Development of mixed-conducting ceramic membranes for converting methane to syngas

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The abundantly available natural gas (mostly methane) discovered in remote areas has stimulated considerable research on upgrading this gas to high-value-added clean-burning fuels such as dimethyl ether and alcohols and to pollution-fighting additives. Of the two routes to convert methane to valuable products direct and indirect, the direct route involving partial oxidation of methane to syngas (CO + H{sub 2}) by air is preferred. Syngas is the key intermediate product used to form a variety of petrochemicals and transportation fuels. This paper is concerned with the selective transport of oxygen from air for converting methane to syngas by means of ... continued below

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14 p.

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Balachandran, U.; Maiya, P.S.; Ma, B.; Dusek, J.T.; Mieville, R.L. & Picciolo, J.J. April 1, 1997.

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Description

The abundantly available natural gas (mostly methane) discovered in remote areas has stimulated considerable research on upgrading this gas to high-value-added clean-burning fuels such as dimethyl ether and alcohols and to pollution-fighting additives. Of the two routes to convert methane to valuable products direct and indirect, the direct route involving partial oxidation of methane to syngas (CO + H{sub 2}) by air is preferred. Syngas is the key intermediate product used to form a variety of petrochemicals and transportation fuels. This paper is concerned with the selective transport of oxygen from air for converting methane to syngas by means of a mixed-conducting ceramic oxide membrane prepared from Sr-Fe-Co-O oxide. While both perovskite and nonperovskite type Sr-Fe-Co-O oxides permeate large amounts of oxygen when the membrane tube is subjected to oxygen pressure gradients, the work shows that the nonperovskite SrFeCo{sub 0.5}O{sub x} exhibits remarkable stability during oxygen permeation. More particularly, extruded and sintered tubes from SrFeCo{sub 0.5}O{sub x} have been evaluated in a reactor operating at {approx} 850 C for conversion of methane into syngas in the presence of a reforming catalyst. Methane conversion efficiencies of {approx} 99% were observed. In addition, oxygen permeability of SrFeCo{sub 0.5}O{sub x} was measured as a function of oxygen partial pressure gradient and temperature in a gas-tight electrochemical cell. Oxygen permeability has also been calculated from conductivity data and the results are compared and discussed.

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14 p.

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OSTI as DE97053362

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  • ESF network on catalytic membrane reactors, Oslo (Norway), 30 May - 1 Jun 1997

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  • Other: DE97053362
  • Report No.: ANL/ET/CP--93360
  • Report No.: CONF-9705250--
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/671894 | External Link
  • Office of Scientific & Technical Information Report Number: 671894
  • Archival Resource Key: ark:/67531/metadc702202

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Creation Date

  • April 1, 1997

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 17, 2015, 5:59 p.m.

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Balachandran, U.; Maiya, P.S.; Ma, B.; Dusek, J.T.; Mieville, R.L. & Picciolo, J.J. Development of mixed-conducting ceramic membranes for converting methane to syngas, report, April 1, 1997; United States. (digital.library.unt.edu/ark:/67531/metadc702202/: accessed July 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.