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• W1966229042 abstract "Vanadia-based catalysts were prepared using the sol-gel method and were subjected to the oxidative dehydrogenation of isobutane with CO 2 . The materials were extensively characterized by using X-ray diffraction, N 2 adsorption-desorption, O 2 -temperature programmed oxidation, temperature programmed surface reaction, and in situ Fourier transform infrared techniques. Catalytic results indicate that a high selectivity toward total C 4 olefins over 85% was obtained over all of the catalysts. On the contrary, the highest conversion of isobutane was observed over 12 wt% V 2 O 5 /Ce 0.6 Zr 0.4 O 2 (7 wt%)-Al 2 O 3 , and a more stable performance was achieved over 6 wt% V 2 O 5 -Ce 0.6 Zr 0.4 O 2 (7 wt%)-Al 2 O 3 . The catalytic activity for the titled reaction was found to be dependent on the dispersion and crystallinity of the VO x species over the catalyst, and the deposition of the heavier coke over the catalyst was revealed to be the main reason for the catalyst deactivation. Moreover, the benefit of CO 2 toward the titled reaction was clearly revealed from TPSR results, and the reaction was confirmed to follow the redox mechanism. The oxidative hydrogenation of isobutane with CO 2 over vanadia-based catalysts was confirmed to follow the redox mechanism, and the catalyst deactivation was mainly originated from the deposition of heavier coke." @default.
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• W1966229042 date "2014-08-01" @default.
• W1966229042 modified "2023-09-27" @default.
• W1966229042 title "Insights into the vanadia catalyzed oxidative dehydrogenation of isobutane with CO2" @default.
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• W1966229042 doi "https://doi.org/10.1016/s1872-2067(14)60180-7" @default.
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