TY - JOUR
T1 - Mixed ionic-electronic conducting (MIEC) ceramic-based membranes for oxygen separation
AU - Sunarso, J.
AU - Baumann, S.
AU - Serra, J. M.
AU - Meulenberg, W. A.
AU - Liu, S.
AU - Lin, Jerry
AU - Diniz da Costa, J. C.
N1 - Funding Information:
Jaka Sunarso acknowledges the scholarship provided by the University of Queensland. Joe da Costa acknowledges financial support by the UQ Foundation Research in Excellence Awards. Shaomin Liu acknowledges the ARC fellowship provided by the Australian Research Council. The authors thank Prof. Kang Li (Imperial College) and Dr. John Bradley (University of Queensland) for useful feedback and discussions on some of the topics addressed in this paper.
PY - 2008/7/15
Y1 - 2008/7/15
N2 - Although Nernst observed ionic conduction of zirconia-yttria solutions in 1899, the field of oxygen separation research remained dormant. In the last 30 years, research efforts by the scientific community intensified significantly, stemming from the pioneering work of Takahashi and co-workers, with the initial development of mixed ionic-electronic conducting (MIEC) oxides. A large number of MIEC compounds have been synthesized and characterized since then, mainly based on perovskites (ABO3-esiδ and A2BO4±δ) and fluorites (AδB1-δO2-δ and A2δB2-2δO3), or dual-phases by the introduction of metal or ceramic elements. These compounds form dense ceramic membranes, which exhibit significant oxygen ionic and electronic conductivity at elevated temperatures. In turn, this process allows for the ionic transport of oxygen from air due to the differential partial pressure of oxygen across the membrane, providing the driving force for oxygen ion transport. As a result, defect-free synthesized membranes deliver 100% pure oxygen. Electrons involved in the electrochemical oxidation and reduction of oxygen ions and oxygen molecules respectively are transported in the opposite direction, thus ensuring overall electrical neutrality. Notably, the fundamental application of the defect theory was deduced to a plethora of MIEC materials over the last 30 years, providing the understanding of electronic and ionic transport, in particular when dopants are introduced to the compound of interest. As a consequence, there are many special cases of ionic oxygen transport limitation accompanied by phase changes, depending upon the temperature and oxygen partial pressure operating conditions. This paper aims at reviewing all the significant and relevant contribution of the research community in this area in the last three decades in conjunction with theoretical principles.
AB - Although Nernst observed ionic conduction of zirconia-yttria solutions in 1899, the field of oxygen separation research remained dormant. In the last 30 years, research efforts by the scientific community intensified significantly, stemming from the pioneering work of Takahashi and co-workers, with the initial development of mixed ionic-electronic conducting (MIEC) oxides. A large number of MIEC compounds have been synthesized and characterized since then, mainly based on perovskites (ABO3-esiδ and A2BO4±δ) and fluorites (AδB1-δO2-δ and A2δB2-2δO3), or dual-phases by the introduction of metal or ceramic elements. These compounds form dense ceramic membranes, which exhibit significant oxygen ionic and electronic conductivity at elevated temperatures. In turn, this process allows for the ionic transport of oxygen from air due to the differential partial pressure of oxygen across the membrane, providing the driving force for oxygen ion transport. As a result, defect-free synthesized membranes deliver 100% pure oxygen. Electrons involved in the electrochemical oxidation and reduction of oxygen ions and oxygen molecules respectively are transported in the opposite direction, thus ensuring overall electrical neutrality. Notably, the fundamental application of the defect theory was deduced to a plethora of MIEC materials over the last 30 years, providing the understanding of electronic and ionic transport, in particular when dopants are introduced to the compound of interest. As a consequence, there are many special cases of ionic oxygen transport limitation accompanied by phase changes, depending upon the temperature and oxygen partial pressure operating conditions. This paper aims at reviewing all the significant and relevant contribution of the research community in this area in the last three decades in conjunction with theoretical principles.
KW - Dense ceramic membrane
KW - Fluorite
KW - Mixed ionic-electronic conduction
KW - Perovskite
KW - Synthesis methods
KW - Transport mechanisms
UR - http://www.scopus.com/inward/record.url?scp=49049104566&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=49049104566&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2008.03.074
DO - 10.1016/j.memsci.2008.03.074
M3 - Review article
AN - SCOPUS:49049104566
SN - 0376-7388
VL - 320
SP - 13
EP - 41
JO - Journal of Membrane Science
JF - Journal of Membrane Science
IS - 1-2
ER -