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.; Martı́nez-Ortiz, Marı́a de Jesús

doi:10.1016/j.jallcom.2015.01.029

Cited by 21 publications

(10 citation statements)

References 42 publications

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“…The vibration around 1630 cm –1 can be assigned to the bending vibration mode of HO–H that usually exists in interlayer water molecules . The peak at 1360 cm –1 is attributable to CO 3 2– by the incorporation of CO 2 during the reaction period . The spectral band at 1063 cm –1 also corresponded to interlayer carbonate .…”

Section: Resultsmentioning

confidence: 96%

Effect of Natural Organic Matter Model Compounds on the Structure Memory Effect of Different Layered Double Hydroxides

Zhao

et al. 2019

ACS Earth Space Chem.

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The structural transformation of layered double hydroxides (LDHs) plays an important role in a variety of natural environmental behaviors. As one of the important ways of structure transformation in LDHs, the structure memory effect closely interacted with humic acid (HA). However, the role of functional groups in HA is unclear because its structure is relatively complex. Therefore, seven representative small molecules of single or double aromatic compounds were selected to explore their influence on the regeneration of different LDHs, thereby revealing key function groups in HA. As a result, ortho-benzene compounds could more effectively affect the regeneration of LDHs than other model compounds. For these compounds, the aliphatic chain length and aromatic ring size have little effect on regeneration of LDHs. However, increasing the number of carboxyl or hydroxyl groups affected the results, although all of them accelerated the regeneration rate of LDHs. Additionally, LDHs during the regeneration have a positive adsorption effect on both o-carboxyl and o-hydroxyl aromatic compounds; however, they have shown different effects on the regeneration of LDHs. Phthalic acid revealed no effect on the structure and crystallinity of regenerated LDH, while catechol inhibited the regeneration process and decreased the crystallinity of regenerated LDHs. The effects of o-hydroxyl aromatic compounds, such as catechol, are also dependent upon the type of LDHs. They have an inhibitory effect on the crystallinity of the regenerated Mg−LDH within a short time or with a high concentration but have no effect on its morphology. Although o-hydroxyl aromatic compounds have no effect on the crystallinity of regenerated Ca−LDH, the crystal growth was suppressed. This is due to the difference in the regeneration processes between two LDHs. These results provide a more detailed theoretical basis for understanding the influence of HA on the structural transformation of LDHs or even other minerals, such as hydroxides, in the environment.

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Section: Resultsmentioning

confidence: 96%

Effect of Natural Organic Matter Model Compounds on the Structure Memory Effect of Different Layered Double Hydroxides

Zhao

et al. 2019

ACS Earth Space Chem.

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“…Transesterification of JCO was carried out by KF loaded on MgCaAl hydrotalcite to get biodiesel. Highest conversion of 90% was attained while KF loading was 30 wt% with equal percentage of Mg to Ca 15 …”

Section: Introductionmentioning

confidence: 98%

“…The transesterification conditions were studied to decide the optimal conditions by Sr 2 + -CaO/MgO. 13 15 However, a lot of catalytic transesterification was done previously, but still efficient catalyst has to be needed to achieve the desired results. Practically, catalysts have been shown good activity in the feedstocks containing low free fatty acids (FFA), but these catalysts almost failed in high FFA feedstocks.…”

Section: Introductionmentioning

confidence: 99%

Production of biodiesel from high free fatty acids content Jatropha curcas oil using environment affable K–Mg composite catalyst

Sahu

Saha

Datta

et al. 2021

Asia-Pacific J Chem Eng

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Worldwide chemical industries are concerned towards pollution‐free and green processes. In this regard, alternative energy resource having minimal pollutant and toxins emission would be preferred. Jatropha curcas (JCO) is one of the important and alternative feedstock for biodiesel production. In the present work, JCO with higher (5.5%) free fatty acid (FFA) was used for transesterification using K–Mg composite catalyst. It found that 1:2 ratio of K/Mg was the best combination for efficient conversion of JCO to corresponding methyl esters. Physico‐chemical characterization of this novel catalyst exhibited improved surface area with adequate porosity as well as basicity helping its exceptional catalytic activity. Under optimum condition, 99.5% conversion was achieved using 10:1 ratio of methanol to JCO for 3 h at 70°C using 6 wt% of catalyst. This catalyst was truly heterogeneous in nature and almost retained its activity for subsequent re‐using for next five batches. The developed catalyst is highly efficient and greener in terms of lesser leaching behaviour and retaining the basic catalytic sites in the course of transesterification. The fuel properties of the biodiesel are fully complied with ASTM protocols; thus, research findings are significant to fulfil the demand of biodiesel in present scenario.

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“…Potassium Fluoride (KF) is an alkaline halide molecule with an active and reactive F (fluorine) element, making it easier to rebound with metals. An increase in its effects leads to a higher catalyst activity [1][2][3][4][5]. However, when it is added in surplus, it decreases the catalyst activity.…”

Section: Introductionmentioning

confidence: 99%

“…The relation between each operating variables and the responses is shown in Equation(1). Y = 1.05699 + 0.13766 X1 -0.21133 X12 + 0.07788 X2 -0.02041 X22 + 0.12708 X2 -0.02395 X32 -0.0775 X1X2-0.0225 X1X3 + 0.0675 X2X3 + 0.0675 X2X3(1)…”

mentioning

confidence: 99%

Basicity Optimization of KF/Ca-MgO Catalyst using Impregnation Method

Anggoro

Buchori

Sasongko

et al. 2019

Bull. Chem. React. Eng. Catal.

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This research aimed at determining the optimum value between calcination temperature (X1), calcination time (X2) and %wt KF (X3) toward optimum basicity of KF/Ca-MgO catalyst. Approximately 2-4%wt KF was added to the KF/Ca-MgO catalyst using the impregnation method to assist the Ca-MgO, at 450-550 ºC and a calcination time of 2-4 hours. Furthermore, its basicity was analyzed using Tanabe's titration method. The use of Variance Analysis (ANOVA), indicated that calcination temperature (X1) factor achieved the highest basicity of KF/Ca-MgO catalyst, as indicated by its high F-value (16.46262) and low p-value (0.0067). The correlation between each operating variables and the responses were shown in a mathematical equation. The optimization value is estimated by limiting the calcination temperature from 415.9 to 584.1 ºC, with a calcination time ranging from 1.32 to 4.68 hours, and %wt KF of 1.3182 to 4.6818 % that obtained 1.18 mmol/g for the optimal catalyst basicity. Copyright © 2019 BCREC Group. All rights reserved

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

Cited by 21 publications

References 42 publications

Effect of Natural Organic Matter Model Compounds on the Structure Memory Effect of Different Layered Double Hydroxides

Effect of Natural Organic Matter Model Compounds on the Structure Memory Effect of Different Layered Double Hydroxides

Production of biodiesel from high free fatty acids content Jatropha curcas oil using environment affable K–Mg composite catalyst

Basicity Optimization of KF/Ca-MgO Catalyst using Impregnation Method

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