Biodiesel Production from Castor Oil: Optimization of Alkaline Ethanolysis

Silva, Nívea de Lima da; Batistella, César Benedito; Filho, Rubens Maciel; Maciel, Maria Regina Wolf

doi:10.1021/ef900403j

Cited by 79 publications

(9 citation statements)

References 20 publications

(30 reference statements)

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“…The analysis of the main effects and their interactions in the form of analysis of variance (ANOVA) are presented in Table 2 at the 95% confidence level ( p < 0.05). The p -values are used to check the significance of the corresponding coefficient and the smaller the p -values are, the bigger the significance of the corresponding coefficient (De Lima Da Silva et al, 2009 ). The model presented a p -value 0.001, which indicates that the model is very suitable.…”

Section: Resultsmentioning

confidence: 99%

Mixture Design and Doehlert Matrix for the Optimization of the Extraction of Phenolic Compounds from Spondias mombin L Apple Bagasse Agroindustrial Residues

et al. 2018

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In this study, we have determined, using RSM (mixture design and Doehlert matrix), the optimum values of the independent variables to achieve the maximum response for the extraction of total phenolic compounds from Spondias mombin L bagasse agroindustrial residues in order to preserve their antioxidant activity. The extraction of phenolic compounds, as well as their antioxidant capacity and the capacity to scavenge ABTS, was determined by the modified DPPH method at different periods of time, temperature, velocity of rotation and solvents concentration. We observed that the optimum condition for the highest antioxidant yield was obtained using water (60.84%), acetone (30.31%), and ethanol (8.85%) at 30 • C during 20 min at 50 rpm. We have also found that the maximum yield of total phenolics was 355.63 ± 9.77 (mg GAE/100 g), showing an EC 50 of 3,962.24 ± 41.20 (g fruit/g of DPPH) and 8.36 ± 0.30 (µM trolox/g fruit), which were measured using DPPH and ABTS assays. These results suggest that RSM was successfully applied for optimizing the extraction of phenolics compounds thus preserving their antioxidant activity.

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Section: Resultsmentioning

confidence: 99%

Mixture Design and Doehlert Matrix for the Optimization of the Extraction of Phenolic Compounds from Spondias mombin L Apple Bagasse Agroindustrial Residues

et al. 2018

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“…There is a diversity of scientific literature on transesterification of castor oil with ethanol ( de Oliveira et al 2005, Plentz Meneghetti et al 2006, Varma & Madras 2007, Albuquerque et al 2009de Lima da Silva et al 2009, Cavalcante et al 2010, Efeovbokhan et al 2012, Martínez Arias et al 2012, Thomas et al 2013. In a study developed by our group (Hincapié et production from crude castor oil using ethanol was conducted.…”

Section: Introductionmentioning

confidence: 99%

Effect of microwave-assisted system on transesterification of castor oil with ethanol

Hincapié

Valange²,

Barrault³

et al. 2014

Univ. Sci.

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A systematic study of microwave-assisted transesterification of castor oil was conducted in the presence of ethanol and of potassium hydroxide as catalyst. Effects of various reaction parameters such as reaction time, catalyst concentration, reaction temperature and ethanol-oil molar ratio were analyzed. Ethyl esters were successfully produced by microwave-assisted transesterification. The maximum yield was 80.1% at 60°C, 10:1 alcohol: oil molar ratio, 1.5% potassium hydroxide and 10 min. The results show that there was a reduction in reaction time for microwave-assisted transesterification as compared to conventional heating, yields were slightly affected by temperature from 40-70ºC; this indicates a significant effect of microwaves even at low temperatures.

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“…Nevertheless, castor oil is non-edible and toxic owing to the presence of a toxic protein. Castor oil is unusually polar due to the presence of hydroxyl group at C-12 that accounts for the unique physical and chemical properties such as high viscosity, specific gravity, boiling point and excellent solubility in alcohol (De Lima Da Silva et al, 2009;Yusuf et al, 2015). Castor oil is a triglyceride containing ricinoleic acid (91 -95%), linoleic acid (4 -5%), oleic acid (2 -4%) and palmitic and stearic acids each 1 -2% (Pradhan et al, 2012).…”

Section: Feedstock For Biodiesel Productionmentioning

confidence: 99%

Production of Biodiesel from Mixed Castor Seed and Microalgal Oils: Characterization and Optimization Studies

Beyene

Abagisa²,

Kebede

2020

Preprint

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In order to lower the high prices of individual feedstock, extend the life of a more limited feedstock and to improve the fuel properties of biodiesel it imperative to optimize process parameters for biodiesel derived from mixed feedstocks. Samples of castor seeds were collected from Jimma zone, southwest Ethiopia while sample of wet microalgal biomass was obtained from wastewater stabilization ponds using a 60µm filter screen. The castor seeds and algal biomass were sun-dried before further dried at 800C in an oven and ground to pastes. Oils were extracted from dried and milled castor seeds and micro-algae pastes with a Soxhlet apparatus using methanol. The extracted oil was purified and characterized before converted to biodiesel. A transesterification process designed using Response Surface Methodology (RSM) based on central composite design (CCD) experimental design was used to optimize the biodiesel production process parameters from mixed oil using alkaline catalyst. The Design Expert® 12 software was used to analysis experimental results. The effects of catalyst concentration, ethanol to mixed oil molar ratio and reaction temperature on the biodiesel yield were investigated using the experimental results. Accordingly, the optimum conditions for biodiesel production from mixed oil were a catalyst concentration of 1.23 % w.t of the oil, alcohol to mixed oil molar ratio of 5.94:1 (v/v) and reaction temperature of 51.300C. The yield of biodiesel under these conditions was 93.88%. Experiment was conducted under the specified optimum conditions to validate the result predicted by the software. The yield of biodiesel from the experiment was 93.36% which is very close to the value predicted by the software. The fatty acid composition of the biodiesel from mixed oil was analyzed using Gas chromatograph. The various fuel properties of biodiesel were determined using standard methods and results were compared with ASTM D6751 and EN 14214 standards. The physicochemical properties fulfill both standards.

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Biodiesel Production from Castor Oil: Optimization of Alkaline Ethanolysis

Cited by 79 publications

References 20 publications

Mixture Design and Doehlert Matrix for the Optimization of the Extraction of Phenolic Compounds from Spondias mombin L Apple Bagasse Agroindustrial Residues

Mixture Design and Doehlert Matrix for the Optimization of the Extraction of Phenolic Compounds from Spondias mombin L Apple Bagasse Agroindustrial Residues

Effect of microwave-assisted system on transesterification of castor oil with ethanol

Production of Biodiesel from Mixed Castor Seed and Microalgal Oils: Characterization and Optimization Studies

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