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• W1908227482 abstract "Abstract A series of ternary mixed metal oxides containing Group III A elements (In, Ga, Al) is prepared by means of an alcoholic co‐precipitation method. Specifically, oxide catalysts with a molar composition of In/Ga/Al=5:15:80, 10:10:80, and 15:5:80 are reported. The chemical composition, redox properties, and catalyst structures are fully characterized, with the results suggesting that the indium, gallium, and aluminum moieties are well‐dispersed in the catalysts. The catalysts are evaluated for propane dehydrogenation (PDH) at 570 and 600 °C under 1 atm total pressure. The most effective catalyst with a composition of In/Ga/Al=5:15:80 provides 17 % conversion and approximately 86 % C 3 H 6 selectivity with an initial activity of 4.6 mmol h −1 g cat −1 and 24.1 μmol h −1 m −2 . The intrinsic activity on an active metal (i.e. indium and gallium) basis is approximately 3 times that of the In 2 O 3 –Ga 2 O 3 family and approximately 3–9 times that of the In 2 O 3 –Al 2 O 3 family. The catalyst deactivates with time on stream, and regeneration tests show that removal of surface coke and recovery of an In 2 O 3 state helps to regain the initial activity, whereas reducing In 2 O 3 domains into In 0 does not allow for recovery of the performance. Raman analysis of the carbonaceous species deposited on the catalyst indicates catalysts with higher gallium content give more graphitic carbon, which correlates with higher C 3 H 6 selectivity, whereas catalysts with more disordered coke are associated with lower selectivity. However, higher gallium content causes more coke formation, which leads to faster deactivation. This initial study of this family of mixed oxides suggests that an ideal In/Ga ratio may exist whereby catalyst properties may be optimized." @default.
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• W1908227482 date "2015-11-03" @default.
• W1908227482 modified "2023-09-23" @default.
• W1908227482 title "Propane Dehydrogenation over In₂O₃–Ga₂O₃–Al₂O₃ Mixed Oxides" @default.
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• W1908227482 doi "https://doi.org/10.1002/cctc.201500916" @default.
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