A Two-step Catalytic Production of Biodiesel from Waste Cooking Oil

سال انتشار: 1392
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 837

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شناسه ملی سند علمی:

JR_IJE-26-6_002

تاریخ نمایه سازی: 17 خرداد 1393

چکیده مقاله:

Waste cooking oil (WCO) was used as a potential feedstock for biodiesel production. High level of free fatty acids (9.85% w/w) in WCO makes it an undesirable substrate for direct transesterificationreaction. To solve this issue, a two-step process was implemented in this research. Firstly, esterificationreaction was performed in the presence of sulfuric acid as a common acid catalyst to reduce the amount of free fatty acids (FFA) to less than 1.5% w/w. The triglycerides (TGs) in WCO were transesterified with methanol catalyzed by potassium hydroxide in the second step of reaction. Several effectiveparameters were evaluated in terms of reaction temperature (323-363 K), reaction time (0.5-3 h) and catalyst concentration (0-5.52% w/w). The optimum reaction temperature, reaction time and catalyst concentration were 355 K, 3 h and 3.68~ 4% w/w, respectively. In fact, maximum FFA conversion of87 wt% was obtained. The biodiesel synthesis condition in the second stage of reaction was defined asthe reaction temperature (338 K), methanol/ WCO molar ratio (6:1), KOH concentration (1% w/w) and reaction time (90 min). Under the above conditions, maximum TG conversion of 96.66 wt% was obtained.

نویسندگان

m Hassani

Faculty of Chemical Engineering, Noushirvani University of Technology, ۴۷۱۴۸ Babol, Iran

g Amini

Faculty of Chemical Engineering, Noushirvani University of Technology, ۴۷۱۴۸ Babol, Iran

g.d najafpour

Faculty of Chemical Engineering, Noushirvani University of Technology, ۴۷۱۴۸ Babol, Iran

m rabiee

Faculty of Mechanical Engineering, Noushirvani University of Technology, ۴۷۱۴۸ Babol, Iran