کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1504022 1510972 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of alkaline earth metals on the liquid-phase hydrogenation of hydroquinone over Ru-based catalysts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Effect of alkaline earth metals on the liquid-phase hydrogenation of hydroquinone over Ru-based catalysts
چکیده انگلیسی


• Sr promote dispersion of Ru.
• Sr modify the L/B acid.
• Catalyst's activity is good.

A series of Ru-based catalysts modified by alkaline earth metals were prepared by the impregnation-precipitation method and characterized using transmission electron microscopy, X-ray diffraction, ICP optical emission spectroscopy, Infrared Spectroscopy of adsorbed pyridine analysis and surface area analysis. The performance of the catalysts was measured via liquid-phase hydroquinone hydrogenation reaction. Results show that the Ru–Sr/NaY catalyst has the best activity and selectivity among those Ru-based catalysts. The conversion of hydroquinone and the selectivity to 1,4-cyclohexanediol reached up to 99.6% and 89.6% at optimum reaction condition (700 r/min, 423 K and 5 MPa pressure of H2 in 3 h). This may be attributed to the fact that the right amount of Strontium is beneficial to the good dispersion of the ruthenium nanoclusters on the surface of NaY and modify the acidic properties of the catalyst. Moreover, IR of adsorbed pyridine analysis suggested the proper ratio of L/B acid of the catalysts played an important role in the performance of the hydroquinone hydrogenation reaction.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Sciences - Volume 50, December 2015, Pages 85–90
نویسندگان
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