Cadmium and Tin Magnetic Nanocatalysts Useful for Biodiesel Production

Alves, Melquizedeque B.; Medeiros, Fernando C. M.; Rubim, Joel C.; Suarez, Paulo A. Z.

doi:10.5935/0103-5053.20140238

Cited by 12 publications

(11 citation statements)

References 1 publication

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“…Hydrolysis has been a very attractive alternative production approach for the industry, since hydrolysis uses sub-and supercritical fluids (such as water and carbon dioxide), which reduces the use of organic solvents, being a great advantage in any process [21]. The hydrolysis can occur in non-catalytic processes [16,[22][23][24][25][26] and as reaction catalyzed by enzymes [27][28][29][30][31] and heterogeneous catalysts [18,20,32,33].…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Soybean Oil Hydrolysis on Niobium Catalysts

et al. 2020

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The catalytic hydrolysis of soybean oil was used as an alternative for the production of monoglycerides (MG) and diglycerides (DG). The reactions were conducted in a stainless-steel tubular reactor in the temperature range of 240-290°C, on niobium phosphate (NBP) and niobium oxide (NBO) as catalysts. In the hydrolysis reactions at 270°C, the maximum selectivities of the products of interest were obtained at 22 % MG and 48 % DG for the reaction with NBP, and 7 % MG and 33 % DG with NBO, for 59 % and 36 % of triglyceride conversion in 10 min, respectively. The proposed kinetic model presented a good fit of the theoretical model with the experimental data, showing that the previous hypotheses considered for the mechanism development are suitable for describing the kinetics of soybean oil hydrolysis.

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Section: Introductionmentioning

confidence: 99%

Kinetics of Soybean Oil Hydrolysis on Niobium Catalysts

et al. 2020

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“…However, few papers are published with these magnetic materials in transesterification reactions. Alves et al 10 developed magnetic catalysts of Fe/Sn and Fe/Cd and used in the transesterification of soybean oil where they reached maximum yield of 86% after 1 hour of reaction at 200 °C. Falcão et al 4 synthesized SrO/CoFe 2 O 4 as a catalyst for transesterification reaction of babassu oil and obtained 96% yield under optimum conditions.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Materials Enriched with Strontium: a Study of the use as Catalysts in the Transesterification Reaction of Babassu Oil

et al. 2019

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This work described a new magnetic material enriched with strontium as catalyst to produce babassu biodiesel. The use of magnetic materials has attracted attention due to easy and fast separation from reaction medium. Moreover, they are ecologically correct, due to they generate less discards to the environment. Techniques of analysis and characterization were carried out to check the synthesis of magnetite and strontium ferrite, besides to verify the presence of hydroxide and carbonate in the structure of the strontium oxide. The best catalytic activities presented conversions of 78.6% and 89.7% when using the catalysts SrO/Fe 3 O 4 and SrO/SrFe 2 O 4 , respectively. Density studies of the alkali active sites were performed to elucidate the best activity for the catalyst composed with SrFe 2 O 4 .

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“…Catalysts with magnetic properties have been studied in the biodiesel production [23][24][25][26][27][28][29][30][31]. However, information in the literature on the application of the magnetic properties of these catalysts is still scarce.…”

Section: Introductionmentioning

confidence: 99%

Extruded Catalysts with Magnetic Properties for Biodiesel Production

Silveira¹,

Justo

Pérez³

et al. 2018

Advances in Materials Science and Engineering

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The aim of this work was to evaluate the performance of different extruded catalysts containing K2CO3as active phase and adding convenientlyγ-Al2O3and/or sepiolite and magnetic particles on the biodiesel production from sunflower oil by the ethanolic route. Firstly, the content of the Fe3O4on the catalyst (0.1, 0.2, 0.3, and 0.4 g Fe3O4/g of K2CO3/γ-Al2O3), after calcination step, was evaluated to verify the separation facility of the catalysts with magnetic properties from reactional medium, using an external magnetic field, at the end of biodiesel synthesis. After that, three different catalysts were considered for comparative purposes: (a) K2CO3/γ-Al2O3; (b) K2CO3/γ-Al2O3/Fe3O4; (c) K2CO3/γ-Al2O3/Sepiolite/Fe3O4and subsequently characterized by dynamometry, TGA, SEM, VSM, BET, and XRD to determine their mechanical, structural, magnetic, and textural properties. However, their catalytic activities were determined through biodiesel production that was carried out in a glass volumetric reactor during 4 h, under magnetic stirring with 5% wt. of the catalyst and oil : ethanol molar ratio (1 : 12) at 80°C reaction temperature. The best result, i.e., around 88% of biodiesel conversion, was obtained with catalyst K2CO3/γ-Al2O3/Sepiolite/Fe3O4which showed also satisfactory textural and mechanical strength properties comparatively with the other catalytic derivatives. In addition, no agglomeration of the particles was observed during the reaction, and the magnetic property of this catalytic system was satisfactory for adequate separation from reactional medium seeking further reuse. The attained results are attractive for possible implementation at industrial scale and can be considered to mitigate drawbacks which resulting by using of homogeneous catalysts in the conventional processes.

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Cadmium and Tin Magnetic Nanocatalysts Useful for Biodiesel Production

Cited by 12 publications

References 1 publication

Kinetics of Soybean Oil Hydrolysis on Niobium Catalysts

Kinetics of Soybean Oil Hydrolysis on Niobium Catalysts

Magnetic Materials Enriched with Strontium: a Study of the use as Catalysts in the Transesterification Reaction of Babassu Oil

Extruded Catalysts with Magnetic Properties for Biodiesel Production

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