Imperial College London
Alternate

DrMarcosMillan-Agorio

Faculty of Engineering, Department of Chemical Engineering

Reader in Chemical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 1633marcos.millan

 
 
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Assistant

 

Mrs Sarah Payne +44 (0)20 7594 5567

 
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Location

 

502Roderic Hill BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Bermudez:2018:10.1016/j.memsci.2018.05.012,
author = {Bermudez, JM and Garcia-Fayos, J and Reina, TR and Reed, G and Persoon, ES and Görtz, D and Schroeder, M and Millan, M and Serra, JM},
doi = {10.1016/j.memsci.2018.05.012},
journal = {Journal of Membrane Science},
pages = {26--37},
title = {Thermochemical stability of La<inf>x</inf>Sr<inf>1-x</inf>Co<inf>y</inf>Fe<inf>1-y</inf>O<inf>3-Δ</inf>and NiFe<inf>2</inf>O<inf>4</inf>-Ce<inf>0.8</inf>Tb<inf>0.2</inf>O<inf>2-Δ</inf>under real conditions for its application in oxygen transport membranes for oxyfuel combustion},
url = {http://dx.doi.org/10.1016/j.memsci.2018.05.012},
volume = {562},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - © 2018 This work addresses the thermochemical stability of ceramic materials –typically used in oxygen transport membranes– under the harsh gas environments found in oxyfuel combustion processes. Specifically, a dual-phase NiFe2O4-Ce0.8Tb0.2O2-δ(NFO-CTO) composite and a single-phase La0.6Sr0.4Co0.2Fe0.8O3-δ(LSCF) were studied. The effect of the main contaminants present in this kind of processes (CO2, SO2and H2O) has been tested. NFO-CTO composite remains stable under all the conditions studied whereas LSCF presents a poor stability in the presence of CO2and SO2. Regardless of the treatment, NFO-CTO conserves its crystalline structure, without giving rise to new species due to segregation or incorporation of sulphur and/or carbon. On the contrary, LSCF is prone to degradation in contact with CO2and SO2, segregating Sr in the form of SrCO3and SrSO4and Co and Fe in the form of CoO and Fe3O4. It is also shown that SO2interaction with LSCF is stronger than in the case of CO2. A concentration of just 2000 ppm of SO2in CO2is enough to subdue the formation of SrCO3, promoting the segregation of Sr only in the form of SrSO4. With the results presented in this work, it is possible to conclude that the NFO-CTO is a suitable candidate from the thermochemical viewpoint to be used as membrane material in 4-end modules for oxygen generation integrated into oxyfuel combustion processes whereas the use of LSCF should be dismissed.
AU  - Bermudez,JM
AU  - Garcia-Fayos,J
AU  - Reina,TR
AU  - Reed,G
AU  - Persoon,ES
AU  - Görtz,D
AU  - Schroeder,M
AU  - Millan,M
AU  - Serra,JM
DO  - 10.1016/j.memsci.2018.05.012
EP  - 37
PY  - 2018///
SN  - 0376-7388
SP  - 26
TI  - Thermochemical stability of La<inf>x</inf>Sr<inf>1-x</inf>Co<inf>y</inf>Fe<inf>1-y</inf>O<inf>3-Δ</inf>and NiFe<inf>2</inf>O<inf>4</inf>-Ce<inf>0.8</inf>Tb<inf>0.2</inf>O<inf>2-Δ</inf>under real conditions for its application in oxygen transport membranes for oxyfuel combustion
T2  - Journal of Membrane Science
UR  - http://dx.doi.org/10.1016/j.memsci.2018.05.012
VL  - 562
ER  -
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