Analysis of biodiesel and frying vegetable oils by means of FTIR photoacoustic spectroscopy

Lima, S.M.; Izida, T.; Figueiredo, M. S.; Andrade, Luís Humberto da Cunha; Ré, Patrícia Vieira Del; Jorge, Neuza; Buba, E.; Aristone, Flávio

doi:10.1140/epjst/e2008-00502-9

Cited by 20 publications

(12 citation statements)

References 6 publications

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“…Furthermore, they can be useful to gain information on the changes in the frying oil quality, as their results showed high correlation coefficients with the determination of polar compounds. Amore recent study by Lima et al (2008) used Fourier Transform Infrared Photoacoustic Spectroscopy (FTIR-PAS) in identifying or monitoring spectral changes induced in the vegetable oils due to a degradation effect. Besides, the method can be used to contribute to the biodiesel wash process to separate the glycerol from the biodiesel.…”

Section: Identifying the Characteristics Of Used Frying Oilsmentioning

confidence: 99%

Different techniques for the production of biodiesel from waste vegetable oil

Refaat

2009

Int. J. Environ. Sci. Technol.

283

118

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ABSTRACT:The production of biodiesel from waste vegetable oil offers a triple-facet solution: economic, environmental and waste management. The new process technologies developed during the last years made it possible to produce biodiesel from recycled frying oils comparable in quality to that of virgin vegetable oil biodiesel with an added attractive advantage of being lower in price. Thus, biodiesel produced from recycled frying oils has the same possibilities to be utilized. While transesterification is well-established and becoming increasingly important, there remains considerable inefficiencies in existing transesterification processes. There is an imperative need to improve the existing biodiesel production methods from both economic and environmental viewpoints and to investigate alternative and innovative production processes. This study highlights the main changes occurring in the oil during frying in order to identify the characteristics of oil after frying and the anticipated effects of the products formed in the frying process on biodiesel quality and attempts to review the different techniques used in the production of biodiesel from recycled oils, stressing the advantages and limitations of each technique and the optimization conditions for each process. The emerging technologies which can be utilized in this field are also investigated. The quality of biodiesel produced from waste vegetable oil in previous studies is also reviewed and the performance of engines fueled with this biodiesel and the characteristics of the exhaust emissions resulting from it are highlighted. The overarching goal is to stimulate further activities in the field.

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Section: Identifying the Characteristics Of Used Frying Oilsmentioning

confidence: 99%

Different techniques for the production of biodiesel from waste vegetable oil

Refaat

2009

Int. J. Environ. Sci. Technol.

283

118

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“…The band at 1,175 cm -1 in this range is most visible in the FAME spectrum. The other bands observed in the FTIR spectrum are typical of the hydrocarbon chain structures present both in FAME and diesel fuel [40][41]: Stretching vibrations of the C-H bond: the methyl group (ν CH 3 ) at wavelengths of ca. 2,870 and 2,965 cm -1 and the methylene group (ν CH 2 ) at wavelengths of ca.…”

Section: Resultsmentioning

confidence: 99%

Spectroscopic Studies of the Quality of Fatty Acid Methyl Esters Derived from Waste Cooking Oil

Matwijczuk¹,

Zając²,

Kowalski³

et al. 2017

Pol. J. Environ. Stud.

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Biodiesel is a very attractive, biodegradable, renewable, and virtually nontoxic form of fuel. It is derived through base-catalysed transesterification of vegetable oils or animal fats. Analysis of biodiesel has become relevant, since the higher quality of the fuel is a key factor in commercialisation and market acceptance. The analytical methods employed are being constantly improved to meet this requirement. The most popular techniques for analysis of biodiesel include mainly chromatography and molecular spectroscopy. FTIR infrared spectroscopy is one of the most important spectroscopic techniques.The article presents the results of UV-Vis absorption spectroscopy and FTIR infrared spectroscopy analysis employed for investigating methyl esters of higher fatty acids obtained with laboratory methods from selected sunflower and rapeseed oils and waste animal fats provided by a slaughterhouse. Commercial methyl esters were included in the analyses for comparison. In all samples, the contents of free glycerol, methanol, esters, and linolenic acid methyl ester in FAME were determined mainly to facilitate the spectroscopic analysis. The results of the investigations conducted with the aforementioned methods clearly indicate that the analysed WCO esters can be successfully used as potential industrial-scale biofuels.

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“…Voort et al (2008) described that the peak between 1500 to 2000 showed ester linkage but between 3000 to 3500 is of -OH or hydrocarbons. According to Lima et al (2008) FTIR spectrum of biodiesel peaks between 3000 and 4000 and showed C-OH bending. Alkanes are oxidized to alcohols and later to carboxylic acids by catalyst.…”

Section: Resultsmentioning

confidence: 99%

Nanobiotechnology for the production of biofuels from spent tea

Mahmood¹,

Hussain²

2010

Afr. J. Biotechnol.

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Bioenergy is the only alternative and cheap source of energy which can be made easily available to the world. The present experiment included three steps for the conversion of spent tea (Camellia sinensis) into biofuels. In the first step, spent tea was gasified using Co nano catalyst at 300°C and atmospheric pressure. Catalytic gasification of spent tea yielded 60% liquid extract, 28% fuel gases and 12% charcoal. Gaseous products contain 53.03% ethene, 37.18% methanol and 4.59% methane. In the second step of the experiment, liquid extract of spent tea obtained from gasification, on transesterification gave 40.79% ethyl ester (biodiesel). In the third step, Aspergillus niger's growth on spent tea produced 57.49% bioethanol. This study reports an interesting finding that spent tea (solid waste) could be used not only for the production of biodiesel and bioethanol but also hydrocarbon fuel gases. The world today is consuming several million tons of tea yearly. The present technology could be utilized to produce alternate energy.

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Analysis of biodiesel and frying vegetable oils by means of FTIR photoacoustic spectroscopy

Cited by 20 publications

References 6 publications

Different techniques for the production of biodiesel from waste vegetable oil

Different techniques for the production of biodiesel from waste vegetable oil

Spectroscopic Studies of the Quality of Fatty Acid Methyl Esters Derived from Waste Cooking Oil

Nanobiotechnology for the production of biofuels from spent tea

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