Oxygen permeation versus catalytic properties of bismuth-based oxide ion conductors used for propene oxidation in a catalytic dense membrane reactor

Löfberg, Axel; Boujmiai, S; Capoen, Edouard; Steil, M.C.; Pirovano, Caroline; Vannier, Rose‐Noëlle; Mairesse, G.; Bordes‐Richard, Elisabeth

doi:10.1016/j.cattod.2004.03.013

Cited by 38 publications

(48 citation statements)

References 14 publications

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“…Because of their conductivity at moderate temperatures, 400-700°C, these materials could be developed as membranes for oxygen separation from air [7,8] or as catalysts in a Catalytic Dense Membrane Reactor (CDMR) [9]. There are two concepts of oxygen separators using an oxide ion conductive membrane: current driven membranes and pressure driven membranes.…”

Section: Oxygen Permeation In Bismuth-based Materials Part Imentioning

confidence: 99%

Oxygen permeation in bismuth-based materials. Part I: Sintering and oxygen permeation fluxes

et al. 2006

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Oxygen permeation measurements were performed on two layered bismuth based oxide ceramics: a rhombohedral phase belonging to the Bi 2 O 3 -CaO system, (Bi 2 O 3 ) 0.73 -(CaO) 0.27 (BICAO) and a BICOVOX phase. Oxygen permeability for these systems was compared to permeability of the cubic fluorite type structure with composition (Bi 2 O 3 ) 0.75 (Er 2 O 3 ) 0.25 (BE25). Low oxygen permeability was observed for the pure ceramic.As for BE25, permeability was considerably increased if 40 vol% of silver was added to BICAO. In contrast, permeability was not improved by addition of gold to BICOVOX. For this latter phase, the oxygen molecular exchange at the surface is clearly the limiting step in the oxygen transfer.

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Section: Oxygen Permeation In Bismuth-based Materials Part Imentioning

confidence: 99%

Oxygen permeation in bismuth-based materials. Part I: Sintering and oxygen permeation fluxes

et al. 2006

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“…One of the most striking results is the formation of syngas, which was not observed in our former work concerning mirror-polished BICUVOX and BICOVOX membranes [34].…”

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confidence: 41%

“…Details of the assembly made up of the catalytic dense membrane reactor fed by mass flow controlled gases and on-line analysis of effluents using a mass spectrometer (Pfeiffer, Omnistar Prisma200) and/or oxygen gauge (Setnag, JC48V) may be found in [34]. The The polarization between the membrane surfaces was in situ determined by measuring the electric potential (Solid Electrolyte Potentiometry) [37] between two gold electrodes, a grid stuck on the HOP side as the counter electrode and a tip on the LOP side as the working electrode [34].…”

Section: Catalytic Dense Membrane Reactor (Cdmr)mentioning

confidence: 99%

“…The The polarization between the membrane surfaces was in situ determined by measuring the electric potential (Solid Electrolyte Potentiometry) [37] between two gold electrodes, a grid stuck on the HOP side as the counter electrode and a tip on the LOP side as the working electrode [34].…”

Section: Catalytic Dense Membrane Reactor (Cdmr)mentioning

confidence: 99%

“…In the temperature range 600-680°C, it amounts to 3. were performed with a mirror-polished erbium-doped bismuth oxide to which 40% silver was added (cermet) [34,38]. The oxygen flux was far higher (at 600-680°C, JO 2 = 0.063-0.025…”

Section: Catalytic Properties Of Mirror-polished Bicuvox and Bicovox mentioning

confidence: 99%

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Catalytic dense membranes of doped Bi4V2O11 (BIMEVOX) for selective partial oxidation: chemistry of defects versus catalysis

et al. 2006

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A catalytic dense membrane reactor (CDMR) is used to physically separate the reaction step from the reoxidation of the catalyst. By decoupling the redox mechanism prevailing in mild oxidation of hydrocarbons, the operating conditions may be optimized resulting in an increase of selectivity. The membranes are made up of BIMEVOX oxides, obtained by partial substitution of V in γ-Bi 4 V 2 O 11 by ME (Co, Cu, Ta). Experiments performed on BIMEVOX dense membranes using propene and propane are described in terms of, (i) active sites on polished or unpolished surfaces, (ii) operating conditions (T, pO 2 in the high oxygen partial pressure compartment), which determine the selectivity, either to mild oxidation products (acrolein, hexadiene, CO), or to partial oxidation products (CO, H 2 ), and, (iii) nature of ME cations and relative properties. The discussion deals with the respective role of electronic vs.oxide ion conductivities which depend on defects in the structure as well as on the redox properties of cations.KEY WORDS: catalytic dense membrane reactor; syngas; mild oxidation of propene; partial oxidation of propane; oxide ion conductivity; electronic conductivity.3

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Oxygen Diffusion Mechanisms in Two Series of Oxide Ion Conductors: BIMEVOX and Brownmillerite Materials

Rolle

Roussel

Kongmark

et al. 2009

Advances in Solid Oxide Fuel Cells III

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Oxygen permeation versus catalytic properties of bismuth-based oxide ion conductors used for propene oxidation in a catalytic dense membrane reactor

Cited by 38 publications

References 14 publications

Oxygen permeation in bismuth-based materials. Part I: Sintering and oxygen permeation fluxes

Oxygen permeation in bismuth-based materials. Part I: Sintering and oxygen permeation fluxes

Catalytic dense membranes of doped Bi4V2O11 (BIMEVOX) for selective partial oxidation: chemistry of defects versus catalysis

Oxygen Diffusion Mechanisms in Two Series of Oxide Ion Conductors: BIMEVOX and Brownmillerite Materials

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