کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
63547 48223 2016 5 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
Catalytic performance of imidazolium based ILs in the reaction of 1,2-epoxyoctane and carbon dioxide: Kinetic study
ترجمه فارسی عنوان
عملکرد کاتالیزوری ILS بر پایه ایمیدازولیوم در واکنش 1،2-epoxyoctane و دی اکسید کربن: مطالعه جنبشی
کلمات کلیدی
واکنش حلقه‌زایی؛ کربنات حلقوی؛ CO2 فوق بحرانی؛ اپوکسید؛ مایعات یونی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• Kinetics of cycloaddition reaction catalyzed by ionic liquids evaluated.
• Potential of ionic liquids utilized under supercritical CO2.
• Catalytic activity enhances with increasing alkyl chain length of cation.
• Tetrafluoroborate anion has better catalytic activity compared to bromide anion.
• 1-hexyl-3-methylimidazolium tetrafluoroborate has lowest activation energy.

In the present study, the synthesis of cyclic carbonate by cycloaddition reaction of CO2 and epoxide catalyzed by imidazolium salts ionic liquids, was carried out under supercritical condition of CO2. In order to elucidate an effect of imidazolium based ILs on reaction kinetics, the cycloaddition reaction with various ILs of different cations and anions, ranging from C2 to C6 alkyl chain, and BF4− and Br−, respectively, were studied at various temperature (90–130 °C). Based on batch experiment results it was observed that the ILs with longer alkyl chain cation and BF4− anion, i.e., 1-hexyl-3-methylimidazolium tetrafluoroborate, showed a comparatively maximum catalytic activity. Furthermore, the pseudo first order reaction kinetics was observed predominant during cyclic carbonate synthesis under supercritical condition. The kinetic analysis of cycloaddition reaction, in the present study, confirms the maximum conversion efficiency and minimum activation energy (37 kJ/mol) was associated with HmimBF4 and therefore, renders HmimBF4 IL a potential catalyst for cyclic carbonate synthesis under supercritical condition.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of CO2 Utilization - Volume 14, June 2016, Pages 93–97
نویسندگان
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