The need to reduce CO2 emissions from fossil-fuel based power production creates the need for new power plant solutions where the CO2 is captured and stored or reused. Oxygen Transfer Membrane (OTM) is the key component of oxy-fuel combustion processes as pure oxygen is usually required to process reactions (e.g. Natural Gas Combined cycle NGCC, Pulverised Coal-fired power plants PC-plants, Integrated Gasification Combined Cycle IGCC). The transfer of oxygen across such OTM is limited by a number of processes, such as surface exchange and ambipolar diffusion through mixed-conducting gas separation layer. This paper shows a mathematical model of an oxygen transfer membrane incorporated into OTM reactor (OTM reactor consists of High Temperature Heat Exchanger and OTM), where transient behavior takes place. The modeling of the OTM reactor has been carried out to show the importance of optimizing OTM parameters (temperatures, oxygen partial pressures, oxygen flux) and reactor design that enables a high oxygen transfer for optimum performance of future power cycles with CO2 capture. All modeling work was carried out in the modeling language Modelica, which is an open standard for equation-based, object-oriented modeling of physical systems. The OTM reactor model has been built using the CombiPlant Library, a modeling library for combined cycle power plants which is under development.

1.
Selimovic F., B. Sunden, M. Assadi, and A. Selimovic, Computational Analysis of an O2 Separating Membrane for a CO2-Emission-Free Power Process, In Proceedings of ASME, IMECE2004–59382, 2004.
2.
Bouwmeester
H. J. M.
,
Dense ceramic membranes for methane conversion
,
Cat. Today
, Vol.
82
, pp.
141
150
,
2003
3.
Kharton
V. V.
,
Yaremchenko
A. A.
,
Kovalevsky
A. V.
,
Viskup
A. P.
,
Naumovic
E. N.
,
Kerko
P. F.
,
Perovskite-type oxides for high-temperature oxygen separation membranes
,
Journal of Membrane Science
, Vol.
163
, pp.
307
317
;
1999
4.
Lee
T. H.
,
Yang
Y. L.
,
Jacobson
A. J.
,
Abeles
B.
,
Milner
S.
,
Oxygen permeation in SrCo0.8Fe0.2O3-d
,
Solid State Ionic
, Vol.
100
, pp.
87
97
,
1997
5.
Wiik
K.
,
Aasland
S.
,
Hansen
H. L.
,
Tangen
I. L.
,
Odegrd
R.
,
Oxygen permeation in the system SrFeO3.x-SrCoO3.x
,
Solid State Ionics
, Vol.
152–153
, pp.
675
680
,
2002
.
6.
Lu
H.
,
Cong
Y.
, and
Yang
W. S.
,
Oxygen permeability and stability of Ba0.5Sr0.5Co0.8Fe0.2O2-d as an oxygen permeable membrane at high pressures
,
Solid State Ionics
, Vol.
177
, pp.
595
600
,
2006
7.
Lu
H.
,
Tong
J.
, and
Cong
Y.
,
Partial oxydation of methane in Ba0.5Sr0.5Co0.8Fe0.2O2-d membrane reactor at high pressures
,
Cat. Today
, Vol.
104
, pp.
154
159
,
2005
8.
Eborn J., On Model Libraries for Thermo-hydraulic Applications. PhD thesis, Department of Automatic Control, Lund Institute of Technology, Sweden, August 2001.
9.
Tummescheit H., Design and Implementation of Object-Oriented Model Libraries using Modelica. PhD thesis, Department of Automatic Control, Lund Institute of Technology, Sweden, August 2002.
10.
VDI-Warmeatlas, Berechnungsblatter fur den Warmeubergang, VDI-Verlag, 1998.
11.
Qiu
L.
,
Lee
T. H.
,
Liu
L.-M.
,
Yang
Y. L.
,
Jacobson
A.
,
Oxygen permeation studies of SrCo0.8Fe0.2O3-d
,
Solid state Ionics
, Vol.
76
, pp.
321
329
,
1995
12.
Selimovic F., Modeling of Transport Phenomena in Monolithic Structures Related to CO2-Free Power Processes. Licentiate Thesis, Department of Energy Sciences, Lund Institute of Technology, Sweden, 2005.
This content is only available via PDF.
You do not currently have access to this content.