شیمى کاربردى روز

شیمى کاربردى روز

کانمیت تهیه شده از خاکستر پوسته برنج به عنوان یک کاتالیزور بازی موثر، ارزان قیمت و قابل بازیافت برای تولید بیودیزل

نوع مقاله : مقاله علمی پژوهشی

نویسندگان
1 دانشکده شیمی، دانشگاه سمنان
2 دانشکده شیمی، دانشگاه سمنان، سمنان، ایران
چکیده
در این پژوهش، کانمیت از خاکستر پوسته برنج تهیه شده، و به عنوان یک کاتالیزور ناهمگن بازی برای تولید بیودیزل از روغن آفتابگردان استفاده شد. خصوصیات کاتالیزور با استفاده از تکنیک‌های PXRD، FESEM و FT-IR شناسایی گردید. پارامترهای موثر در واکنش ترانس استریفیکاسیون برای تولید بیودیزل از قبیل مقدار کاتالیزور، نسبت مولی متانول به روغن، زمان واکنش و دمای واکنش بهینه شد. تحت شرایط بهینه (% 5 وزنی کاتالیزور، نسبت مولی متانول: روغن 1:24، زمان واکنش 4 ساعت و دمای C° 65 ) درصد تبدیل به 2/97 رسید. همچنین کاتالیزور 5 بار بدون کاهش قابل توجه در درصد تبدیل، قابلیت بازیابی و استفاده مجدد را دارد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Kanemite from rice husk ash as an efficient, cheap and recoverable base catalyst for production of biodiesel

نویسندگان English

Abolfazl Ghaffari Nazifi 1
Mahdi Behzad 2
1 department of chemistry,Semnan University
2 Department of chemistry, Semnan University, Semnan, Iran
چکیده English

In this work, Kanemite was prepared from rice husk ash and used as a heterogeneous base catalyst for production of biodiesel from sunflower oil. The catalyst was characterized by PXRD, FESEM and FT-IR. The transesterification conditions, such as the catalyst dosage, molar ratio of methanol to oil, reaction temperature and reaction time were investigated and optimized. The results revealed that by a catalyst loading of 5 wt. %, methanol to oil ratio of 24:1, reaction temperature of 65 °C and reaction time of 4h, conversion of biodiesel reached 97.2%. Moreover, the catalyst could be reused up to five cycles under the optimum reaction conditions without significant loss of product yield.

کلیدواژه‌ها English

Biodiesel
transesterification
Rice husk ash
Kanemite
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