Comparison of two different processes to synthesize biodiesel by waste cooking oil

Wang, Yong; Ou, Shiyi; Liu, Pengzhan; Xue, Feng; Tang, Shuze

doi:10.1016/j.molcata.2006.02.047

Cited by 414 publications

(174 citation statements)

References 18 publications

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“…Some of the advantages of using biodiesel fuel are its renewability, easy biodegradability, non-toxicity and safer handling due to its higher flash point compared to those of fossil fuels [3]. In addition, biodiesel fuel is also primarily free of sulfur and aromatics, producing more tolerable exhaust gas emissions than conventional fossil diesel [4].…”

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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“…Conventional ultrasonic cleaner and mechanical stirring experiments were performed using the same amounts of reactants and molar ratio WCO to MeOH used in the ultrasonic tubular reactor. The conversion of FFA in the WCO into FAME (fatty acid methyl ester) was calculated from the mean of acid value (Av) of the oil layer by the following equation (1) [31]. ) where Oil and WCO refers to FAME layer and waste cooking oil, respectively.…”

Section: Comparison Of Type Ultrasonic and Mechanical Stirring Methodsmentioning

confidence: 99%

Biodiesel Production From Waste Cooking Oil by Using Ultrasonic Tubular Reactor

Agustian

Praptijanto²,

Sebayang³

et al. 2016

IJIMEAM

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The aim of this research is to find an optimum of synthesis biodiesel from waste cooking oil (WCO) using ultrasonic tubular reactor. The experimental studies explored the variations in reaction time, molar ratio WCO to methanol (MeOH), amount of catalyst, frequency of ultrasonic and output power ultrasonic on the ester contents. Comparisons of type ultrasonic and also mechanical stirring method based on time reaction were investigated. The optimum results of biodiesel process is the reaction time of 5 minute, NaOH catalyst 1%wt of WCO, molar ratio WCO to MeOH of 1:6, frequency ultrasonic of 20 KHz and output power ultrasonic of 650 W. The reaction time reduced 12-24 times compared to both of method and the yield of ester contents was obtained at 96.54%wt.

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“…Lauric acid methyl ester (methyl laurate) was added as a reference into the crude biodiesel, and the samples were analyzed by the above mentioned GC. The analysis of biodiesel for each sample was carried out according to Wang et al (2006). FAME wt% ¼ area ofallFAME area of reference Â weight of reference weight of Biodiesel sample Â f FAME f r Â 100 ð1Þ…”

Section: Biodiesel Characterizationmentioning

confidence: 99%

“…5. As depicted in this figure esterification and transesterification of FFA and TGs are performed slowly (Wang et al 2006;Zhang et al 2003), in which after 6 h the methyl ester weight percent was 29.4 %. Depending on Fig.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Utilization of constructional lime as heterogeneous catalyst in biodiesel production from waste frying oil

Ghanei

Moradi

Heydarinasab

et al. 2013

Int. J. Environ. Sci. Technol.

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Waste frying oil as valueless material which is disposed to environment can be used as a promising feedstock to produce biodiesel. In this study, constructional lime was used as alkaline heterogeneous catalyst for biodiesel production from virgin and waste frying oil. After determining the best activation temperature for the catalyst (600°C), transesterification reactions were carried out at 65°C, MeOH to oil molar ratio of 12:1, and 1 wt% of activated constructional lime under vigorous mixing for 5 h. Yield of reactions for virgin and waste frying oil (2.17 % free fatty acid) and pretreated waste frying oil (0.918 % free fatty acid) were 87, 93.9, and 94 %, respectively. Transesterification of virgin frying oil and pretreated waste frying oil were done at 65°C, MeOH to oil molar ratio of 6:1, and 1 wt% of KOH as catalyst under vigorous mixing for 2 h, for comparison. Yield of the reaction was 98.6 and 95.1 %, respectively. Therefore, when constructional lime is used as catalyst pretreatment of waste oil is not necessary.

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Comparison of two different processes to synthesize biodiesel by waste cooking oil

Cited by 414 publications

References 18 publications

Characterization of Waste Palm Cooking Oil for Biodiesel Production

Characterization of Waste Palm Cooking Oil for Biodiesel Production

Biodiesel Production From Waste Cooking Oil by Using Ultrasonic Tubular Reactor

Utilization of constructional lime as heterogeneous catalyst in biodiesel production from waste frying oil

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