Efficient KF loaded on MgCaAl hydrotalcite-like compounds in the transesterification of Jatropha curcas oil

Ariel Guzmán-Vargas, Teresa Santos-Gutiérrez, Enrique Lima, Jorge L. Flores-Moreno, Miguel A. Oliver-Tolentino, María De J. Martínez-Ortiz

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

© 2015 Elsevier B.V. All rights reserved. In this work a series of MgCaAl hydrotalcite-like compounds were synthetized by coprecipitation method at constant pH. In order to obtain the catalysts, the samples were modified with KF by incipient wetness impregnation at different wt%, after that, they were dried and calcined to obtain the mixed oxides. The effect of divalent cations ratio and KF load were studied in the transesterification reaction of Jatropha curcas oil to obtain biodiesel employing an inedible oil. XRD analysis showed typical diffraction patterns of LDH, by nitrogen physisorption the LDH mesoporous structure was also confirmed, 27Al NMR spectra showed bands at 10 and 88 ppm attributed to the Al coordination before and after thermal treatment. While for the impregnated samples after calcination the profiles exhibited the mixed oxide formation, in addition, another peaks appeared associated to the formation of various fluorinated species as shown by XRD, additionally, 19F NMR showed a main signal at -180 ppm indicating the presence of active tetrahedral aluminum fluoride species. The reaction evolution was monitoring calculating the oil conversion to biodiesel by integration of the signal spectra using 1H NMR spectroscopy. The results of catalytic tests in transesterification reaction showed a direct correlation between Mg/Ca ratio and KF content in the oil conversion to biodiesel, the higher conversion was achieved (90%) when Mg/Ca = 1 and KF load was 30 wt%.
Original languageAmerican English
Pages (from-to)S159-S164
Number of pages0
JournalJournal of Alloys and Compounds
DOIs
StatePublished - 14 Jun 2015
Externally publishedYes

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hydrotalcite
Jatropha
Transesterification
Biofuels
Oils
Biodiesel
Oxides
Nuclear magnetic resonance
Physisorption
Divalent Cations
Coprecipitation
Impregnation
Calcination
Diffraction patterns
Nuclear magnetic resonance spectroscopy
Magnetic Resonance Spectroscopy
Nitrogen
Hot Temperature
Positive ions
Heat treatment

Cite this

Guzmán-Vargas, Ariel ; Santos-Gutiérrez, Teresa ; Lima, Enrique ; Flores-Moreno, Jorge L. ; Oliver-Tolentino, Miguel A. ; Martínez-Ortiz, María De J. / Efficient KF loaded on MgCaAl hydrotalcite-like compounds in the transesterification of Jatropha curcas oil. In: Journal of Alloys and Compounds. 2015 ; pp. S159-S164.
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abstract = "{\circledC} 2015 Elsevier B.V. All rights reserved. In this work a series of MgCaAl hydrotalcite-like compounds were synthetized by coprecipitation method at constant pH. In order to obtain the catalysts, the samples were modified with KF by incipient wetness impregnation at different wt{\%}, after that, they were dried and calcined to obtain the mixed oxides. The effect of divalent cations ratio and KF load were studied in the transesterification reaction of Jatropha curcas oil to obtain biodiesel employing an inedible oil. XRD analysis showed typical diffraction patterns of LDH, by nitrogen physisorption the LDH mesoporous structure was also confirmed, 27Al NMR spectra showed bands at 10 and 88 ppm attributed to the Al coordination before and after thermal treatment. While for the impregnated samples after calcination the profiles exhibited the mixed oxide formation, in addition, another peaks appeared associated to the formation of various fluorinated species as shown by XRD, additionally, 19F NMR showed a main signal at -180 ppm indicating the presence of active tetrahedral aluminum fluoride species. The reaction evolution was monitoring calculating the oil conversion to biodiesel by integration of the signal spectra using 1H NMR spectroscopy. The results of catalytic tests in transesterification reaction showed a direct correlation between Mg/Ca ratio and KF content in the oil conversion to biodiesel, the higher conversion was achieved (90{\%}) when Mg/Ca = 1 and KF load was 30 wt{\%}.",
author = "Ariel Guzm{\'a}n-Vargas and Teresa Santos-Guti{\'e}rrez and Enrique Lima and Flores-Moreno, {Jorge L.} and Oliver-Tolentino, {Miguel A.} and Mart{\'i}nez-Ortiz, {Mar{\'i}a De J.}",
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Efficient KF loaded on MgCaAl hydrotalcite-like compounds in the transesterification of Jatropha curcas oil. / Guzmán-Vargas, Ariel; Santos-Gutiérrez, Teresa; Lima, Enrique; Flores-Moreno, Jorge L.; Oliver-Tolentino, Miguel A.; Martínez-Ortiz, María De J.

In: Journal of Alloys and Compounds, 14.06.2015, p. S159-S164.

Research output: Contribution to journalArticle

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T1 - Efficient KF loaded on MgCaAl hydrotalcite-like compounds in the transesterification of Jatropha curcas oil

AU - Guzmán-Vargas, Ariel

AU - Santos-Gutiérrez, Teresa

AU - Lima, Enrique

AU - Flores-Moreno, Jorge L.

AU - Oliver-Tolentino, Miguel A.

AU - Martínez-Ortiz, María De J.

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N2 - © 2015 Elsevier B.V. All rights reserved. In this work a series of MgCaAl hydrotalcite-like compounds were synthetized by coprecipitation method at constant pH. In order to obtain the catalysts, the samples were modified with KF by incipient wetness impregnation at different wt%, after that, they were dried and calcined to obtain the mixed oxides. The effect of divalent cations ratio and KF load were studied in the transesterification reaction of Jatropha curcas oil to obtain biodiesel employing an inedible oil. XRD analysis showed typical diffraction patterns of LDH, by nitrogen physisorption the LDH mesoporous structure was also confirmed, 27Al NMR spectra showed bands at 10 and 88 ppm attributed to the Al coordination before and after thermal treatment. While for the impregnated samples after calcination the profiles exhibited the mixed oxide formation, in addition, another peaks appeared associated to the formation of various fluorinated species as shown by XRD, additionally, 19F NMR showed a main signal at -180 ppm indicating the presence of active tetrahedral aluminum fluoride species. The reaction evolution was monitoring calculating the oil conversion to biodiesel by integration of the signal spectra using 1H NMR spectroscopy. The results of catalytic tests in transesterification reaction showed a direct correlation between Mg/Ca ratio and KF content in the oil conversion to biodiesel, the higher conversion was achieved (90%) when Mg/Ca = 1 and KF load was 30 wt%.

AB - © 2015 Elsevier B.V. All rights reserved. In this work a series of MgCaAl hydrotalcite-like compounds were synthetized by coprecipitation method at constant pH. In order to obtain the catalysts, the samples were modified with KF by incipient wetness impregnation at different wt%, after that, they were dried and calcined to obtain the mixed oxides. The effect of divalent cations ratio and KF load were studied in the transesterification reaction of Jatropha curcas oil to obtain biodiesel employing an inedible oil. XRD analysis showed typical diffraction patterns of LDH, by nitrogen physisorption the LDH mesoporous structure was also confirmed, 27Al NMR spectra showed bands at 10 and 88 ppm attributed to the Al coordination before and after thermal treatment. While for the impregnated samples after calcination the profiles exhibited the mixed oxide formation, in addition, another peaks appeared associated to the formation of various fluorinated species as shown by XRD, additionally, 19F NMR showed a main signal at -180 ppm indicating the presence of active tetrahedral aluminum fluoride species. The reaction evolution was monitoring calculating the oil conversion to biodiesel by integration of the signal spectra using 1H NMR spectroscopy. The results of catalytic tests in transesterification reaction showed a direct correlation between Mg/Ca ratio and KF content in the oil conversion to biodiesel, the higher conversion was achieved (90%) when Mg/Ca = 1 and KF load was 30 wt%.

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