Improving the performance of oxygen transport membranes in simulated oxy-fuel power plant conditions by catalytic surface enhancement

Stéven Pirou*, Julio García-Fayos, María Balaguer, Ragnar Kiebach, José M. Serra

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The stability of dual-phase oxygen transport membranes consisting of 70 vol% (Y2O3)0.01(Sc2O3)0.10(ZrO2)0.89 and 30 vol% MnCo2O4 (10Sc1YSZ-MCO (70-30 vol%)) was investigated in simulated oxy-fuel power plant fluegas (250 ppm SO2, 5% O2, 3% H2O, balance CO2). Additionally, the influence of catalytic porous backbones on the performance of the membrane was studied in the same conditions. The chemical stability of the dual-phase membrane was investigated by X-ray diffraction (XRD), Raman spectroscopy and field emission scanning electron microscopy (FE SEM). The tests performed before and after the exposure to the simulated flue gas showed excellent chemical stability. Electrochemical impedance spectroscopy (EIS) measurements were performed on activated (Ce-Pr catalyst) and non-activated porous catalytic backbones made of: (i) (Y2O3)0.08(ZrO2)0.92 (8YSZ), (ii) 8YSZ-MCO (40–60 vol%),(iii) 10Sc1YSZ-MCO (40–60 vol%), (iv) 10Sc1YSZ-MCO (70-30 vol%), and (v) Ce0.8Tb0.2O2-δ (CTO) - NiFe2O4 (NFO) (40–60 vol%) to achieve a better understanding of the oxygen surface reactions (especially in SO2 and CO2 containing atmospheres). The lowest polarization resistances (Rp) were found for 10Sc1YSZ-MCO (40–60 vol%) and CTO-NFO (40–60 vol%) porous backbones. Oxygen permeation tests realized on 10Sc1YSZ-MCO membranes demonstrated that the catalytic porous backbones can significantly influence the oxygen permeation flux, and improvements of up to55% were achieved. Both EIS and oxygen permeation measurements showed a significant influence of SO2 on the oxygen oxidation/reduction reactions (increaseof Rp, decrease ofoxygen permeation fluxes) due to SO2 adsorption and blocking of active sites for the oxygen reactions. Nevertheless, no microstructural degradation was found after SO2 exposure andinitial Rp values and oxygen permeation fluxes could be recovered in most cases.
Original languageEnglish
JournalJournal of Membrane Science
Volume580
Pages (from-to)307-315
ISSN0376-7388
DOIs
Publication statusPublished - 2019

Keywords

  • Oxygen transport membrane
  • Dual-phase membrane
  • Catalytic backbone
  • SO2 stability
  • Oxy-fuel combustion

Cite this

@article{120b558bed3a425db5b2739b6b5a7379,
title = "Improving the performance of oxygen transport membranes in simulated oxy-fuel power plant conditions by catalytic surface enhancement",
abstract = "The stability of dual-phase oxygen transport membranes consisting of 70 vol{\%} (Y2O3)0.01(Sc2O3)0.10(ZrO2)0.89 and 30 vol{\%} MnCo2O4 (10Sc1YSZ-MCO (70-30 vol{\%})) was investigated in simulated oxy-fuel power plant fluegas (250 ppm SO2, 5{\%} O2, 3{\%} H2O, balance CO2). Additionally, the influence of catalytic porous backbones on the performance of the membrane was studied in the same conditions. The chemical stability of the dual-phase membrane was investigated by X-ray diffraction (XRD), Raman spectroscopy and field emission scanning electron microscopy (FE SEM). The tests performed before and after the exposure to the simulated flue gas showed excellent chemical stability. Electrochemical impedance spectroscopy (EIS) measurements were performed on activated (Ce-Pr catalyst) and non-activated porous catalytic backbones made of: (i) (Y2O3)0.08(ZrO2)0.92 (8YSZ), (ii) 8YSZ-MCO (40–60 vol{\%}),(iii) 10Sc1YSZ-MCO (40–60 vol{\%}), (iv) 10Sc1YSZ-MCO (70-30 vol{\%}), and (v) Ce0.8Tb0.2O2-δ (CTO) - NiFe2O4 (NFO) (40–60 vol{\%}) to achieve a better understanding of the oxygen surface reactions (especially in SO2 and CO2 containing atmospheres). The lowest polarization resistances (Rp) were found for 10Sc1YSZ-MCO (40–60 vol{\%}) and CTO-NFO (40–60 vol{\%}) porous backbones. Oxygen permeation tests realized on 10Sc1YSZ-MCO membranes demonstrated that the catalytic porous backbones can significantly influence the oxygen permeation flux, and improvements of up to55{\%} were achieved. Both EIS and oxygen permeation measurements showed a significant influence of SO2 on the oxygen oxidation/reduction reactions (increaseof Rp, decrease ofoxygen permeation fluxes) due to SO2 adsorption and blocking of active sites for the oxygen reactions. Nevertheless, no microstructural degradation was found after SO2 exposure andinitial Rp values and oxygen permeation fluxes could be recovered in most cases.",
keywords = "Oxygen transport membrane, Dual-phase membrane, Catalytic backbone, SO2 stability, Oxy-fuel combustion",
author = "St{\'e}ven Pirou and Julio Garc{\'i}a-Fayos and Mar{\'i}a Balaguer and Ragnar Kiebach and Serra, {Jos{\'e} M.}",
year = "2019",
doi = "10.1016/j.memsci.2019.03.027",
language = "English",
volume = "580",
pages = "307--315",
journal = "Journal of Membrane Science",
issn = "0376-7388",
publisher = "Elsevier",

}

Improving the performance of oxygen transport membranes in simulated oxy-fuel power plant conditions by catalytic surface enhancement. / Pirou, Stéven; García-Fayos, Julio; Balaguer, María; Kiebach, Ragnar; Serra, José M.

In: Journal of Membrane Science, Vol. 580, 2019, p. 307-315.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Improving the performance of oxygen transport membranes in simulated oxy-fuel power plant conditions by catalytic surface enhancement

AU - Pirou, Stéven

AU - García-Fayos, Julio

AU - Balaguer, María

AU - Kiebach, Ragnar

AU - Serra, José M.

PY - 2019

Y1 - 2019

N2 - The stability of dual-phase oxygen transport membranes consisting of 70 vol% (Y2O3)0.01(Sc2O3)0.10(ZrO2)0.89 and 30 vol% MnCo2O4 (10Sc1YSZ-MCO (70-30 vol%)) was investigated in simulated oxy-fuel power plant fluegas (250 ppm SO2, 5% O2, 3% H2O, balance CO2). Additionally, the influence of catalytic porous backbones on the performance of the membrane was studied in the same conditions. The chemical stability of the dual-phase membrane was investigated by X-ray diffraction (XRD), Raman spectroscopy and field emission scanning electron microscopy (FE SEM). The tests performed before and after the exposure to the simulated flue gas showed excellent chemical stability. Electrochemical impedance spectroscopy (EIS) measurements were performed on activated (Ce-Pr catalyst) and non-activated porous catalytic backbones made of: (i) (Y2O3)0.08(ZrO2)0.92 (8YSZ), (ii) 8YSZ-MCO (40–60 vol%),(iii) 10Sc1YSZ-MCO (40–60 vol%), (iv) 10Sc1YSZ-MCO (70-30 vol%), and (v) Ce0.8Tb0.2O2-δ (CTO) - NiFe2O4 (NFO) (40–60 vol%) to achieve a better understanding of the oxygen surface reactions (especially in SO2 and CO2 containing atmospheres). The lowest polarization resistances (Rp) were found for 10Sc1YSZ-MCO (40–60 vol%) and CTO-NFO (40–60 vol%) porous backbones. Oxygen permeation tests realized on 10Sc1YSZ-MCO membranes demonstrated that the catalytic porous backbones can significantly influence the oxygen permeation flux, and improvements of up to55% were achieved. Both EIS and oxygen permeation measurements showed a significant influence of SO2 on the oxygen oxidation/reduction reactions (increaseof Rp, decrease ofoxygen permeation fluxes) due to SO2 adsorption and blocking of active sites for the oxygen reactions. Nevertheless, no microstructural degradation was found after SO2 exposure andinitial Rp values and oxygen permeation fluxes could be recovered in most cases.

AB - The stability of dual-phase oxygen transport membranes consisting of 70 vol% (Y2O3)0.01(Sc2O3)0.10(ZrO2)0.89 and 30 vol% MnCo2O4 (10Sc1YSZ-MCO (70-30 vol%)) was investigated in simulated oxy-fuel power plant fluegas (250 ppm SO2, 5% O2, 3% H2O, balance CO2). Additionally, the influence of catalytic porous backbones on the performance of the membrane was studied in the same conditions. The chemical stability of the dual-phase membrane was investigated by X-ray diffraction (XRD), Raman spectroscopy and field emission scanning electron microscopy (FE SEM). The tests performed before and after the exposure to the simulated flue gas showed excellent chemical stability. Electrochemical impedance spectroscopy (EIS) measurements were performed on activated (Ce-Pr catalyst) and non-activated porous catalytic backbones made of: (i) (Y2O3)0.08(ZrO2)0.92 (8YSZ), (ii) 8YSZ-MCO (40–60 vol%),(iii) 10Sc1YSZ-MCO (40–60 vol%), (iv) 10Sc1YSZ-MCO (70-30 vol%), and (v) Ce0.8Tb0.2O2-δ (CTO) - NiFe2O4 (NFO) (40–60 vol%) to achieve a better understanding of the oxygen surface reactions (especially in SO2 and CO2 containing atmospheres). The lowest polarization resistances (Rp) were found for 10Sc1YSZ-MCO (40–60 vol%) and CTO-NFO (40–60 vol%) porous backbones. Oxygen permeation tests realized on 10Sc1YSZ-MCO membranes demonstrated that the catalytic porous backbones can significantly influence the oxygen permeation flux, and improvements of up to55% were achieved. Both EIS and oxygen permeation measurements showed a significant influence of SO2 on the oxygen oxidation/reduction reactions (increaseof Rp, decrease ofoxygen permeation fluxes) due to SO2 adsorption and blocking of active sites for the oxygen reactions. Nevertheless, no microstructural degradation was found after SO2 exposure andinitial Rp values and oxygen permeation fluxes could be recovered in most cases.

KW - Oxygen transport membrane

KW - Dual-phase membrane

KW - Catalytic backbone

KW - SO2 stability

KW - Oxy-fuel combustion

U2 - 10.1016/j.memsci.2019.03.027

DO - 10.1016/j.memsci.2019.03.027

M3 - Journal article

VL - 580

SP - 307

EP - 315

JO - Journal of Membrane Science

JF - Journal of Membrane Science

SN - 0376-7388

ER -