Biodiesel from Used Frying Oil. Variables Affecting the Yields and Characteristics of the Biodiesel

Martín, Juan Vicente González; González, J.F.; Rodriguez-Reinares, Antonio

doi:10.1021/ie040214f

Cited by 441 publications

(222 citation statements)

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“…Therefore EU banned the use of waste cooking oils in the composition of animal feed in 2002. Most of the toxic compounds in the waste cooking oil are oxidation products from fatty acids, especially from polyunsaturated fatty acids [5], [6]. Manuscript application of Fourier transform infrared (FTIR) spectroscopy has increased in food studies, and particularly has become a powerful analytical tool in the study of edible oils and fats.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Waste Palm Cooking Oil for Biodiesel Production

Ullah¹,

Bustam²,

Man³

2014

IJCEA

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Abstract-Used cooking oils are of increasing interest as inexpensive feedstock for biodiesel production. In this work, we characterized the used cooking oil collected from the cafeteria in Universiti Teknologi PETRONAS. The spectroscopic analysis was performed for the used and unused cooking oil samples. Comparison of the data indicated that no significance spectroscopic and structural changes occurred for used and unused oil samples. The results indicate high degree of saturation and mono unsaturated fatty acids in the oil. The viscosity and acid value of the used oil was considerably higher than the unused oil. It can be concluded on the basis of our results that the difference in the behaviour and performance of oil is not only due to the main components (triglycerides) but also due to minor components (Vitamin E).Index Terms-FTIR, 1 HNMR, TGA, triglycerides, unused and used palm oil.

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Section: Introductionmentioning

confidence: 99%

Characterization of Waste Palm Cooking Oil for Biodiesel Production

Ullah¹,

Bustam²,

Man³

2014

IJCEA

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“…Since the prices of edible vegetable oils, e.g. soybean oil, are higher than that of diesel fuel, waste vegetable oils (Encinar, et al, 2005;Felizardo, et al, 2006;Dorado, et al, 2002;Cetinkaya and Karaosmanolu, 2004) and non-edible crude vegetable oils as Jatropha, Pongamia pinnata (Karmee and Chadha, 2005) and tigernut oil (Ugheoke, et al, 2007) have been intensively investigated as potential low priced biodiesel sources. Biodiesel made from these feedstocks was predicted to be more economical than the biodiesel produced from refined vegetable oil.…”

Section: Introductionmentioning

confidence: 99%

“…Alkyl oxide solutions of sodium methoxide or potassium methoxide in methanol, which are now commercially available, are the preferred catalysts for large continuous-flow production processes (Singh, et al, 2006). Biodiesel with the best properties was obtained using potassium hydroxide as catalyst in many studies (Encinar, et al, 2005;Jeong and Park, 1996;Karmee, 2005;Dorado, et al, 2004;Dorado, et al, 2002;Darnoko and Cheryman, 2000;Ugheoke, et al, 2007;El-Mashad, et al, 2006). Besides, many other studies achieved best results using NaOH (Felizardo, et al, 2006;Vicente, et al, 2004;Cheng, et al, 2004;de Oliveira, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…The stoichiometric ratio for transesterification requires three moles of alcohol and one mole of triglyceride to yield three moles of fatty acid alkyl esters and one mole of glycerol.However, transesterification is an equilibrium reaction in which a large excess of alcohol is required to drive the reaction to the right. For maximum conversion to the ester, a molar ratio of 6:1 was mostly used (Vicente, et al, 2004;Encinar, et al, 2005;Darnoko and Cheryman, 2000;Meka, et al, 2007;Ugheoke, et al, 2007). In other studies, the optimum ratio was 10:1 (Jeong and Park, 1996;Cheng, et al, 2004;Karmee, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Production optimization and quality assessment of biodiesel from waste vegetable oil

Refaat

Attia

Sibak

et al. 2007

Int. J. Environ. Sci. Technol.

185

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Biodiesel production is worthy of continued study and optimization of production procedures because of its environmentally beneficial attributes and its renewable nature. In Egypt, millions L. of oil used for frying foods are discarded each year into sewage systems. Thus, it adds to the cost of treating effluent or pollutes waterways. This study is intended to consider aspects related to the feasibility of the production of biodiesel from waste/recycled oils in an attempt to help reduce the cost of biodiesel and reduce waste and pollution coming from waste oils. The variables affecting the yield and characteristics of the biodiesel produced from used frying oil were studied, the achieved results were analyzed and a set of recommendations was proposed. From the obtained results, the best yield percentage was obtained using a methanol/oil molar ratio of 6:1, potassium hydroxide as catalyst (1%) and 65 °C temperature for one hour. The yield percentage obtained from waste vegetable oil was comparable to that obtained from neat vegetable oil which reached 96.15% under optimum conditions. From the results it was clear that the produced biodiesel fuel, whether from neat vegetable oil or waste vegetable oil, was within the recommended standards of biodiesel fuel.

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“…With further increase in molar ratio the conversion efficiency more or less remains the same but the energy required for the recovery of methanol becomes higher. It was concluded that the use of waste cooking oils is an effective way to reduce the cost of biodiesel production 5 . The advantages of using waste cooking oils to produce biodiesel are the low cost and prevention of environment pollution.…”

Section: Introductionmentioning

confidence: 99%

Production of Biodiesel Fuel from Waste Soya bean Cooking Oil by Alkali Trans-esterification Process

Deshpande

Chavda

Kadeval

2016

Curr. World Environ

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Biodiesel is biodegradable, clean-burning, non-toxic, renewable, high-quality, and cheap diesel fuel made primarily from waste vegetable oil which can be used without any alterations in engine design. The paper is concerned with the extraction and quality evaluation of the biodiesel fuels synthesized from waste soya bean cooking oil. Waste soya bean cooking oil had high amount of free fatty acid. Thus, single step transesterification process with the aid of homogeneous catalyst as 1% potassium hydroxide were implemented in this experiment. Methanol was chosen as alcohol solvent. In the transesterification process, the triglycerides in waste cooking oil was reacted with a methanol to form esters and glycerol as byproduct. The biodiesel were extracted for different oil to methanol ratio as 1:2, 1:3 and 1:4. The highest biodiesel yield of 76% was obtained at 1:3 volumetric ratio for 60ºC reaction temperature and 1250 rpm stirring speed. Results show that the optimal methyl ester yield of 90% occurred at methanol: oil volume ratio of 3:1. The product met the ASTM fuel standards for relative density, acid value, relative density, calorific value, flash point and kinematic viscosity.

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Biodiesel from Used Frying Oil. Variables Affecting the Yields and Characteristics of the Biodiesel

Cited by 441 publications

References 33 publications

Characterization of Waste Palm Cooking Oil for Biodiesel Production

Characterization of Waste Palm Cooking Oil for Biodiesel Production

Production optimization and quality assessment of biodiesel from waste vegetable oil

Production of Biodiesel Fuel from Waste Soya bean Cooking Oil by Alkali Trans-esterification Process

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