Activation of methane using solid oxide membranes


Elshof, J.E. ten and Hassel, B.A. van and Bouwmeester, H.J.M. (1995) Activation of methane using solid oxide membranes. Catalysis Today, 25 (3-4). pp. 397-402. ISSN 0920-5861

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Abstract:Dense membranes of mixed-conducting perovskite-type oxides La0.6Sr0.4,CO0.8Fe0.2O3 and La0.8Ba0.2Co0.8Fe0.2O3 were used for methane coupling by application of pressure-driven O2 permeation. High operating temperatures, typically above 800°C, were needed to obtain reasonable oxygen fluxes. Conversions were small (1–3%). Both compositions showed comparable C2 selectivities at low methane partial pressures. At higher pressures the selectivity to C2 hydrocarbons for La0.6Sr0.4CO0.8Fe0.2O3 increased to 67%, whereas La0.8Ba0.2CO0.8Fe0.2O3 showed small C2 selectivities. Strong surface segregation of Sr and Ba was shown by SEM for both compositions.
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Copyright:© 1995 Elsevier Science
Science and Technology (TNW)
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