than the oxygen flux of 0.1 cm3 (STP) min−1 cm−2 under air/He. Moreover, a CO selectivity of 98%, a CH4 conversion of 97% on the POM side and a H2 production of 1.5 cm3 (STP) min−1 cm−2 on the H2O splitting side were achieved in CSO-SFMO membrane reactor under the oxygen partial pressure gradient of H2O/POM, which was steadily run for 100 h before the measurement was intentionally stopped.
AB - Coupling of partial oxidation of methane (POM) with water dissociation in an oxygen transport membrane is a promising technology for methane utilization. However, cobalt-based membrane materials show poor stability under the above harsh conditions. In this work, a nominal 60 wt % Ce0.8Sm0.2O2-δ-40 wt % Sr2Fe1.5Mo0.5O5+δ (CSO-SFMO) dual phase membrane is reported, which was synthesized by using a one-pot EDTA-citric acid complexing method. The phase structure and morphology of the CSO-SFMO membrane were characterized by XRD, SEM and EDXS. It was found that a uniform distribution of CSO phase with a fluorite structure and SFMO phase with a perovskite structure was achieved in the dual phase membrane. The CSO-SFMO membrane exhibited an improved stability compared with cobalt based perovskite Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) membrane under CO2 or reductive gas atmospheres. The oxygen permeation flux of the dual phase membrane was investigated under different oxygen partial pressure gradients: air/He, air/CO2, air/POM, and H2O/POM. At 950 °C, the oxygen permeation fluxes of the CSO-SFMO membrane under air/POM and H2O/POM gradients were 2.7 cm3 (STP) min−1 cm−2 and 0.75 cm3 (STP) min−1 cm−2, respectively, which were much higher than the oxygen flux of 0.1 cm3 (STP) min−1 cm−2 under air/He. Moreover, a CO selectivity of 98%, a CH4 conversion of 97% on the POM side and a H2 production of 1.5 cm3 (STP) min−1 cm−2 on the H2O splitting side were achieved in CSO-SFMO membrane reactor under the oxygen partial pressure gradient of H2O/POM, which was steadily run for 100 h before the measurement was intentionally stopped.
KW - Hydrogen
KW - Oxygen transport membrane
KW - Partial oxidation of methane (POM)
KW - Water splitting
UR - http://www.scopus.com/inward/record.url?scp=85049003363&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2018.06.008
DO - 10.1016/j.ijhydene.2018.06.008
M3 - Article
AN - SCOPUS:85049003363
VL - 43
SP - 14478
EP - 14485
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 31
ER -