Kinetic Modeling Studies of Heterogeneously Catalyzed Biodiesel Synthesis Reactions

Kapil, Ankur; Wilson, Karen; Lee, Adam F.; Sadhukhan, Jhuma

doi:10.1021/ie101403f

Cited by 62 publications

(27 citation statements)

References 28 publications

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“…The adsorption of methanol as limiting step has also been proposed by Dossin, Reyniers, and Marin 2006 and Kapil et al 2011. This is also in agreement with the reaction mechanism proposed by Kusuma et al 2013, wherein has been postulated that without the formation of the methoxide compound in the active sites of K 2 O in the zeolite, the transesterification reaction does not start.…”

Section: Kinetic Modellingsupporting

confidence: 83%

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Kinetics of Transesterification of Safflower Oil to Obtain Biodiesel Using Heterogeneous Catalysis

Muciño

Romero

Ramírez

et al. 2016

International Journal of Chemical Reactor Engineering

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The kinetics of the transesterification of safflower oil and methanol catalyzed by K 2 O/NaX was studied and modeled. The influence of the oil-methanol initial molar ratio and amount of catalyst were investigated to achieve a maximum triglycerides conversion (99 %) and a final methyl esters content of 94 % ± 1. A kinetic model based on an Eley-Rideal mechanism was found to best fit the experimental data when assuming methanol adsorption as determining step. Other models derived from Langmuir -Hinshelwood -Hougen -Watson (LHHW) mechanisms were rejected based on statistical analysis, mechanistic considerations and physicochemical interpretation of the estimated parameters.

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Section: Kinetic Modellingsupporting

confidence: 83%

“…if this criterion ratio is smaller than 1 than model A describes better the experimental results than model B (Kapil et al 2011).…”

Section: Modeling and Regression Analysismentioning

confidence: 97%

Kinetics of Transesterification of Safflower Oil to Obtain Biodiesel Using Heterogeneous Catalysis

Muciño

Romero

Ramírez

et al. 2016

International Journal of Chemical Reactor Engineering

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“…The models proposed by Liu et al [86] and Huang et al [87] consist of two and three different equations for different stages of the transesterification process. Some more complex models were developed based on the Eley-Rideal or Langmuir-Hinshelwood reaction mechanism [66,80,[88][89][90], while other complex models consist of three [91] and four [92] consecutive and reversible second-order reactions. Two kinetic models that have been recently proposed [93][94][95] predict well the reaction rate during the whole course of methanolysis process but for process realized at temperature below 100 °C.…”

Section: Kinetic Models Used For Heterogeneously Catalyzed Transestermentioning

confidence: 99%

Heterogeneous kinetics of vegetable oil transesterification at high temperature

Nasreen

Liu

Lukić³

et al. 2016

CI&CEQ

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Article Highlights • Kinetics of transesterification catalyzed by different catalysts from literature was analyzed • Transition and earth metals as catalyst for the high temperature transesterification • Three kinetic models were used for predicting the effect of high temperature transesterification • Apparent reaction rate constant and other parameters for more complicated models were determined Abstract Currently, the catalytic efficiency and reusability of the solid base catalysts cannot meet the demand of industrial biodiesel production under low temperature. The purpose of this study is to define the kinetics of heterogeneous transesterification process that could be used for the prediction of the biodiesel synthesis at high temperature and pressure. The focus in this study was paid to recently reported data obtained with different catalysts used for biodiesel synthesis in a batch reactor at high temperatures. It was shown that three kinetic models, including: a) irreversible first order reaction, b) reaction with changeable order and c) resistances of mass transfer and chemical reaction at active sites of the catalyst, could be applied for predicting the effect of high temperature of the transesterification. The apparent reaction rate constant of the irreversible first order reaction was determined, as well as the parameters of the other two, more complicated kinetic models. The best agreement was obtained with the more complicated models and the mean relative percent deviation between calculated and experimentally determined triacylglycerols conversion for these kinetic models is between 3 and 10%.

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“…Hence, some researchers focus on developing a model that expresses a shift in the rate‐controlling step by using two independent correlations 6, 11. More complex models are based on the Eley‐Rideal 16 or Langmuir‐Hinshelwood 17 reaction mechanism. Other complex models include the mass transfer limitation 9, 15.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Modeling of Sunflower Oil Methanolysis Catalyzed by Calcium‐Based Catalysts

et al. 2015

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The kinetic model originally developed for quicklime-catalyzed methanolysis of sunflower oil was tested for another three calcium-based catalysts, namely, neat CaO, Ca(OH) 2 , and CaOÁZnO. This model includes the changing reaction mechanism and the triacylglycerol (TAG) mass transfer. The applicability and generalization capability of this model for heterogeneous methanolysis reaction catalyzed by calcium-based catalysts was evaluated. As indicated by the high coefficient of determination and the relatively small mean relative percentage deviation, the model was a reliable predictor of the time variation of TAG conversion degree in the sunflower oil methanolysis over all four calcium-based catalysts within the ranges of the reaction conditions applied. This model is recommended in general for describing the kinetics of sunflower oil methanolysis over calcium-based catalysts.

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Kinetic Modeling Studies of Heterogeneously Catalyzed Biodiesel Synthesis Reactions

Cited by 62 publications

References 28 publications

Kinetics of Transesterification of Safflower Oil to Obtain Biodiesel Using Heterogeneous Catalysis

Kinetics of Transesterification of Safflower Oil to Obtain Biodiesel Using Heterogeneous Catalysis

Heterogeneous kinetics of vegetable oil transesterification at high temperature

Kinetic Modeling of Sunflower Oil Methanolysis Catalyzed by Calcium‐Based Catalysts

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