Ion transport membrane technology for oxygen separation and syngas production

Dyer, Paul N.

doi:10.1016/s0167-2738(00)00710-4

Cited by 531 publications

(254 citation statements)

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“…Therefore, oxy-fuel combustion, an important technology in power generation with carbon capture, can be performed in an ITM reactor without the need for extra purification for the exhaust stream. In another application, partial oxidation using the oxygen produced by the membrane can be used to reform a fuel to a synthesis gas composed of carbon monoxide and hydrogen [22][23][24][25][26]. As oxygen is introduced uniformly into the permeate side where partial oxidation takes place, ITM reactors achieve a higher carbon monoxide selectivity than typical reactors (e.g., co-fed, fixed bed reactors).…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of ion transport membrane reactors: Oxygen permeation and transport and fuel conversion

Hong

Kirchen

Ghoniem

2012

Journal of Membrane Science

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Ion transport membrane (ITM) based reactors have been suggested as a novel technology for several applications including fuel reforming and oxy-fuel combustion, which integrates air separation and fuel conversion while reducing complexity and the associated energy penalty. To utilize this technology more effectively, it is necessary to develop a better understanding of the fundamental processes of oxygen transport and fuel conversion in the immediate vicinity of the membrane. In this paper, a numerical model that spatially resolves the gas flow, transport and reactions is presented. The model incorporates detailed gas phase chemistry and transport. The model is used to express the oxygen permeation flux in terms of the oxygen concentrations at the membrane surface given data on the bulk concentration, which is necessary for cases when mass transfer limitations on the permeate side are important and for reactive flow modeling. The simulation results show the dependence of oxygen transport and fuel conversion on the geometry and flow parameters including the membrane temperature, feed and sweep gas flow, oxygen concentration in the feed and fuel concentration in the sweep gas.

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Section: Introductionmentioning

confidence: 99%

Numerical simulation of ion transport membrane reactors: Oxygen permeation and transport and fuel conversion

Hong

Kirchen

Ghoniem

2012

Journal of Membrane Science

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“…In recent years, such perovskite-type oxides with mixed ionic and electronic conductivities have attracted great interest, since they have large potential applications not only in the separation of oxygen from air [6 -9] but also in the chemical process [10 -18]. So far, most studies focused on the optimization of the oxygen fluxes, e.g., tube-type membranes [19] and thin layer supported membranes [20]. However, there are only a few studies on the thermal expansion coefficient (TEC) and the phase stability of mixed ionic and electronic perovskites at high temperatures which could drastically affect their commercial applications.…”

Section: Introductionmentioning

confidence: 99%

In situ high temperature X-ray diffraction studies of mixed ionic and electronic conducting perovskite-type membranes

et al. 2005

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“…Dense mixed-conducting ceramic membranes are of significant interest due to their potential applications for high-purity oxygen separation, partial oxidation of hydrocarbons, and sensors [1][2][3][4][5][6][7][8]. The main advantages of such membranes include an infinite theoretical permselectivity with respect to oxygen, and an ability to integrate oxygen separation, steam reforming and partial oxidation into one single step for the natural gas conversion.…”

Section: Introductionmentioning

confidence: 99%

Oxygen transport in Ce0.8Gd0.2O2−-based composite membranes

et al. 2003

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Gadolinia-doped ceria electrolyte Ce 0.8 Gd 0.2 O 2 À d (CGO) and perovskite-type mixed conductor La 0.8 Sr 0.2 Fe 0.8 Co 0.2 O 3 À d (LSFC), having compatible thermal expansion coefficients (TECs), were combined in dual-phase ceramic membranes for oxygen separation. Oxygen permeability of both LSFC and composite LSFC/CGO membranes at 970 -1220 K was found to be limited by the bulk ambipolar conductivity. LSFC exhibits a relatively low ionic conductivity and high activation energy for ionic transport ( f 200 kJ/mol) in comparison with doped ceria. As a result, oxygen permeation through LSFC/CGO composite membranes, containing similar volume fractions of the phases, is determined by the ionic transport in CGO. The permeation fluxes through LSFC/CGO and La 0.7 Sr 0.3 MnO 3 À d /Ce 0.8 Gd 0.2 O 2 À d (LSM/CGO) composites have comparable values. An increase in the p-type electronic conductivity of ceria in oxidizing conditions, which can be achieved by co-doping with variable-valence metal cations, such as Pr, leads to a greater permeability. The oxygen ionic conductivity of the composites consisting of CGO and perovskite oxides depends strongly of processing conditions, decreasing with interdiffusion of the phase components, particularly lanthanum and strontium cations from the perovskite into the CGO phase. D

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Ion transport membrane technology for oxygen separation and syngas production

Cited by 531 publications

References 1 publication

Numerical simulation of ion transport membrane reactors: Oxygen permeation and transport and fuel conversion

Numerical simulation of ion transport membrane reactors: Oxygen permeation and transport and fuel conversion

In situ high temperature X-ray diffraction studies of mixed ionic and electronic conducting perovskite-type membranes

Oxygen transport in Ce0.8Gd0.2O2−-based composite membranes

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