Separation of gases with solid electrolyte ionic conductors

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The authors have developed a novel method of gas separation based on electrolyte ionic membrane technology. Separation of one gas from another occurs through an ion-conducting membrane by the passage of selected ions. Most systems studied have focused on oxygen ion conduction for the separation of oxygen from air, although protonic and halide-conducting solid materials also exist. As an example of this system, this paper concentrates on a study of a membrane reactor used in the production of syngas (CO + H{sub 2}) from methane. The membrane material is a modified perovskite-type oxide exhibiting mixed (electronic/ionic) conductivity. Mixed-conductivity oxides are ... continued below

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6 p.

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Balachandran, U.; Dusek, J.T.; Maiya, P.S.; Mieville, R.L.; Ma, B.; Kleefisch, M.S. et al. November 1, 1996.

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Description

The authors have developed a novel method of gas separation based on electrolyte ionic membrane technology. Separation of one gas from another occurs through an ion-conducting membrane by the passage of selected ions. Most systems studied have focused on oxygen ion conduction for the separation of oxygen from air, although protonic and halide-conducting solid materials also exist. As an example of this system, this paper concentrates on a study of a membrane reactor used in the production of syngas (CO + H{sub 2}) from methane. The membrane material is a modified perovskite-type oxide exhibiting mixed (electronic/ionic) conductivity. Mixed-conductivity oxides are promising materials for oxygen-permeating membranes that can operate without electrodes or external electrical circuitry. Extruded tubes of this material have been evaluated in a reactor operating at {approx} 850 C for partial oxidation of methane into syngas in the presence of a reforming catalyst. Separated oxygen on one side of the reactor wall was obtained from air on the other side. Methane conversion efficiencies of > 99% were observed, and some of the reactor tubes have been operated for > 1,000 h. Membrane tubes were fabricated from calcined powders by a plastic extrusion technique. Characterization of the mechanical, physical, and chemical properties of this material confirmed the stability exhibited in the reactor.

Physical Description

6 p.

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OSTI as DE97003770

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  • 11. intersociety cryogenic symposium, Houston, TX (United States), 28-30 Jan 1997

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  • Other: DE97003770
  • Report No.: ANL/ET/CP--91779
  • Report No.: CONF-970163--1
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/459338 | External Link
  • Office of Scientific & Technical Information Report Number: 459338
  • Archival Resource Key: ark:/67531/metadc674904

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  • November 1, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • Dec. 16, 2015, 3:52 p.m.

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Balachandran, U.; Dusek, J.T.; Maiya, P.S.; Mieville, R.L.; Ma, B.; Kleefisch, M.S. et al. Separation of gases with solid electrolyte ionic conductors, report, November 1, 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc674904/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.