TY - JOUR
T1 - Design and optimization of porous ceramic supports for asymmetric ceria-based oxygen transport membranes
AU - Kaiser, Andreas
AU - Foghmoes, Søren Preben Vagn
AU - Pećanac, G.
AU - Malzbender, J.
AU - Chatzichristodoulou, Christodoulos
AU - Glasscock, Julie
AU - Kothanda Ramachandran, Dhavanesan
AU - Ni, De Wei
AU - Esposito, Vincenzo
AU - Søgaard, Martin
AU - Hendriksen, Peter Vang
PY - 2016
Y1 - 2016
N2 - The microstructure, mechanical properties and gas permeability of porous supports of Ce0.9Gd0.1O1.95−δ (CGO) were investigated as a function of sintering temperature and volume fraction of pore former for use in planar asymmetric oxygen transport membranes (OTMs). With increasing the pore former content from 11 vol% to 16 vol%, the gas permeabilities increased by a factor of 5 when support tapes were sintered to comparable densities. The improved permeabilities were due to a more favourable microstructure with larger interconnected pores at a porosity of 45% and a fracture strength of 47±2 MPa (m=7). The achieved gas permeability of 2.25×10−15 m2 for a 0.4 mm thick support will not limit the gas transport for oxygen production but in partial oxidation of methane to syngas at higher oxygen fluxes. For integration of the CGO support layer into a flat, asymmetric CGO membrane, the sintering activity of the CGO membrane was reduced by Fe2O3 addition (replacing Co3O4 as sintering additive).
AB - The microstructure, mechanical properties and gas permeability of porous supports of Ce0.9Gd0.1O1.95−δ (CGO) were investigated as a function of sintering temperature and volume fraction of pore former for use in planar asymmetric oxygen transport membranes (OTMs). With increasing the pore former content from 11 vol% to 16 vol%, the gas permeabilities increased by a factor of 5 when support tapes were sintered to comparable densities. The improved permeabilities were due to a more favourable microstructure with larger interconnected pores at a porosity of 45% and a fracture strength of 47±2 MPa (m=7). The achieved gas permeability of 2.25×10−15 m2 for a 0.4 mm thick support will not limit the gas transport for oxygen production but in partial oxidation of methane to syngas at higher oxygen fluxes. For integration of the CGO support layer into a flat, asymmetric CGO membrane, the sintering activity of the CGO membrane was reduced by Fe2O3 addition (replacing Co3O4 as sintering additive).
KW - Oxygen transport membrane
KW - Ceramic support
KW - Mechanical properties
KW - Gas permeability
KW - Co-firing
U2 - 10.1016/j.memsci.2016.04.016
DO - 10.1016/j.memsci.2016.04.016
M3 - Journal article
SN - 0376-7388
VL - 513
SP - 85
EP - 94
JO - Journal of Membrane Science
JF - Journal of Membrane Science
ER -