کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6594405 | 1423663 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Comparative assessment of the ability of a microwave absorber nanocatalyst in the microwave-assisted biodiesel production process
ترجمه فارسی عنوان
ارزیابی مقایسه ای توانایی یک نانوکاتالیست جذب مایکروویو در فرآیند تولید بیودیزل با کمک مایکروویو
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کلمات کلیدی
سنتز احتراق کلسیم آلومینات، نانوکاتالیست کربناته، اشعه مایکروویو، بیودیزل، روغن کانولا،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
In this study, a carbon-supported KOH/Ca12Al14O33 nanocomposite was fabricated via the microwave combustion method, in which dextrose was used as a carbon source, and its activity in the microwave-assisted transesterification reaction as a microwave absorption material was assessed. The samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetry, Brunauer-Emmett-Teller (BET), field-emission scanning electron microscopy, and energy dispersive X-ray analyses. The results showed that the carbonate and noncarbonate samples had a calcium aluminate (Ca12Al14O33) structure as a support. Different carbon groups were formed during preparation of the carbon-supported KOH/Ca12Al14O33 nanocomposite, which improved its surface area and porosity. Although the samples presented similar basicity, the carbonated nanocomposite exhibited twice as much activity as the KOH/Ca12Al14O33 nanocatalyst for conversion of canola oil to biodiesel in the microwave-assisted transesterification reaction at 270 W microwave power. The nanocomposite with a larger pore size made active sites easily accessible and exhibited higher catalytic ability where the conversion of 98.8% was obtained under the optimized conditions of 270 W microwave power, methanol/oil molar ratio of 15, 4 wt% of the nanocomposite, and 30 min of reaction time. The carbon-supported nanocatalyst can be reused for at least four times with less reduction in activity. Furthermore, the obtained biodiesel showed that it met the standard values (EN 14214 and ASTM D-6751) with respect to the density, kinematic viscosity at 40 °C, acid number, and flash point.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comptes Rendus Chimie - Volume 21, Issue 7, July 2018, Pages 676-683
Journal: Comptes Rendus Chimie - Volume 21, Issue 7, July 2018, Pages 676-683
نویسندگان
Hamed Nayebzadeh, Naser Saghatoleslami, Mohammad Haghighi, Mohammad Tabasizadeh, Ehsan Binaeian,