The prospects of using Acrocomia aculeata ( macaúba ) a non-edible biodiesel feedstock in Brazil

César, Aldara da Silva; Almeida, Fabiano de Azedias; Souza, Raquel Pereira de; Silva, Gilmar Clemente; Atabani, A.E.

doi:10.1016/j.rser.2015.04.125

Cited by 105 publications

(101 citation statements)

References 12 publications

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“…Among these is the fruit of macauba (Acrocomia aculeata), which stands out for its high yield potential because it can produce 4500 to 6000 liters of oil per hectare year (Bergmann et al, 2013;César et al, 2015), greater than the oil yield per hectare year of annual crops such as soybeans (560 liters), sunflower (774 liters) and castor (810 liters) (Bergmann et al, 2013). Ilha et al (2014) showed that the biodiesel obtained from Acrocomia aculeata has acceptable properties for use in diesel engines; however, due to the predominant composition of unsaturated fatty acids, it requires the use of an antioxidant additive.…”

Section: Introductionmentioning

confidence: 99%

“…Macauba oil is obtained from the pulp and almond, wherein the pulp comprises ~45% of the fruit (Ramos et al, 2008) and has between 18.7 to 29 wt% of oil (Coimbra and Jorge, 2012;Ciconini et al, 2013). The literature reports the high FFA content in macauba pulp oil (Doná et al, 2013;Aguieiras et al, 2014;Iha et al, 2014;Navarro-Díaz et al, 2014;César et al, 2015), between 10.5 to 65.4 wt%, due to the presence of fatty acids in the fruit tissues of Acrocomia aculeate (César et al, 2015) and because the oil is obtained by pressing and filtration without refining steps. The processing of this crude oil for biodiesel production requires the use of methods tolerant to free fatty acids (César et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…The literature reports the high FFA content in macauba pulp oil (Doná et al, 2013;Aguieiras et al, 2014;Iha et al, 2014;Navarro-Díaz et al, 2014;César et al, 2015), between 10.5 to 65.4 wt%, due to the presence of fatty acids in the fruit tissues of Acrocomia aculeate (César et al, 2015) and because the oil is obtained by pressing and filtration without refining steps. The processing of this crude oil for biodiesel production requires the use of methods tolerant to free fatty acids (César et al, 2015). Ilha et al (2014) obtained macauba biodiesel using a two-step reaction: esterification of FFA with sulfuric acid and transesterification with potassium hydroxide.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of process variables on the use of macauba pulp oil as feedstock for the continuous production of ethyl esters under pressurized conditions

Colonelli

Trentini

Santos

et al. 2017

Braz. J. Chem. Eng.

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-This study evaluated the potential of macauba pulp oil (MPO) as a feedstock for continuous ester production using ethanol under pressurized conditions. Experiments were performed in order to obtain data for the effect of process variables on ethyl ester (FAEE) and free fatty acid (FFA) conversion in a catalyst-free process. From the results, it appears that the MPO to ethanol mass ratio and the pressure were the variables with more favorable effect on the evaluated response variables. The addition of n-hexane caused an increase in the production of esters; however, this had a negative effect on FFA conversion. The addition of water was unfavorable for oil processing with high acidity. In this process, esterification and transesterification occur simultaneously, and the high FFA content in MPO provides high yields (85 wt% of esters; 93% FFA conversion) at low temperature, since the esterification reaction rate is higher than the transesterification. The decomposition of fatty acids was evaluated and levels <5% were observed under the evaluated experimental conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assessment of process variables on the use of macauba pulp oil as feedstock for the continuous production of ethyl esters under pressurized conditions

Colonelli

Trentini

Santos

et al. 2017

Braz. J. Chem. Eng.

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“…) at the time of harvest. This fact favors the growth and development of microorganisms during storage (CICONINI et al, 2013). These issues evidence the need to adopt postharvest strategies.…”

Section: Introductionmentioning

confidence: 99%

Drying of macaw palm fruits and its influence on oil quality

Silva

Evaristo

Grossi

et al. 2017

SCA

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After harvest, macaw palm fruits show high deterioration rates when improperly preserved. A possible cause is the high fruit water content favoring enzymatic and microbiological degradation. Therefore, this study aimed to evaluate the effect of drying on the mesocarp oil quality during storage and to set the drying curve of macaw palm fruits. For that, two experiments were carried out. In the first, the drying curve of macaw palm fruits was determined at 60 °C, and mathematical models were defined for the process. Drying was performed with freshly harvested fruits (S0) and with fruits stored for 20 days after harvest (S20). Fruits were stored for 20 days after harvested and then went through drying. The fruits were dried in a prototype dryer at 60 °C. After drying, the fruits were stored for different periods (0, 15, 30, 45, 60, and 90 days) and evaluated for oil physicochemical parameters. When compared to S0, drying of macaw palm fruits in the S20 treatment showed a lower drying time until equilibrium moisture was reached. In general, all the mathematical models tested were adequate to describe the drying process. Fruits dried at 60 °C controlled mesocarp oil acidification for up to 90 days in storage. On the other hand, drying impaired the mesocarp oil oxidative stability. We may conclude that the drying process is efficient to maintain acidity during the storage of macaw palm fruits. Key words: Acrocomia aculeate. Temperature. Mathematical models. Postharvest. Biodiesel. ResumoFrutos de macaúba apresentam elevada deterioração quando não conservados adequadamente após a colheita. Uma possível causa é o elevado teor de água nos frutos, o que pode favorecer a degradação enzimática e microbiológica dos frutos. Diante do exposto, objetivou-se com esse estudo avaliar o efeito da secagem na manutenção da qualidade do óleo do mesocarpo durante o armazenamento e determinar a curva de secagem de frutos de macaúba. Para isso, realizou-se dois experimentos. No primeiro, determinou-se a curva de secagem dos frutos de macaúba na temperatura de 60 °C e definiu-se modelos matemáticos para o processo. A secagem foi realizada com frutos recém colhidos (S0) e frutos armazenados durante 20 dias após a colheita (S20). Após a colheita os frutos foram armazenados durante 20 dias, após esse período foi realizado o processo de secagem. Os frutos foram secos em um secador protótipo a temperatura de 60°C. Após a secagem, os frutos foram armazenados por diferentes períodos (0, 15, 30, 45, 60 e 90 dias) e avaliados quanto aos parâmetros físico-químicos do óleo. A secagem dos frutos de macaúba no tratamento S20, apresentou menor tempo de secagem até atingir umidade de equilíbrio comparado a S0. Em geral, todos os modelos matemáticos testados foram adequados para descrever o processo de secagem. Frutos secos a 60°C promoveu controle da acidificação do óleo do mesocarpo por até 90 dias em armazenamento. Por outro lado, a secagem prejudicou a estabilidade oxidativa do óleo do mesocarpo. Conclui-se que o processo de secagem é eficien...

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“…Lodd). This species provides a high pulp oil yield, close and even higher than oil palm 4,5 , with suitable features for oil-based products besides a large amount of useful coproducts 6,7 . However, the development to obtain high quality macauba pulp oil is still in the beginning.…”

Section: Introductionmentioning

confidence: 97%

Macauba ( Acrocomia aculeata ) pulp oil quality is negatively affected by drying fruits at 60 ºC

Favaro

Miranda

Ciaconini

et al. 2017

Braz. arch. biol. technol.

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The prospects of using Acrocomia aculeata ( macaúba ) a non-edible biodiesel feedstock in Brazil

Cited by 105 publications

References 12 publications

Assessment of process variables on the use of macauba pulp oil as feedstock for the continuous production of ethyl esters under pressurized conditions

Assessment of process variables on the use of macauba pulp oil as feedstock for the continuous production of ethyl esters under pressurized conditions

Drying of macaw palm fruits and its influence on oil quality

Macauba ( Acrocomia aculeata ) pulp oil quality is negatively affected by drying fruits at 60 ºC

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