بهینه سازی فرآیندتولید سوخت بیودیزل از روغن بازیافت سرخ کردنی در حضور کاتالیست پلی اکسومتالات به روش الکترولیز بر مبنای سطح پاسخ

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری شیمی کاربردی،گروه شیمی، واحد علوم تحقیقات تهران، دانشگاه آزاد اسلامی، تهران، ایران

2 استادیار فرآیندهای جداسازی و فراوری مواد، دانشکده مهندسی شیمی، نفت و گاز، دانشگاه علم و صنعت ایران، تهران، ایران

3 دانشیار شیمی تجزیه، گروه شیمی، واحد علوم تحقیقات تهران، دانشگاه آزاد اسلامی، تهران، ایران

4 گروه شیمی کاربردی، دانشکده شیمی ، واحد تهران شمال، دانشگاه ازاد اسلامی

5 استاد دانشکده مهندسی شیمی و نفت، دانشگاه صنعتی شریف، تهران، ایران

چکیده

امروزه با توجه به انتشارگازهای سمی و گلخانه­ای حاصل از احتراق سوخت­های فسیلی، دانشمندان به دنبال سوخت­های تجدیدپذیر و سازگار با محیط­زیست هستند. بیودیزل نوعی سوخت سبز است و این ویژگی­ها را دارد. در این مطالعه، فرایند تولید بیودیزل با استفاده از روغن بازیافت سرخ‌کردنی و کاتالیست اسیدی فسفومولیبدیک اسید (H3PMo12O40) انجام شد. به‌منظور بهینه‌سازی واکنش استریفیکاسیون از روش سطح پاسخ بر پایۀ طراحی مرکب (RSM-CCD)استفاده شد. اثر سه مؤلفۀ‌ مستقل درصد وزنی کاتالیست (wt%)، نسبت مولی الکل به روغن و زمان (h) بر روی بازده بیودیزل بررسی و تمامی مراحل آزمایش در ولتاژ ثابت الکتریکی V 10 و دمای اتاق انجام شد. بالاترین بازده بیودیزل در حضور wt% 58/3 کاتالیست هموژن اسیدی فسفومولیبدیک اسید، نسبت مولی الکل به روغن 1: 84/7 و مدت زمان 24/8 ساعت برابر با 74/94% بود. خواص فیزیکی و شیمیایی بیودیزل تولید شده مطابق با استاندارد ASTMاست. مقدار 9933/0=R2  نشان می­دهد که مدل پیش­بینی شده دارای دقت و صحت کافی برای تخمین مؤلفه‌های شرکت‌کننده در واکنش است. همچنین، فعالیت بالای کاتالیست فسفومولیبدیک اسید آن را گزینۀ مناسبی برای تولید بیودیزل در مقیاس صنعتی کرده است.

کلیدواژه‌ها


عنوان مقاله [English]

Optimization of Biodiesel Production from Waste Cooking Oil in Present of Polyoxometalate as Catalyst Via Electrolysis Method Based on Response Surface Methodology (RSM)

نویسندگان [English]

  • M. Helmi 1
  • A. Hemmati 2
  • P. Aberoomand Azar 3
  • K. Tahvildari 4
  • A. Safekordi 5
1 Science and Research Branch, Islamic Azad University
2 Iran University of Science and Technology
3 Science and Research Branch, Islamic Azad University
4 North Tehran Branch, Islamic Azad University
5 Sharif University of Technology
چکیده [English]

Today, due to emission of toxic and green gases from the combustion of fossil fuel, science look for renewable and eco-friendly fuels that biodiesel is kind of green fuel and has all properties. In these study, the biodiesel produced from waste cooking oil using phophomolybdic acid (H3PMo12O40). In order to optimize esterification reaction via electrolysis method response surface methodology based on central composite (RSM-CCD) was used. The effect of three main factors of catalyst weight (wt%), methanol to oil molar ratio and time (h) was investigated and all experimental runs were performed at constant electric voltage (10 V) and room temperature. The highest biodiesel yield in the present of 3.58 wt% catalyst, 7.84:1 at 8.24 h were 94.42%. the produced biodiesel in accordance with the ASTM standard. A value of R2=0.9933 indicates that the predicted model sufficient accuracy to estimate the parameters participating in the reaction. Also, the high activity of phosphomolybdic acid catalyst has made it a suitable option for biodiesel production on an industrial scale.

کلیدواژه‌ها [English]

  • Biodiesel
  • Phosphomolybdic Acid
  • Electrolysis method
  • Response surface methodology (RSM)

 

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