ارزیابی دو کاتالیست گل قرمز و اسپینل Mg-Fe در تبدیل اسید چرب آزاد به بیودیزل

مهندسی متالورژی و مواد

مقاله 2، دوره 36، شماره 2 - شماره پیاپی 38، خرداد 1404، صفحه 17-30   

نوع مقاله: علمی و پژوهشی

شناسه دیجیتال (DOI): 10.22067/jmme.2025.92609.1197

نویسندگان

الهه کوثری پور؛ بهگام رحمانی وحید^* ؛ حامد نایب زاده

دانشکده مهندسی شیمی و مواد، مجتمع آموزش عالی اسفراین، اسفراین، خراسان شمالی، ایران.

چکیده

در مقاله حاضر اسپینل MgFe2O4 سنتز شده به روش احتراقی با سوخت گلایسین و گل قرمز گرفته شده از کارخانه آلومینای جاجرم به عنوان دو کاتالیست بر مبنای Fe، در فرایند استریفیکاسیون جهت تولید بیودیزل مورد ارزیابی قرار گرفتند. جهت بررسی مشخصات فیزیکی، شیمیایی و ساختاری، برای هر دو نمونه از آنالیزهای XRD، FTIR، BET و FESEM استفاده شد و سپس هر دو نمونه بعنوان کاتالیست در واکنش استریفیکاسیون مورد استفاده قرار گرفتند. نتایج حاصل از آنالیز‌های انجام گرفته و همچنین تست راکتوری نشان داد که نانو کاتالیست سنتز شده به روش احتراقی با سوخت گلایسین، به لحاظ مشخصات فیزیکی-شیمیایی-ساختاری و هم‌چنین عملکرد کاتالیستی در واکنش تولید بیودیزل بسیار مطلوب می‌باشد به طوری که در شرایط یکسان واکنش، مقدار تبدیل کاتالیست اسپینلی برابر 6/84 درصد است، در حالی که در همین شرایط مقدار تبدیل برای گل قرمز 7/62% می باشد. به این ترتیب کاتالیست های گل قرمز و اسپینل منیزیم فریت سنتز شده به روش احتراقی با سوخت گلایسین، با یکدیگر در دایره رقابت قرار گرفتند که در این بررسی کاتالیست اسپینلی Mg-Fe بسیار موثرتر عمل کرد و نتایج بهتری نسبت به کاتالیست‌ گل قرمز برای واکنش استریفیکاسیون اسیداولئیک ارائه نمود. نتایج حاصل نشان داد که با وجود ارزان تر بودن کاتالیست گل قرمز (ضایعات فرایند تولید آلومینیوم)، درصد تبدیل اسپینل MgFe2O4 برای واکنش تولید سوخت ارزشمند بیودیزل بالاتر می باشد ولی به نظر میرسد برای مقایسه اقتصادی این دو کاتالیست نیاز به پژوهش های بیشتری باشد.

کلیدواژه‌ها

کاتالیست نانو ساختار؛ بیودیزل؛ گل قرمز؛ واکنش استریفیکاسیون؛ اسپینل MgFe2O4؛ سنتز احتراقی

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