Thermoanalytical characterization of castor oil biodiesel

Conceição, Marta Maria da; Candeia, Roberlucia Araújo; Silva, Fernando C.; Bezerra, A. F.; Fernandes, Valter J.; Souza, A. G.

doi:10.1016/j.rser.2005.10.001

Cited by 228 publications

(133 citation statements)

References 8 publications

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“…Esse resultado parece indicar que, mesmo quando não é empregado o procedimento clássico de catálise alcalina descrito na literatura [21,22] , a reação entre o óleo de mamona e a dietanolamina ocorre quando o sistema é aquecido à temperatura de 120 °C.…”

Section: -Preparação De Resinas De Poliuretana à Base De óLeo De Mamounclassified

Preparação de Resinas de Poliuretana à Base de Óleo de Mamona e Dietanolamina e sua Aplicação em Circuitos Eletroeletrônicos

Cardoso

Balaban

2013

Polímeros

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Resumo: O óleo de mamona é um óleo vegetal que permite várias reações em seus grupos funcionais hidroxila. O ácido ricinoleico (ácido 12-hidroxioleico) compõe cerca de 90% dos ácidos graxos presentes, enquanto os outros 10% são não hidroxilados. Este trabalho teve como objetivo obter polióis a partir de misturas do óleo de mamona tipo I (OM) com dietanolamina (DEA), visando elevar o grau de reticulação dos produtos finais, para uso em circuitos eletroeletrônicos. A intenção de se introduzir a dietanolamina nas formulações de resina de poliuretana advém das dificuldades apresentadas por empresas do ramo na aquisição da trietanolamina, que atualmente se encontra sob controle de órgãos federais. Análises químicas e espectroscópicas evidenciaram a obtenção de polióis com índice de hidroxila entre 230 e 280 mgKOH/g. A cinética da reação de poliadição entre os polióis resultantes e o isocianato de isoforona (IPDI) foi acompanhada pelas mudanças nas propriedades reológicas do meio, a 60 °C. As poliuretanas apresentaram propriedades compatíveis com as dos produtos atualmente disponíveis no mercado, obtidos com trietanolamina (TEA). Palavras-chave: Óleo de mamona, dietanolamina, poliuretana, propriedades reológicas, propriedades elétricas, dureza. Preparation of Polyurethane Resins Based on Castor Oil and Diethanolamine and their Application in Electronic CircuitsAbstract: Castor oil (CO) is a vegetable oil that allows for multiple reactions in their hydroxyl functional groups. Ricinoleic acid (12-hidroxioleic acid) comprises about 90% of the fatty acids present while the remaining 10% are not hydroxylated. The aim of the present work was to obtain polyols from castor oil (CO) and diethanolamine (DEA), to improve the crosslinking degree of final products to be used in electronic circuits. The use of diethanolamine instead of triethanolamine in the polyurethane resin formulation is of special interest of companies, due to the difficulties in acquiring triethanolamine, which is controlled by the Brazilian Army. Chemical and NMR characterization showed that the polyol obtained had a hydroxyl number between 230 and 280 mgKOH/g. The kinetics of the polyaddition reaction from polyols and isophoronediisocyanate (IPDI) was evaluated employing rheological assays at 60 °C. The polyurethane based on DEA had compatible properties with the commercial products obtained from triethanolamine (TEA).

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Section: -Preparação De Resinas De Poliuretana à Base De óLeo De Mamounclassified

Preparação de Resinas de Poliuretana à Base de Óleo de Mamona e Dietanolamina e sua Aplicação em Circuitos Eletroeletrônicos

Cardoso

Balaban

2013

Polímeros

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“…Ricinoleic acid is the main fatty acid from castor oil, this fatty acid possesses 18 carbons with three highly reactive functional groups: the carbonyl group in 1 st carbon, the double linking or insaturation in 9 th carbon and the hydroxyl group in 12 th carbon. This feature causes castor oil properties are different from other vegetable oils [11]. The high content of ricinoleic acid, with a hydroxyl group, is the reason for castor oil has especially high viscosity and density.…”

Section: Introductionmentioning

confidence: 97%

Synthesis and characterization of biodiesel obtained from castor oil transesterification

Martín

González²,

Martínez³

et al. 2024

RE&PQJ

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Abstract. The objectives of this work were to optimize the variables affecting transesterification process for biodiesel production from castor oil, non edible oil, by acid catalysis (sulphuric and phosphoric acid) and basic catalysis (potassium methoxide and potassium hydroxide); and to characterize the biodiesel for its use as fuel in compression ignition motors. The studied operation variables were methanol/oil molar ratio (3:1, 6:1, 9:1, 12:1), temperature (25, 35, 45, 55, 65 ºC), and catalyst amount (2, 3, 4 wt.% in acid catalysis, and 0.5, 1.0, 1.5 wt.% in basic catalysis). Evolution of each process was followed by gas chromatography, determining the content of methyl esters at different reaction times. Biodiesel was characterized by a set of parameter according to European Standard, EN 14214. The best conditions for transesterification process were 9:1 methanol/oil molar ratio, 65 ºC, and the use of potassium methoxide as catalyst with concentration 1.0 wt.%. In these conditions, obtained biodiesel presents satisfactory values of water content, iodine and saponification values, flash and combustion points, and temperature of 50% of distillate. However, values of density, kinematic viscosity, cetane index and cold filter plugging point, that are heavily dependent on oil, move away from those required by the European Standard.

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“…The fuel-related properties of castor oil with the high density (0.956 to 0.963 g/ml at 20°C, above the maximum limit in EN 14214 European biodiesel specification), viscosity under 50°C and hygroscopicity suggest that castor biodiesel cannot be used in its pure form [42][43][44][45][46], but rather in blends with regular diesel or biodiesel made with other lipid feedstocks. Importantly, biodiesel made of castor oil has lower cost compared to other vegetable oil feedstocks because it is the only oil that is soluble in alcohol and does not require heat and the consequent energy requirement of other vegetable oils in transforming them into fuel [47]. Biodiesel from castor achieved an average of almost 90% less GHG emissions when compared to regular diesel.…”

Section: Benefits and Disadvantages Of Biodieselmentioning

confidence: 99%

Biofuels Get in the Fast Lane: Developments in Plant Feedstock Production and Processing

Triantafyllidis¹

2013

Adv Crop Sci Tech

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In recent years, high volatility in oil prices and global climate change led to an increased interest in biofuel production to reduce dependency on foreign fossil fuel. Domestically produced plant feedstocks are environmentally friendly renewable substitutes for fossil-derived fuel and are expected to stabilize fuel prices. Plant-derived energy can offer rural development and other environmental, social and energy security benefits for local societies. Crops, grasses, trees, forest-residues and aquatic plants, all can be used as potential biofuel feedstocks. To meet the increased global and regional demand for bioenergy, evaluation and improvement of current and emergent plant feedstocks is urgently needed to reduce the cost of the resulting biofuels.

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Thermoanalytical characterization of castor oil biodiesel

Cited by 228 publications

References 8 publications

Preparação de Resinas de Poliuretana à Base de Óleo de Mamona e Dietanolamina e sua Aplicação em Circuitos Eletroeletrônicos

Preparação de Resinas de Poliuretana à Base de Óleo de Mamona e Dietanolamina e sua Aplicação em Circuitos Eletroeletrônicos

Synthesis and characterization of biodiesel obtained from castor oil transesterification

Biofuels Get in the Fast Lane: Developments in Plant Feedstock Production and Processing

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