Biodiesel production from triolein and short chain alcohols through biocatalysis

Salis, Andrea; Pinna, Marcella; Monduzzi, Maura; Solinas, V.

doi:10.1016/j.jbiotec.2005.04.009

Cited by 231 publications

(135 citation statements)

References 24 publications

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“…Methanol is widely used, but severe methanol inhibition, compared to other alcohols, typically lower enzyme Belafibako et al (2002) performance (Chen and Wu, 2003;Salis et al, 2005;Shimada et al, 1999). Inhibition of C. antarctica (Novozym 435) by methanol was also reported by Shimada et al (1999) to give irreversible loss in activity.…”

Section: Acyl Acceptorsmentioning

confidence: 99%

A review of the current state of biodiesel production using enzymatic transesterification

Fjerbæk

Christensen

Norddahl

2009

Biotech & Bioengineering

662

459

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Enzymatic biodiesel production has been investigated intensively, but is presently employed industrially only in a 20,000 tons/year pilot plant in China (Du et al. [2008] Appl Microbiol Technol 79(3):331-337). This review presents a critical analysis of the current status of research in this area and accentuates the main obstacles to the widespread use of enzymes for commercial biodiesel transesterification. Improved results for enzymatic catalysis are seen with respect to increased yield, reaction time and stability, but the performance and price of the enzymes need further advances for them to become attractive industrially for biodiesel production. Critical aspects such as mass transfer limitations, use of solvents and water activity are discussed together with process considerations and evaluation of possible reactor configurations, if industrial production with enzymes is to be carried out. Results of published studies on the productivity of enzymes are also presented and compared to the use of chemical catalysts.

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Section: Acyl Acceptorsmentioning

confidence: 99%

A review of the current state of biodiesel production using enzymatic transesterification

Fjerbæk

Christensen

Norddahl

2009

Biotech & Bioengineering

662

459

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“…These include the removal of inorganic salts from the products, the recovery of glycerol, dehydration, and the treatment of alkaline wastewater [3,4]. The use of lipase-catalyzed transesterification reactions in low-water media has been pursued recently as a promising approach to overcoming these problems [3,5]. It was expected that the application of lipases could afford high conversion yields of oils and simplify downstream product purification at the same time [6,7].…”

mentioning

confidence: 99%

“…Several recently reported works have examined the influence of water on the transesterification activities of lipases. According to these works, a water content of at least 0.48% (wt) is required to activate the enzymes [5,[8][9][10]. That is about ten times of the allowed 0.05% water content for biodiesel in the USA [11].…”

mentioning

confidence: 99%

An Organic Soluble Lipase for Water-Free Synthesis of Biodiesel

Zhao

El‐Zahab

Brosnahan

et al. 2007

Appl Biochem Biotechnol

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Lipase AK was modified with short alkyl chains to form a highly organic soluble enzyme and was used to catalyze the synthesis of biodiesel from soybean oil in organic media. The effects of several key factors including water content, temperature, and solvent were examined for the solubilized enzyme in comparison with several other commercially available lipases. Whereas native lipases showed no activity in the absence of water, the organic soluble lipase demonstrated reaction rates of up to 33 g-product/genzyme h. The biocatalyst remains soluble in the biodiesel product, and therefore, there is no need to be removed because it is expected to be burned along with the diesel in combustion engines. This provides a promising one-pot mix-and-use strategy for biodiesel production.

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“…Segundo alguns trabalhos, um conteúdo de água mínimo de 0,48% em peso é necessário para promover a ativação das enzimas, [173][174][175][176] em função da formação de gotas água-óleo que aumentam a área interfacial disponível. Por isso alguns trabalhos propõem a adição de água para ativar a enzima.…”

Section: Catálise Heterogênea áCida E Alcalinaunclassified

Biodiesel: visão crítica do status atual e perspectivas na academia e na indústria

Dabdoub¹,

Bronzel²,

Rampin³

2009

Quím. Nova

103

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Recebido em 27/2/09; aceito em 31/3/09; publicado na web em 7/4/09 BioDiESEL: A CRiTiCAL oVERViEW oN THE CURRENT STATUS AND PERSPECTiVES AT THE ACADEmY AND iNDUSTRY. This article presents a bibliographic review of research carried out on different alternative processes for biodiesel production. The supercritical and subcritical (non catalytic) reaction conditions, the use of solid basic, solid acid and other heterogeneous catalysts, including the use of immobilized enzymes and whole-cell catalysts are also critically compared with the traditional homogeneous alkaline or acid catalysts that are common on industrial applications. Advantages and limitations of all these processes for the transference from the laboratory to the industry are discussed. A correlation of the chemical composition with the quality parameters of the produced biodiesel is done with aim to stablish adequate procedures for the right selection of the rawmaterial. Castor bean oil is used as an example of inappropriate oil in order to produce a B100 that fulfill all the international physicochemical quality standards. in this article are presented research results to adequate the values of viscosity, density and iodine number of the castor and soybean biodiesel to the international standard limits by means blending these both biodiesels at the right ratio.Keywords: transesterification; biodiesel; catalysts. introduÇãoAumento da demanda mundial por combustíveis líquidos, aquecimento global, segurança energética, vontade política por desenvolvimento nos campos agrícola, social e também energético são pontos que abrem novas áreas de interesse e oportunidades para pesquisas e desenvolvimento na Academia e na indústria, pois são as forças motoras responsáveis pelo renovado interesse na produção de biocombustíveis.Um dos grandes destaques da atualidade na área de biocombustí-veis é o interesse pelo uso de recursos naturais baseados em materiais lignocelulósicos 1-3 para a produção de etanol ou por fontes produtoras de lipídeos usados para a produção de biodiesel.Biodiesel é o nome dado a ésteres alquílicos de ácidos graxos desde que atendam certos parâmetros de qualidade. 4-8 Além de esses ésteres serem derivados de fontes biológicas como plantas e animais, atuam como combustível substituto ao diesel de petróleo, com desempenho muito próximo, não exigindo modificações nos motores. Tradicionalmente o biodiesel é produzido através das reações de transesterificação de triglicerídeos, usando geralmente catalisadores alcalinos, 9 ou da esterificação de ácidos graxos livres, sendo que neste último caso, os ácidos graxos livres (AGLs) são submetidos à reação direta com um álcool de 4 carbonos ou menos, na presença de catalisadores ácidos. 10-12 mais recentemente o uso de diversos catalisadores heterogêneos tem sido descrito na literatura. 13 Transesterificação é o processo de transformação de um éster carboxílico em outro, através da troca do grupo Ro -presente no éster original, por outro grupo semelhante proveniente de um álcool na presença de um catalisa...

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Biodiesel production from triolein and short chain alcohols through biocatalysis

Cited by 231 publications

References 24 publications

A review of the current state of biodiesel production using enzymatic transesterification

A review of the current state of biodiesel production using enzymatic transesterification

An Organic Soluble Lipase for Water-Free Synthesis of Biodiesel

Biodiesel: visão crítica do status atual e perspectivas na academia e na indústria

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