Synthesis of biodiesel from Nigella sativa seed oil using surfactant-Brønsted acidic-combined ionic liquid as catalyst

Aghabarari, Behzad; Dorostkar, Nasim; Martı́nez-Huerta, M.V.

doi:10.1016/j.fuproc.2013.10.003

Cited by 40 publications

(26 citation statements)

References 35 publications

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“…This is likely due to an excessive amount of the catalyst, although further increases in the amount of catalyst could result in some degree of catalyst aggregation and decrease the number of acidic sites available (22,23). Similar results have also been reported in the literature about the surfactant-Brønsted acidic-combined catalyst (18,19,24). Therefore, the optimum mass ratio of the catalyst to oleic acid was found to be 5%.…”

supporting

confidence: 80%

“…The results indicate that the conversion was increased with increasing the reaction time, and reached a maximum of 77.2% with a reaction time of 3 h. After this time, the conversion was decreased slightly. This observation indicates that esterification is an equilibrium reaction and the ester product can react with water formed during the reaction to reduce slightly the conversion of oleic acid after 3 h (18,19,25,26).…”

mentioning

confidence: 90%

“…Surfactant-like ILs, which have amphiphilic nature and are able to form micelle in aqueous solution, represent a novel generation of cationic surfactants with peculiar properties (14)(15)(16)(17), and have recently been taped as a new class of IL. Aghabarari et al described the use of some surfactant-Brønsted acidiccombined ILs based on imidazolium cations as catalysts, which increased the efficiency of transesterification and esterification (18,19). However, ILs containing imidazolium cation are relatively expensive, hindering their industrial applications.…”

Section: Introductionmentioning

confidence: 99%

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Esterification synthesis of ethyl oleate catalyzed by Brønsted acid–surfactant-combined ionic liquid

Zheng

Yang

et al. 2017

Green Chemistry Letters and Reviews

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ABSTRACT3-(N,N-dimethyldodecylammonium) propanesulfonic acid hydrogen sulfate [HSO 4 ]), a Brønsted acidic-surfactant-combined ionic liquid, was successfully prepared from cheap materials and applied to catalyze the esterification synthesis of ethyl oleate using oleic acid and ethanol as precursors. The produced condition of oleic acid ethyl ester was optimized including the amount of catalyst, reaction time, molar ratio and content of water. Under optimal condition (ethanol to oleic acid molar ratio, 3:1; amount of the catalyst, 5 wt% (based on the mass of oleic acid); reaction time, 3 h; reaction temperature, 78°C; and content of water, 0.4 wt%), the conversion of oleic acid was over 97%. Due to the reverse micelles formed by [HSO 4 ], the microreactor not only promoted the esterification toward the desired side of the ester, but also avoided the hydrolysis of ester. Moreover, the [SB3-12][HSO 4 ] could be reused by a simple decantation separating process and noticeable loss of catalytic activity was not observed even after being recycled for five cycles. The green system offers several advantages, such as excellent yield, efficient catalytic activity, free-solvent and simple operational procedure. ARTICLE HISTORY

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supporting

confidence: 80%

mentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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Esterification synthesis of ethyl oleate catalyzed by Brønsted acid–surfactant-combined ionic liquid

Zheng

Yang

et al. 2017

Green Chemistry Letters and Reviews

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“…In order to reduce these costs, alternative raw materials, such as waste frying oils, have been used (Aghabarari, Dorostkar, & Martinez-Huerta, 2014;Cremonez et al, 2015). Among the raw materials, soybean and canola oils stand out for having large amounts of free fatty acids and unsaturated carbon chains (Serrano et al, 2014), which compromise their oxidative stability, especially when it comes to biodiesel storage for a prolonged period of time (Serrano, Bouaid, Martínez, & Aracil, 2013).…”

Section: Introductionmentioning

confidence: 99%

<b>Oxidative stability of biodiesel blends derived from waste frying oils

et al. 2017

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ABSTRACT. The high cost of biodiesel production is mainly linked to the price of raw material.This factor has favored the use of alternative fats and oils such as those used in frying. Since biodiesel can be obtained from several vegetable and animal raw materials, the physicochemical characteristics of the fuel may vary considerably. One of these characteristics is the fatty acid composition. It directly affects the oxidative stability of biodiesel, which can be impaired when the fuel undergoes exposure to sunlight, metals, oxygen and high temperatures. In order to improve the oxidative stability of biodiesels produced from waste frying oil some studies involving blends of different raw materials have been carried out. In this sense, this work aimed to assess the characteristics resulting from the blending of soybean waste frying oil with other waste biodiesels in what concerns to oxidation. The blends of fatty materials were obtained by means of a 2² factorial design. The induction periods of biodiesel blends were enough to meet the ASTM D6751 standard. Swine fat was responsible for the increase in the induction period values.Keywords: pequi oil, swine fat, transesterification, waste biodiesel.Estabilidade oxidativa de blendas de biodiesel de fritura RESUMO. O alto custo de produção do biodiesel está ligado principalmente ao preço da matéria-prima e este fator tem favorecido a utilização de óleos e gorduras alternativos como os de fritura. Uma vez que o biodiesel pode ser obtido a partir de diversas matérias-primas vegetais e animais, as características físico-químicas do combustível são bastante variáveis, dentre elas a composição em ácidos graxos que afeta diretamente a estabilidade oxidativa do biocombustível. A estabilidade oxidativa de biodiesel pode ser prejudicada quando o combustível sofre exposição à luz solar, metais, oxigênio e altas temperaturas, principalmente. A fim de melhorar a estabilidade oxidativa de biodieseis produzidos a partir de óleos e gorduras residuais de fritura, vem sendo realizados alguns estudos que envolvem blendas de diferentes matérias-primas. Neste sentido o presente trabalho tem como objetivo avaliar as características resultantes da blendagem de biodiesel residual de soja com outros biodieseis residuais do ponto de vista oxidativo. As blendas dos materiais graxos foram obtidas a partir de planejamento fatorial 2². Os períodos de indução das blendas de biodiesel foram suficientes para atender à norma ASTM D6751, sendo que a gordura suína foi responsável pelo aumento destes valores.Palavras-chave: óleo de pequi, gordura suína, transesterificação, biodiesel residual.

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“…Transesterification is a chemical reaction that triglycerides and alcohols, in the presence of a catalyst, convert to fatty acid alkyl esters and glycerol [9][10][11][12]. Glycerol is a main by-product of transesterification reaction [3].…”

Section: Introductionmentioning

confidence: 99%

Optimization of lipid productivity by Citrobacter youngae CECT 5335 and biodiesel preparation using ionic liquid catalyst

Maymandi

Rahimpour

2015

Fuel

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Synthesis of biodiesel from Nigella sativa seed oil using surfactant-Brønsted acidic-combined ionic liquid as catalyst

Cited by 40 publications

References 35 publications

Esterification synthesis of ethyl oleate catalyzed by Brønsted acid–surfactant-combined ionic liquid

Esterification synthesis of ethyl oleate catalyzed by Brønsted acid–surfactant-combined ionic liquid

<b>Oxidative stability of biodiesel blends derived from waste frying oils

Optimization of lipid productivity by Citrobacter youngae CECT 5335 and biodiesel preparation using ionic liquid catalyst

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