Institutional Repository
Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/C9815D25-80C8-435D-A017-A90D7864616E | ||
| Year | 1996 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
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| Bibliographic Citation | M. Makri, Y. Jiang, I. V. Yentekakis and C. G. Vayenas, "Oxidative coupling of methane to ethylene with 85 yield in a gasrecycle electrocatalytic or catalytic reactor-separator", Studies Surf. Sci. Catal., vol. 101. pp. 387-396, 1996. doi:10.1016/S0167-2991(96)80249-7 https://doi.org/10.1016/S0167-2991(96)80249-7 | ||
| Appears in Collections |
Methane was oxidatively coupled to ethylene with very high yield in a novel gas recycle reactor-separator operated in a batch or continuous flow mode. The recycled gas passes continuously through a molecular sieve trap in the recycle loop which adsorbs and thus protects from further oxidation a controllable percentage of ethylene and ethane. The products are obtained by subsequent heating of the molecular sieve trap. Ethylene yield up to 85%, i.e. 88% selectivity to ethylene at 97% CH4 conversion, has been obtained in the batch mode of operation using a Ag-Sm2O3 or Ag electrocatalyst and electrochemical supply of oxygen through a ZrO2-Y2O3 solid electrolyte. Using the continuous flow mode of oprration with gaseous O2 supply in the recycle loop and a Sr(1wt%)/La2O3 catalyst we have obtained ethylene yields up to 50%, i.e. 65% C2H4 selectivity at 76% CH4 conversion. The synergy of the catalytic and molecular sieve materials is discussed and modelled in view of the predominantly consecutive nature of the oxidative coupling of methane (OCM) network.
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