Algae biodiesel: a promise or the future?

Suarez, Paulo A. Z.; Pinto, Ângelo C.

doi:10.1590/s0103-50532011001100001

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…O processo descreve tanto a transesterificação quanto a hidroesterificação para a síntese do biocombustível que ocorrem concomitantemente, dependendo da quantidade de água no meio de reação E à us aà deà sí tesesà aisà ve des ,à algumas pesquisas têm se focado na extração de óleo de algas e sua transesterificação com enzimas suportadas em LI. 87 De fato, biodiesel advindo de algas são um desafio imenso na atualidade, mas também extremamente promissor, 91 principalmente se considerando a eficiência de extração de matérias-primas para biocombustíveis diretamente de algas, utilizando-se LI imidazólios. 92 A utilização de LI na produção de biodiesel advindo de microalgas foi recentemente relatada.…”

Section: Dupont E Colaboradoresunclassified

Enzymes and Ionic Liquids: a Promising Combination Towards a Clean Biodiesel

Medeiros¹,

Gonçalves²,

Rodrigues³

et al. 2013

Revista Virtual De Química

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Abstract:The current manuscript describes the advantages of ionic liquids and lipases (enzymes) association towards a clean biodiesel. Acidic and basic catalytic processes, as their technological drawbacks are discussed herein. The main interaction between such enzymes and ionic liquids are presented for a better understanding of the improvement on the catalytic activity of lipase enzymes when these biocatalysts are supported on an ionic media. Selected examples of recent scientific literature are described to show the promising and powerful combination towards a clean biodiesel synthesis.Keywords: Biodiesel; enzymes; ionic liquids. ResumoO presente artigo descreve as vantagens decorrentes da combinação de líquidos iônicos com enzimas (lipases) visando à obtenção de um biodiesel mais limpo. São discutidos os processos catalisados por ácidos e por bases e as suas desvantagens são discutidas. As principais interações entre as enzimas e os líquidos iônicos são apresentadas para se entender o porquê de uma melhora na atividade catalítica de lipases quando estes biocatalisadores são suportados neste meio iônico. Exemplos selecionados da literatura científica atual são descritos para exemplificar o poder e a perspectiva desta combinação tão promissora para a síntese de um biodiesel limpo.Palavras-chave: Biodiesel; enzimas; líquidos iônicos.

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Section: Dupont E Colaboradoresunclassified

Enzymes and Ionic Liquids: a Promising Combination Towards a Clean Biodiesel

Medeiros¹,

Gonçalves²,

Rodrigues³

et al. 2013

Revista Virtual De Química

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“…Indeed, nowadays the oil cost is up to 80% of the total production cost of the biofuels. 1 On the other hand, the production costs could be dramatically decreased using low-grade raw material, such as: acid stocks produced during physical neutralization of fats and oils; domestic or industrial sludge; poultry, porcine or cattle slaughterhouse wastes; 1 algae bioreactors; 16 or nonedible oils, such as from palm-trees 17 or jatropha 18 species. Besides, these low cost fatty materials would address the so called trilemma food/energy/environmental, which has recently being discussed in important publications.…”

Section: Motivation: Why To Develop a Biodiesel Alternative Productiomentioning

confidence: 99%

Development of a lewis-based catalytic system for biodiesel production: from a batch laboratory scale to a continuous pilot plant

Suarez¹,

Silva²

2012

J. Braz. Chem. Soc.

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O desenvolvimento de um processo ou produto industrial envolve diferentes passos: (i) identificar a necessidade de um novo produto ou processo; (ii) pesquisar no laboratório, em escala de vidraria, um caminho que leve ao produto ou processo desejado; (iii) construir uma planta piloto em escala de laboratório; (iv) scale up uma ou mais vezes a planta piloto; (v) construir e iniciar a produção industrial. Do início de 2002 até o fim de 2011, o Laboratório de Materiais e Combustíveis (Instituto de Química, Universidade de Brasília) dedicou-se ao desenvolvimento de um processo alternativo para produzir biodiesel. O objetivo deste trabalho é descrever todo este desenvolvimento, a fim de mostrar o longo caminho para se construir uma planta piloto em escala de laboratório.The development of an industrial process or product involves different steps: (i) identify the necessity of a new product or process; (ii) research in glassware scale to find a way that leads to the desired product or process; (iii) build up and optimize a laboratory pilot plant; (iv) scale up one or more times the pilot plant; (v) build up an industrial plant and start up a commercial production. From the beginning of 2002 to the end of 2011, the Laboratory of Materials and Fuels (Institute of Chemistry, University of Brasília) has focused in the development of an alternative process to produce biodiesel. The aim of this account paper is to describe all this development in order to show the long way to achieve a laboratory pilot plant scale.

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“…They include fatty acid ethyl esters (FAEE), bioethanol, biomethane, jet fuel, biohydrogen, and thermochemical conversion products such as bio-oil, biocrude, and syngas. 9 Different catalysts have been reported in literature for the production of biodiesel from microalgae biomass, including metal oxides, 10 enzymes, 11,12 and homogeneous catalysts. 13 Moreover, biodiesel production by enzymatic catalysis has several advantages, such as low energy consumption, mild reaction condition, low environmental impact, and high capacity of reuse.…”

Section: Introductionmentioning

confidence: 99%

FATTY ACID ETHYL ESTERS FROM MICROALGAE OF Scenedesmus ecornis BY ENZYMATIC AND ACID CATALYSIS

Almeida¹,

Araújo²,

Florentino³

et al. 2017

Quim. Nova

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Microalgae are an indispensable food source for the various growth stages of mollusks, crustaceans, and several fish species. Using a microalgae biomass present in the Amazonian ecosystem (Macapá-AP), we study extraction methods for fatty acid such as solvent extraction (magnetic stirring and/or Soxhlet) and/or hydrolysis (acid and/or enzymatic catalysis) followed by esterification and/or direct transesterification. Extraction of crude triacylglycerides by mechanical stirring at room temperature was more efficient than continuous reflux (Soxhlet). Subsequently, the lipid extract was subject to transesterification with ethanol and CAL-B as a biocatalyst, leading to production of fatty acid ethyl esters (FAEE). Additionally, FAEEs were prepared by hydrolysis of crude triacylglycerides followed by acid-mediated esterification or enzymatic catalysis (lipase). In this case, the type of catalyst did not significantly influence FAEE yields. In the lipid extract, we identified palmitic, linoleic, oleic, and stearic acids with palmitic acid being the most abundant. Our results suggest that enzymatic catalysis is a viable method for the extraction of lipids in the microalga, Scenedesmus ecornis.

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Algae biodiesel: a promise or the future?

Cited by 8 publications

References 3 publications

Enzymes and Ionic Liquids: a Promising Combination Towards a Clean Biodiesel

Enzymes and Ionic Liquids: a Promising Combination Towards a Clean Biodiesel

Development of a lewis-based catalytic system for biodiesel production: from a batch laboratory scale to a continuous pilot plant

FATTY ACID ETHYL ESTERS FROM MICROALGAE OF Scenedesmus ecornis BY ENZYMATIC AND ACID CATALYSIS

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