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- W3160742014 abstract "In this study, hierarchical 10 and 20%CeO2–Al2O3 nanocomposites with 10 and 20% ceria content as well as pure γ-Al2O3 were synthesized via template-free modified co-precipitation method. The as-synthesized nanocomposites were characterized using several techniques such as BET, XRD, TEM, TGA-DTA, XPS, FE-SEM and AFM. The synthesized nanocomposites were loaded by 5% NiO via ultrasonic assisted route and successfully investigated for cyclohexane dehydrogenation in a catalytic flow system. The XRD results ensured the formation of crystalline cubic γ-alumina and cubic CeO2 with fluorite structure. Additionally, a solid-solution has been formed in all CeO2–Al2O3 nanocomposites with retaining the ceria fluorite structure. Moreover, a large fraction of dispersed CeO2 phase over the nanocomposites surface accompanied by CeAlO3 cubic phase was observed. TEM, AFM and FE-SEM technique emphasized the development of totally novel 3-dimensional hierarchical pyramidal structure nanocomposites which newly synthesized with a facile preparation procedure. Finally, the synthesized nano-composites achieved high benzene yield of 98.9 and 99%, at LHSV of 1 h−1 whereas, 100% selectivity was achieved at LHSV of 3 h−1 towards benzene production up to 350 °C of reaction temperature. At higher reaction temperature, a considerable amount of methane is clearly detected in the product gas suggesting the occurrence of cyclohexane hydrogenolysis. The obtained catalytic performance was attributed to the proposed experimental conditions, the high surface area of the synthesized hierarchical structure and the optimized ceria loading to the alumina ratios." @default.
- W3160742014 created "2021-05-24" @default.
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- W3160742014 date "2021-08-01" @default.
- W3160742014 modified "2023-09-27" @default.
- W3160742014 title "A facile synthesis of 3D pyramidal hierarchical CeO2–Al2O3 nanocomposites supported nickel catalyst for cyclohexane dehydrogenation" @default.
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- W3160742014 doi "https://doi.org/10.1016/j.micromeso.2021.111151" @default.
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