Kinetic study of oleic acid esterification over 12-tungstophosphoric acid catalyst anchored to different mesoporous silica supports

Patel, Anjali; Brahmkhatri, Varsha

doi:10.1016/j.fuproc.2013.03.022

Cited by 98 publications

(67 citation statements)

References 28 publications

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“…Table 2 contains the calculated rate constants for different reaction temperatures. The value of rate constants obtained are close to the values reported by other researchers 25,26 . The influence of temperature on specific reaction rate was determined by fitting k 1 to the Arrhenius equation,…”

Section: Kinetic Modelsupporting

confidence: 91%

“…This value is comparable to the activation energy in the range of 20.7 to 45.9 kJ mol -1 when calculated by first-order reaction kinetics [27][28][29] . For heterogeneous catalysts, the activation energy for esterification of different oils is generally higher 23,25,26,30 . By applying the Arrhenius equation to the values of slope and intercept of graphs, the temperature dependency of the constants can be correlated by the following equations:…”

Section: Kinetic Modelmentioning

confidence: 99%

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Esterification of High Free Fatty Acid Rice Bran Oil: Parametric and Kinetic Study

Arora

Toor

Wanchoo

2016

Chem. Biochem. Eng. Q.

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Section: Kinetic Modelsupporting

confidence: 91%

Section: Kinetic Modelmentioning

confidence: 99%

Esterification of High Free Fatty Acid Rice Bran Oil: Parametric and Kinetic Study

Arora

Toor

Wanchoo

2016

Chem. Biochem. Eng. Q.

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“…The slurry mixture was dried at 80°C for 16 h and then the resulting product was crushed and granulated using a mortar and a pestle. After grinding for about 10 min, the precursors were calcined in a muffle furnace at 500°C for 4 h. The obtained solid base was denoted by KCa/MMT-x (x = 10, 20,30,40,50), where x represents the mass percent of KF for the total amount of calcium oxide and MMT, and Ca/MMT was denoted as the sample without KF.…”

Section: Catalyst Preparationmentioning

confidence: 99%

Montmorillonite-supported KF/CaO: a new solid base catalyst for biodiesel production

Jia

Chen

et al. 2015

Res Chem Intermed

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Biodiesel is an alternative to petroleum-derived diesel fuel; development of a high-efficiency base catalyst to be used in heterogeneous biodiesel production is still a challenge. In this paper, a novel solid base catalyst, KF-and CaOsupported montmorillonite (KCa/MMT) was successfully synthesized by a facile impregnation method, and used for producing biodiesel in transesterification of commercial soybean oil with methanol. The catalysts were characterized by X-ray diffraction, carbon dioxide temperature-programmed desorption and scanning electron microscopy. Effects of the parameters, such as the loading amount of KF, the amount of KCa/MMT, and the methanol to oil molar ratios, on the yield of biodiesel were investigated. A maximum biodiesel yield of 98 % was obtained under the optimal reaction conditions. The separated catalyst can be directly used in the next round of reactions and gave a satisfactory yield. Furthermore, analysis of the catalyst's tolerance to oil-containing water or free fatty acids, and a kinetic study were also carried out. Koros-Nowak tests were designed and conducted, and it was proven that the heat and mass transfer were not limited by the reaction rate.

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“…Because of their multiple potential applications, straightforward recoverability and excellent properties, a wide range of recent studies on synthetic routes have been undertaken to fabricate surface modified nanoparticles in order to increase their surface acidity/basicity [8][9][10][11][12][13]. This is of particular significance in relation to nano-catalysts for biodiesel production involving the use of cheap raw materials containing free fatty acids (FFAs) as the acid catalysts can facilitate simultaneous esterification of FFAs and transesterification of triglycerides without soap formation [14,15].…”

Section: Introductionmentioning

confidence: 99%

Biodiesel production from used cooking oil using a novel surface functionalised TiO2 nano-catalyst

Gardy

Hassanpour

Lai

et al. 2017

Applied Catalysis B: Environmental

201

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Please cite this article as: J. Gardy, A. Hassanpour, X. Lai, M.H. Ahmed, M. Rehan, Biodiesel production from used cooking oil using a novel surface functionalised TiO 2 nano-catalyst, Applied Catalysis B, Environmental (2017), http://dx.doi. org/10.1016/j.apcatb.2017.01.080 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights• A novel, efficient and recyclable mesoporous TiO 2 /PrSO 3 H solid acid nano-catalyst was synthesised.• We examined the catalytic activity, stability and reusability of synthesised mesoporous TiO 2 /PrSO 3 H.• The FAME yield from UCO was 98.3% under optimum process conditions.• Synthesised biodiesel from UCO satisfied ASTM D6751 and EN 14214 standards. ABSTRACTA novel, efficient and recyclable mesoporous TiO 2 /PrSO 3 H solid acid nano-catalyst was synthesised by the post-synthetic grafting of propyl sulfonic acid groups onto a mixed phase of a TiO 2 support. The synthesised nano-catalyst was characterised using FTIR, SEM, TEM, XPS, N 2 adsorption-desorption isotherms, XRD, DSC, TGA, and CHNS analysis. The percentage of loading for propyl sulfonic acid on the TiO 2 support was calculated using CHNS analysis and TGA. The catalytic performance of TiO 2 /PrSO 3 H on the production of the fatty acid methyl esters (FAME) via simultaneous esterification and transesterification reactions from used cooking oil (UCO) has been studied. The effects of different process parameters showed that 98.3% of FAME can be obtained after 9 hrs of reaction time with 1:15 molar ratio of oil to methanol, 60°C reaction temperature and 4.5 wt% catalyst loading. It was also found that the one-pot post-surface functionalisation strategy with hydrophilic functional groups (-SO 3 H) enhanced the acid strengths of the nano-catalyst providing more acid sites for the reactants, and improving the accessibility of methanol to the

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Kinetic study of oleic acid esterification over 12-tungstophosphoric acid catalyst anchored to different mesoporous silica supports

Cited by 98 publications

References 28 publications

Esterification of High Free Fatty Acid Rice Bran Oil: Parametric and Kinetic Study

Esterification of High Free Fatty Acid Rice Bran Oil: Parametric and Kinetic Study

Montmorillonite-supported KF/CaO: a new solid base catalyst for biodiesel production

Biodiesel production from used cooking oil using a novel surface functionalised TiO2 nano-catalyst

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