تولید زیست‌گازوییل توسط نانوذرات کلسیم بر پایه تالک: اثر دمای کلسیناسیون و مطالعه سینتیکی

نویسنده

گروه ترموسنتیک و کاتالیست، دانشکده مهندسی شیمی و نفت، دانشگاه صنعتی شریف، تهران

چکیده

در این تحقیق یک مخلوط نانوساختار فلزی CaO/talc با روش ساده تلقیح مرطوب سنتز شد. نانوکاتالیست تهیه‌شده در واکنش تبادل استری شدن روغن کانولا و متانول برای تولید زیست‌گازوییل استفاده شد. تأثیر دمای کلسیناسیون و دمای واکنش روی فعالیت کاتالیست در واکنش بررسی شد. همچنین سرعت واکنش با یک مدل سینتیکی مطالعه گردید و پارامترهای سینتیکی محاسبه شد. مشخصه‌های سطحی و ساختاری کاتالیست با استفاده از طیف‌سنج پراش اشعه ایکس XRD، آنالیز توزین حرارتی/مشتق توزین حرارتی TG/DTG و مطالعات مساحت برونر، امت، تلر BET بررسی گردید. این مطالعات نشان داد که عملکرد بهینه نانوکاتالیست در اثر تولید مراکز فعال در سطح کاتالیست و بهبود ساختار آن می‌باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Biodiesel Synthesis over CaO/talc Nanopowders: Effect of Calcination Temperature and Kinetic Study

نویسنده [English]

  • M. Kazemeini
چکیده [English]

A solid CaO/talc mixed oxide catalyst was prepared using simple wet impregnation method. The prepared nanocatalyst was used in the transesterification reaction of canola oil and methanol for biodiesel synthesis. The effects of calcination temperature and reaction temperature were investigated on the activity of the catalyst. In addition, rate of the reaction has been studied by a kinetic model, and the kinetic parameters were determined. Surface properties and structure of the catalyst were characterized with powder X-ray diffraction XRD, thermogravimetry /derivative thermogravimetry TG/DTG, and Brunauer–Emmett–Teller BET, indicating that the performance of the nanocatalyst corresponded to the generation of active sites and thermal activation.

کلیدواژه‌ها [English]

  • Transesterification
  • Biodiesel
  • Calcination Temperature
  • Heterogeneous nano catalyst
  • Kinetic study
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