New metal catalysts for soybean oil transesterification

Abreu, Frederique R.; Lima, Daniela G.; Hamú, Elias H.; Einloft, Sandra; Rubim, Joel C.; Suarez, Paulo A. Z.

doi:10.1007/s11746-003-0745-6

Cited by 105 publications

(75 citation statements)

References 13 publications

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“…The results show that all solids are active for the methanolysis reaction (see entries [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Nonetheless, the most active catalyst using comparable conditions is the Nb 2 O 5 /H 3 PO 4 .…”

Section: Transesterification Resultsmentioning

confidence: 99%

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Synthesis, characterization and use of Nb2O5 based catalysts in producing biofuels by transesterification, esterification and pyrolysis

Brandão¹,

Quirino²,

Mello³

et al. 2009

J. Braz. Chem. Soc.

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2 O have been investigated as catalysts for the transesterification, esterification and pyrolysis of vegetable oils. The compounds were characterized by thermal analysis (DTA-TGA), spectroscopy (DRX, FT-IR and FT-Raman), surface area (BET) and the acidity (Ho) determined by n-butylamine titration using the Hammet´s indicator method. It was observed that after the acid treatment both the surface area and the acidity decreased as compared to the starting Nb 2 O 5 •xH 2 O. The only exception was a higher acidity verified when nitric acid was used. Among the catalyst investigated, the Nb 2 O 5 /H 3 PO 4 presented the highest activity in the alcoholysis of soybean oil with different mono-alcohols (methanol, ethanol, 2-propanol, n-butanol

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Section: Transesterification Resultsmentioning

confidence: 99%

“…[1][2][3][4][5] In this context, the use of derivatives from triglycerides and fatty acids such as methyl-or ethyl fatty acid esters and hydrocarbons has received special attention as alternative fuels for diesel engines. [6][7][8] The main studied processes to obtain biofuels from triglycerides and fatty acids are depicted in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and use of Nb2O5 based catalysts in producing biofuels by transesterification, esterification and pyrolysis

Brandão¹,

Quirino²,

Mello³

et al. 2009

J. Braz. Chem. Soc.

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“…In these studies, a rate enhancement was observed with the increased amounts of catalyst, and ester yield went from 72.7 to 95.0% as the catalyst load was increased from 1 to 5 wt%. reactions was achieved by Abreu and coworkers [11,27,28]. Those authors described the use of coordination compounds with pyrone ligand (3-hydroxy-2-methyl-4-pyrone) and divalent metal cations (M = Sn(II), Pb(II), Zn(II), and Hg(II), as catalysts in oil vegetable transesterification with methyl alcohol.…”

Section: Brønsted Acid-catalyzed Transterification Reactionsmentioning

confidence: 99%

“…Those authors described the use of coordination compounds with pyrone ligand (3-hydroxy-2-methyl-4-pyrone) and divalent metal cations (M = Sn(II), Pb(II), Zn(II), and Hg(II), as catalysts in oil vegetable transesterification with methyl alcohol. These complexes can be obtained from the reaction of the pyrone ligand with metal halide in presence of NaOH (Figure 9), as was described firstly by Abreu and coworkers [11,27,28]. The activity of metal complexes catalysts was compared with the activity of others homogeneous catalysts traditionally used in transesterification reactions (NaOH and H 2 SO 4 ).…”

Section: Brønsted Acid-catalyzed Transterification Reactionsmentioning

confidence: 99%

Tin-Catalyzed Esterification and Transesterification Reactions: A Review

Ferreira

Cardoso

Silva

2012

ISRN Renewable Energy

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The recent increase in the world biofuels demand, along with the need to reduce costs while improving the environmental sustainability of the biodiesel production, have led to the search for catalysts that should be economically viable, efficient, and environmentally friendly. This paper reviews recent research and development of organic and inorganic tin catalysts; focusing on kinetic properties and catalytic activity in two key reactions for biodiesel production: free fatty acids (FFA) esterification and triglycerides (TG) transesterification. First the basic knowledge of homogeneous tin catalysts in esterification reactions of different carboxylic acids is provided. Second, main advances obtained in the study of FFA esterification reactions catalyzed by tin chloride are covered. The effect of the principal parameters of reaction on the yield and rate of alkyl esters production is described. Kinetic measurements allowed the determination of the activation energy (46.79 kJ mol −1 ) and a first-order dependence in relation to both FFA and tin chloride catalyst concentration. Aspects related to recycling of the tin chloride catalyst in phase homogeneous are discussed. Third the advances obtained in the development of homogeneous catalysts based on tin complexes in transesterification reactions are summarized. Finally, results obtained from the use of tin organometallics compounds in reactions of vegetable oils transesterification reactions are concisely presented. The optimization of processes catalytic homogeneous utilized in the transesterification reactions can contribute to the improvement of the technology biodiesel production.

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“…28 The reactions were carried out in simple glassware apparatus composed of a 50 mL two-neck round botton flask with a Allihn condenser. The reaction mixtures were kept under gentle reflux (approximately 60 °C) and magnetic stirring for a desired time.…”

Section: Getting Started: Screening Lewis Acid Metal Complexes In Hommentioning

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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New metal catalysts for soybean oil transesterification

Cited by 105 publications

References 13 publications

Synthesis, characterization and use of Nb2O5 based catalysts in producing biofuels by transesterification, esterification and pyrolysis

Synthesis, characterization and use of Nb2O5 based catalysts in producing biofuels by transesterification, esterification and pyrolysis

Tin-Catalyzed Esterification and Transesterification Reactions: A Review

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

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