Preparation and Optimization of Biodiesel Production from Mixed Feedstock Oil

Abstract

In this paper, production of biodiesel from mixed feedstock oil (MFO) by three-step method and optimization of the process were studied by using regressive analysis. The random mixer of different oil was used for biodiesel preparation. The MFO contains 12 wt% free fatty acid (FFA) and its viscosity was 67.5 mm 2 /s. Because of higher FFA content transesterification method can't be applied, so three-step method was conducted for biodiesel preparation. In the three-step method, the first step was saponification of the oil followed by acidification to produce FFA and finally esterification of FFA to produce biodiesel. In the saponification reaction, various reaction parameters such as oil to sodium hydroxide molar ratio and reaction time were optimized. Produced sodium soap was acidified with excess molar ratio of HCl to produced FFA. In the esterification reaction, produced FFA was reacted with methanol in presence of acid catalyst and the FFA content was reduced to 0.98wt%. A factorial design was studied based on viscosity for esterification reaction and developed to obtain the higher yield of biodiesel. Finally various properties of biodiesel such as FFA content, viscosity, specific gravity, cetane index, pour point etc. were measured and compared with biodiesel and petro-diesel standard.

Synthesis of Solid Catalyst From Dolomite for Biodiesel Production Using Palm Kernel Oil in an Optimization Process by Definitive Screening Design

“…The optimization process of biodiesel production is through the application of experimental design tools to optimize the process parameters that could improve the biodiesel yield. There are several of these experimental design tools reported in the literature, particularly the traditional experimental designs (Ferdous et al, 2013;Gupta et al, 2016;Singh et al, 2006;Xuan et al, 2011). However, there is a paucity of information on the use of experimental design tools such as definitive screening design (DSD) and Mixture design for biodiesel production.…”

Potentiality of Biodiesel Production From Non-Edible Oil: Bangladesh Perspective

“…4.1.1 Base and acid catalyst transesterification method: Required amount of Chemicals for the production of 1.0 L of biodiesel yields 58% and 63.5% (wt/wt) for base and acid catalyst transesterification reported by Kaniz et al, (2011) [19] using NaOH as base catalyst and H 2 SO 4 as acid catalyst. Required amount of oil (Waste cook oil) for base and acid catalyst were 1645 mL and 1475 mL.…”

“…Required amount of Chemicals for the production of 1.0 L of biodiesel yield 79% (wt/wt) for three-step method reported by Kaniz et al, (2011) [19]. Required amount of oil are (Waste cook oil) 1300 mL, NaOH 300 gm, HCl 450 mL, CH 3 OH 900 mL.…”

“…Kaniz et al (2011) [19] describe the transesterification and three-step method for biodiesel preparation from waste cook oil. The production cost of biodiesel was calculated for transesterification and three-step method and the cost of biodiesel does not exceed 120 Tk.…”

Biodiesel Production Using Solid Acid Catalysts Based on Metal Oxides

“…Thus, the acid catalysts can directly produce biodiesel from low-grade, highly acidic, and water-containing oils. Homogeneous acid catalysts, including strong Brønsted mineral acids (such as sulfuric acid or hydrofluoric acid) and p-toluenesulfonic acid, although effective, lead to serious contamination and corrosion problems that require the implementation of good separation and purification steps [15][16][17]. More recently, a "green" approach to biodiesel synthesis stimulated the application of sustainable solid acid catalysts as replacements for such liquid acid catalysts such that the use of harmful substances and the generation of toxic wastes are avoided; meanwhile, ease of catalyst separation after the reactions can be attained.…”