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• W2079804200 abstract "Abstract Varying the composition of Sr–Al oxides, mixed as well as single phase compounds were prepared and characterized extensively by XRD, NMR, TEM, EPR, XPS, and TPD. Depending on synthesis method and precursors, Sr/Al-based materials with different crystalline phases (e.g., Sr 3 Al 4 O 9 ·2H 2 O, double perovskite, SrAl 4 O 7 , SrAl 2 O 4 , and SrCO 3 ) were obtained. Apart from these crystalline phases, several other species were present, as identified by solid state NMR and TG–MS. The ratio of tetrahedrally to octahedrally coordinated Al (Al IV /Al VI ) in the Sr/Al mixed oxides increased from 0.5 (pure alumina) to 5.2 in Sr/Al = 1.25, as determined by solid state NMR. The performance of these catalysts in the oxidative coupling of methane depended on the Al IV /Al VI ratio, both activity as well as C 2+ selectivity increased with increasing Sr-content. The catalyst with a Sr/Al ratio of 1.25 showed a performance comparable to the well-known catalyst 1.9%Mn–4%Na 2 WO 4 /SiO 2 under the conditions used (810 °C, CH 4 :O 2  = 108:22, GHSV ∼ 26,000 L/kg cat  h)." @default.
• W2079804200 created "2016-06-24" @default.
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• W2079804200 date "2011-07-01" @default.
• W2079804200 modified "2023-10-18" @default.
• W2079804200 title "SrO·Al2O3 mixed oxides: A promising class of catalysts for oxidative coupling of methane" @default.
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• W2079804200 doi "https://doi.org/10.1016/j.jcat.2011.05.005" @default.
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