کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
64625 48363 2016 5 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
Well-defined dendrimer encapsulated ruthenium SCILL catalysts for partial hydrogenation of toluene in liquid-phase
ترجمه فارسی عنوان
کاتالیزورهای روتنیم SCILL که به طور کامل تعریف شده از دندریمر برای هیدروژنه شدن جزئی از تولوئن در فاز مایع
کلمات کلیدی
روتنیم؛ قالب دندریمر؛ هیدروژناسیون انتخابی کاتالیزور SCILL؛ مایع یونی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• Well-defined Ru nanoparticles with narrow size distribution have been synthesized, characterized and supported onto silica gel as catalysts for hydrogenation reactions.
• Dendrimer derived catalysts alone exhibited high activity and better selectivity in toluene hydrogenation compared to commercially available catalyst.
• Selectivity toward partially hydrogenated intermediate could be increased by thin film coating with ionic liquids.
• Beneficial effect of ionic liquid could not be pinpointed to one characteristic feature, thereby indicating a complex interplay between ionic liquid, metal and substrate/intermediate.

Dendrimer encapsulated ruthenium nanoparticles (RuDEN) were prepared and immobilized on silica 60 and silica 100. The size of the supported RuDENs was investigated using HRTEM and the generation six G6-RuDEN was found to be the most stable RuDEN upon immobilization. The catalysts were evaluated in the liquid-phase hydrogenation of toluene at a hydrogen pressure of 30 bar and 110 °C. Several ionic liquids were used as coatings for the G5-RuSil100 catalysts to give various Solid Catalysts with Ionic Liquid Layer (SCILL). In each case the selectivity towards methylcyclohexenes was increased compared to the uncoated catalyst, accompanied by an expected decrease in activity with the highest methylcyclohexene selectivity being observed when using [EMIM][NTf2] as a coating.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 421, September 2016, Pages 156–160
نویسندگان
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