Evaluation of the oxidative stability and flow properties of quaternary mixtures of vegetable oils for biodiesel production

Freire, L. M. S.; Filho, José Rodrigues Carvalho; Moura, Carla Verônica Rodarte de; Soledade, L. E. B.; Stragevitch, Luiz; Cordeiro, Ângela Maria Tribuzy de Magalhães; Santos, I. M. G.; Souza, A. G.

doi:10.1016/j.fuel.2011.11.014

Cited by 36 publications

(8 citation statements)

References 20 publications

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“…It was suggested that more advantageous biodiesel properties were obtained. A quaternary hybrid of non‐edible and edible vegetable oils production of biodiesel from soybean, cotton, Jatropha curcas and babassu oils was used by Freire et al 163 . (2012) to evaluate the oxidative stability and flow properties.…”

Section: Feedstock Hybridization In Biodiesel Productionmentioning

confidence: 99%

Effectiveness of biogenic waste‐derived heterogeneous catalysts and feedstock hybridization techniques in biodiesel production

Etim

Musonge

Eloka‐Eboka

2020

Biofuels Bioprod Bioref

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Biodiesel has the potential to contribute significantly to the elimination of the present global energy and climate change logjam, but its production and commercialization have been hindered by the diverse nature of the feedstocks used for production. This paper reviews the effectiveness of applying various types of crop and animal waste-derived catalysts together with innovative feedstock hybridization as an economically viable technique for biodiesel production. Feedstock challenges, availability, and sustainability for large-scale applications are addressed with a view to bridging the existing gaps. Challenges in the use of edible oils and algae oil sources and development remain, but the technique of feedstock hybridization appears to be very promising, innovative, and cost-effective for biodiesel production. The present state of biodiesel production could be improved by the application of simple and cost-effective technologies in the feedstock system. High free fatty acid (FFA) content is the major hurdle to the use of most oils, especially low-grade/advanced oil feedstocks, in biodiesel production. This could be addressed through technological application of feedstock hybrids and biogenic waste-derived heterogenous catalysts, and their biochemical modifications. Conventional technology for the large-scale application of inorganically derived catalysts in biodiesel production with various characteristic differences is presented. Heterogenous catalysts derived from biogenic wastes and their modification could be used to overcome associated problems with the use of inorganic catalysts in biodiesel production. Biogenic waste-derived heterogenous catalysts are renewable, available, eco-friendly, and cost-effective. Technological applications of heterogeneous catalysts derived from biogenic waste are outlined and reviewed, considering various materials and different modification techniques to identify appropriate options for scaling up development. This review also discusses fundamental considerations for the Review

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Section: Feedstock Hybridization In Biodiesel Productionmentioning

confidence: 99%

Effectiveness of biogenic waste‐derived heterogeneous catalysts and feedstock hybridization techniques in biodiesel production

Etim

Musonge

Eloka‐Eboka

2020

Biofuels Bioprod Bioref

View full text Add to dashboard Cite

show abstract

“…11 Among these disadvantages, the main problems are cold ow behavior and oxidation stability, which depend on the content of saturated and unsaturated fatty acid methyl esters (FAME) in oil. [12][13][14][15] These properties are generally relatively opposite, that is, a biodiesel possesses good cold ow properties when it reveals poor oxidation stability 16 and vice versa. The fatty acid compositions and properties of different biodiesel feedstock and biodiesel vary.…”

Section: Introductionmentioning

confidence: 99%

A comprehensive review on biodiesel cold flow properties and oxidation stability along with their improvement processes

et al. 2015

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7Biodiesel, which comprises fatty acid esters, is derived from different sources, such as vegetable 8 oils from palm, sunflower, soybean, canola, jatropha, and cottonseed, animal fats, and waste 9 cooking oil. Biodiesel is considered as an alternative fuel for diesel engine. However, biodiesel 10 has poor cold flow behavior (i.e., high cloud point & pour point) and oxidation stability 11 compared with petroleum diesel because of the presence of saturated and unsaturated fatty acid 12 esters. Consequently, the performance of biodiesel during cold weather is affected. When 13 biodiesel is oxidized, the subsequent dregs can adversely affect the performance of the fuel 14 system as well as clog the fuel filter, fuel lines, and injector. This phenomenon results in start-up 15 and operability problems. Cold flow behavior is usually assessed through the pour point (PP), 16 cloud point (CP), and cold filter plugging point (CFPP). Earlier studies on cold flow focused on 17 reducing the devastating effect of poor cold flow problems, such as lowering the PP, CP, and 18 CFPP of biodiesel. This present paper provides an overview of the cold flow behavior and 19 oxidation stability of biodiesel, as well as their effect on the engine operation system. The 20 improvements on the behavior of cold flow of biodiesel are also discussed.21

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“…Alta viscosidade ocasiona diminuição no fluxo de injeção e na atomização causando, consequentemente, combustão incompleta gerando formação de depósitos na câmara de combustão (FREIRE, et al, 2012;RAMÍRES et al, VERDUZCO, 2011;LÔBO;FERREIRA;CRUZ, 2009).…”

Section: Propriedades Dependentes Da Composição Do Biodieselunclassified

Avaliação De Métodos De Convergência No Treinamento De Redes Neurais Artificiais Aplicadas À Predição De Índice De Iodo, Viscosidade E Densidade Em Biodiesel

Viegas¹,

Filho²,

Marques³

et al. 2014

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RESUMO:Algumas propriedades do biodiesel, como índice de iodo, viscosidade e densidade, podem sofrer variações conforme as estruturas moleculares dos seus ésteres constituintes. O objetivo do pre-sente estudo é avaliar e comparar três métodos de convergência no treinamento supervisionado de redes neurais com arquitetura MLP na predição de propriedades de biodiesel. Os métodos aplicados foram os de BFGS, Gradiente Descendente e Gradiente Conjugado. Dados do LAPQAP e da literatura foram padronizados, organizados e armazenados no Sistema Oleodata, sendo divididos em três partes: 70% para o treinamento da rede, 15% para a fase de validação e 15% para a de teste. As variáveis de entrada foram os percentuais de cada éster de ácido graxo que compõe as amostras de biodiesel, e as variáveis de saída foram o índice de iodo, a viscosidade e a densidade. As seguintes funções de ativação foram previamente testadas: tangente hiperbólica, seno, identidade, exponencial e logística. Além disso, foram fixadas a quantidade de 1000 redes treinadas para cada variação do estudo e 1000 ciclos de treinamento para cada rede. Em seguida, foram variados os métodos de convergência: BFGS, Gradiente Descenden-te e Gradiente Conjugado. Após a obtenção do método de convergência, um novo treinamento foi feito para a otimização da quantidade de neurônios, variando-se de 5 a 15. Ao final de todos os treinamentos,

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Evaluation of the oxidative stability and flow properties of quaternary mixtures of vegetable oils for biodiesel production

Cited by 36 publications

References 20 publications

Effectiveness of biogenic waste‐derived heterogeneous catalysts and feedstock hybridization techniques in biodiesel production

Effectiveness of biogenic waste‐derived heterogeneous catalysts and feedstock hybridization techniques in biodiesel production

A comprehensive review on biodiesel cold flow properties and oxidation stability along with their improvement processes

Avaliação De Métodos De Convergência No Treinamento De Redes Neurais Artificiais Aplicadas À Predição De Índice De Iodo, Viscosidade E Densidade Em Biodiesel

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