Multivariate Method for Transesterification Reaction of Soybean Oil Using Calcined Mg–Al Layered Double Hydroxide as Catalyst

Prado, Roberta Gomes; Almeida, Gilsélia D.; Carvalho, Mariana Machado de Oliveira; Galvão, Luan M.; Bejan, Claudia Cristina Cardoso; Costa, Liovando Marciano da; Pinto, Francisco de Assis de Carvalho; Tronto, Jairo; Pasa, Vânya Márcia Duarte

doi:10.1007/s10562-014-1252-2

Cited by 12 publications

(3 citation statements)

References 41 publications

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“…The third step is associated with an endothermic process comprising the nitrate decomposition to NO 2 ( m / z = 46). At temperatures above 700 °C, there is no weight loss, and the formation of mixed oxides of Mg and Al is reported. , The MS curve shows the release of a low amount of CO 2 ( m / z = 44) that can be attributed to carbon dioxide adsorbed on the external surface of the LDH-NO 3 particles.…”

Section: Resultsmentioning

confidence: 94%

Layered Double Hydroxides: New Technology in Phosphate Fertilizers Based on Nanostructured Materials

Benício

Constantino

Pinto

et al. 2016

ACS Sustainable Chem. Eng.

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130

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Layered Double Hydroxide (LDH) intercalated with phosphate ions (LDH-phosphate) was synthesized by ionexchange method from a precursor containing nitrate ions between the layers. The materials were characterized by X-ray diffraction (XRD), attenuated total reflectance−Fourier transform infrared spectroscopy (ATR-FTIR), thermogravimetric analysis coupled to differential scanning calorimetry and mass spectrometry (TGA-DSC-MS), specific surface area (BET), scanning electron microscopy (SEM), and elemental analysis. We hypothesized that LDH-phosphate can be used as a slow release fertilizer and help increase phosphate fertilization efficiency in tropical weathered soils. This new fertilizer technology was tested in a kinetic study of P release and a bioassay with controlled conditions of light, humidity, and temperature using maize (Zea mays) as our indicator plant. The bioassay was performed using an adaptation of the Neubauer method, wherein the LDHphosphate was compared to the commercial triple superphosphate (TSP) fertilizer in two different weathered soils: a sandy soil and a clayey soil. Under the bioassay experimental conditions, LDH-phosphate increased plant productivity (mass of dry matter), height, and the content of phosphorus (P) in the dry matter. In addition, LDH-phosphate promoted an increase in the soil pH value, contributing to decrease the P adsorption capacity of the soil, making it more available to the plants.

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Section: Resultsmentioning

confidence: 94%

Layered Double Hydroxides: New Technology in Phosphate Fertilizers Based on Nanostructured Materials

Benício

Constantino

Pinto

et al. 2016

ACS Sustainable Chem. Eng.

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130

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“…It is clearly seen that high ester yields have been reported for Mg-Al mixed oxide catalysts already at 65°C and low [47,48] or higher [49,50] methanol to oil ratio. It should be mentioned that we were not able to achieve such activity at such low reaction temperature.…”

Section: Transesterification Of Rapeseed Oilmentioning

confidence: 92%

Transesterification of rapeseed oil by Mg–Al mixed oxides with various Mg/Al molar ratio

Hájek

Kutálek

Smoláková

et al. 2015

Chemical Engineering Journal

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“…Prado et al synthesized LDHs with composition Mg R Al-CO 3 with a Mg/Al molar ratio ranging from 2 to 6. The LDHs were calcined and used as catalysts in the transesterification reaction of soybean oil for biodiesel production.…”

Section: Introductionmentioning

confidence: 99%

Ethanolysis and Methanolysis of Soybean and Macauba Oils Catalyzed by Mixed Oxide Ca–Al from Hydrocalumite for Biodiesel Production

et al. 2016

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In this study, Ca–Al mixed oxide produced from the thermal decomposition of a synthetic hydrocalumite was prepared and evaluated as a catalyst in the transesterification reaction for biodiesel production, using the following reagents: refined soybean oil, crude macauba kernel oil, methanol, and ethanol. The synthetic hydrocalumite and the mixed oxide were characterized by powder X-ray diffraction, thermogravimetry–differential scanning calorimetry coupled with mass spectrometry, specific surface area measurement, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and temperature-programmed desorption of CO2. The catalytic tests indicated that the reactions using methanol exhibited more favorable activity than those employing ethanol, regardless of the type of oil used (soybean or macauba). Ethanolysis produced better results for the higher-molar-mass oil (soybean), because of the effect of the ethanol cosolvent. The catalyst was efficient for transesterification, with conversions of 97% and 95% for soybean and macauba oil, respectively, after 1.5 h of reaction, under atmospheric pressure condition and reflux temperature.

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Multivariate Method for Transesterification Reaction of Soybean Oil Using Calcined Mg–Al Layered Double Hydroxide as Catalyst

Cited by 12 publications

References 41 publications

Layered Double Hydroxides: New Technology in Phosphate Fertilizers Based on Nanostructured Materials

Layered Double Hydroxides: New Technology in Phosphate Fertilizers Based on Nanostructured Materials

Transesterification of rapeseed oil by Mg–Al mixed oxides with various Mg/Al molar ratio

Ethanolysis and Methanolysis of Soybean and Macauba Oils Catalyzed by Mixed Oxide Ca–Al from Hydrocalumite for Biodiesel Production

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