Transesterification of waste edible oils to biodiesel using calcium oxide@magnesium oxide nanocatalyst. (15th March 2020)

• Record Type: Journal Article
• Authors: Foroutan, Rauf; Mohammadi, Reza; Esmaeili, Hossein; Mirzaee Bektashi, Fatemeh; Tamjidi, Sajad
• Is Part Of: Waste management. Volume 105(2020)
• Page Start: 373
• Page End: 383
• Publication Date: 2020-03-15
• Subjects: Biodiesel -- CaO@MgO nanocatalyst -- Waste edible oil -- Waste chicken eggshell -- Optimization -- Calcination; Hazardous wastes -- Periodicals; Refuse and refuse disposal -- Periodicals; 363.728
• DOI: 10.1016/j.wasman.2020.02.032
• Languages: English
• ISSNs: 0956-053X

Abstract

Graphical abstract: Highlights: Waste edible oil was used to produce biodiesel in the presence of CaO@MgO nanocatalyst. FTIR, XRD, SEM, EDX/Map, and TEM analyses were used to characterize the CaO@MgO. The catalyst was successfully reused for up to 6 cycles. The maximum biodiesel conversion yield was obtained 98.37%. Abstract: In the present research, application of waste edible oil (WEO) as a suitable and abundant source for biodiesel production using CaO@MgO nanocatalyst derived from waste chicken eggshells was studied. To this end, FT-IR, XRD, SEM, EDX, Map, and TEM analyses were performed to investigate characteristics of the CaO@MgO nanocatalyst. Also, the physical properties of the biodiesel such as flash point, kinematic viscosity, density, distillation point, cloud point, pour point, cetane number, oxidation stability, and acid number were determined according to the international standards. In addition, FT-IR and HNMR analyses were used to determine the biodiesel characteristics. Moreover, the produced catalyst was successively reused for up to 6 cycles and the results showed that the catalytic activity of the catalyst produced was sufficient for biodiesel production from WEO for up to three cycles, beyond which its catalytic activity decreased. The present work further considered the effects of different parameters on biodiesel production using central composite design to determine optimal conditions. According to the results, the highest biodiesel conversion yield (98.37%) was achieved in a reaction time of 7.08 h, reaction temperature of 69.37 °C, methanol-to-oil ratio of 16.7:1, and catalyst concentration of 4.571 wt% which shows the highest biodiesel conversion yield ever achieved from waste edible oil.