Homogeneously Catalyzed Transesterification of Nigerian &amp;lt;i&amp;gt;Jatropha curcas&amp;lt;/i&amp;gt; Oil into Biodiesel: A Kinetic Study

Aransiola, Elizabeth Funmilayo; Daramola, Michael O.; Ojumu, Tunde Victor; Solomon, B. O.; Layokun, S. K.

doi:10.4236/mrc.2013.23012

Cited by 21 publications

(11 citation statements)

References 15 publications

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“…The estimated reaction rate constant, k 1 = 0.0059 ± 0.0002 L mol −1 min −1 , was in the similar range as reported by Aransiola et al [38]. Figure 9 suggested that this model was a reasonable fit (correlation of coefficient = 0.865) to the data of the initial reaction period (0-20 min).…”

supporting

confidence: 83%

Kinetics and Mechanism of NaOH-Impregnated Calcined Oyster Shell-Catalyzed Transesterification of Soybean Oil

et al. 2017

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Abstract:The objective of this research is to develop a kinetic model to describe the transesterification of soybean oil with methanol using NaOH-impregnated calcined oyster shell (Na-COS). Batch experiments were performed via a two-factor randomized complete block design using a molar ratio of methanol to oil (MR) of 6, 12, and 18 and catalyst loadings (CL) (mass of catalyst/mass of oil in %) of 2%, 4%, 6%, and 8% to obtain fatty acid methyl ester yields. In addition, the catalyst was studied by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and time-of-flight secondary ion spectrometry (TOF-SIMS) to elucidate the role of the catalyst in the transesterification reaction. XRD and XPS analyses suggested that the formation of sodium peroxide (Na 2 O 2 ) on the surface contributed to catalytic activity. The TOF-SIMS analysis suggested that the transesterification occurred between adsorbed triglyceride and free methanol, similar to the Eley-Rideal mechanism. The transesterification of adsorbed triglyceride to adsorbed diglyceride was found to be the rate-determining step with a rate constant of 0.0059 ± 0.0002 L mol −1 min −1 .

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confidence: 83%

Kinetics and Mechanism of NaOH-Impregnated Calcined Oyster Shell-Catalyzed Transesterification of Soybean Oil

et al. 2017

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“…Many researchers studied transesterification reactions kinetics intensively [44][45][46]. The main concern of these studies is to obtain a reasonable reaction rate expression in order to have a proper design for a reactor its aim is the production of biodiesel.…”

Section: Kinetic Modelingmentioning

confidence: 99%

Transesterification of Low FFA Waste Vegetable Oil using Homogeneous Base Catalyst for Biodiesel Production: Optimization, Kinetics and Product Stability

Al-Sakkari¹,

Sheltawy²,

Soliman³

et al. 2018

JACS

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The most common method of biodiesel production is base catalyzed transesterification where alkaline materials, such as potassium hydroxide, are used as a catalyst. This paper presents a study of factors affecting biodiesel production from low free fatty acids (FFA) content waste vegetable oil through base catalyzed transesterification as well as the optimum reaction conditions. The optimum conditions were found to be a time of 60 min, catalyst loading of 1% of oil mass, mixing speed of 400 rpm and temperature of 65 °C. It also introduces a kinetic study of this reaction to determine the best model to fit the experimental data. First order model was found to be the best one to fit the early reaction stages while the second order model was the best to describe reaction kinetics in later stages. The stability of produced biodiesel was studied through determination of acid value and viscosity of stored biodiesel along three months.

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“…Experimental results provided in Table 3 were employed in developing a regression model using the general polynomial regression model presented in Eq. (2) (5) where T, t and W are the reaction temperature ( • C), the reaction time (min) and the catalyst weight (in wt.%), respectively. The experimental yield of biodiesel (Y e ) was also compared with the predicted biodiesel yield (Y p ) as shown in Table 3.…”

Section: Empirical Modelling and Influence Of Operating Variablesmentioning

confidence: 99%

“…These raw materials are not entirely suitable, more especially in developing countries, due to the limited supply and high cost associated with their application, as well as competition with the food chain [2]. Therefore, low cost, non-edible oils such as jatropha oil, animal fat and waste cooking oil have been suggested and tested as alternatives [3][4][5]. However, the main disadvantage of these non-edible types of feedstock is the high content of free fatty acid (FFA) within the oils, which poses problems in the production process.…”

Section: Introductionmentioning

confidence: 99%

Influence of operating variables on the transesterification of waste cooking oil to biodiesel over sodium silicate catalyst: A statistical approach

Daramola

Mtshali

Senokoane

et al. 2016

Journal of Taibah University for Science

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This study examined the use of surface response methodology to investigate the influence of operating variables on the transesterification of waste cooking oil (WCO) to biodiesel over sodium silicate catalysts. The individual and interactive effects of three variables namely, reaction time, reaction temperature and amount of catalyst was evaluated using full 2 3 (+1) factorial design. The conversion of WCO to biodiesel was achieved through the transesterification reaction over the catalyst at a methanol-to-oil molar ratio of 6:1 in a batch reactor. Physicochemical properties of the sodium silicate catalyst were obtained using Fourier transform infrared spectroscopy (FT-IR) for surface chemistry, thermo-gravimetric analysis (TGA) for thermal stability, N 2 physisorption test for Brunauer-Emmett-Teller analysis and scanning electron microscopy (SEM) for morphology. The reaction temperature, reaction time and weight of the catalyst (expressed as a percentage of the amount of WCO) were varied to understand their effect on the yield of biodiesel via response surface methodology (RSM) approach. The BET analysis showed a surface area of 0.386 m 2 /g for the catalyst. Results from the transesterification reaction reveal that change in catalyst weight percentage had no considerable effect on the biodiesel yield and that there was no mutual interaction between the reaction time and catalyst weight percentage. The results also conveyed that the reaction temperature and reaction time were limiting conditions and a slight variation herein altered the biodiesel yield. The transesterification of WCO produced 57.92% maximum FAME yield at the optimum methanol to oil molar ratio of 6:1, catalyst weight of 2.5%, reaction time of 240 min and a reaction temperature of 64 • C. The variance ratio, VR < F value obtained from the cross-validation experiments indicate perfect agreement of the model output with experimental results and also testifies to the validity and suitability of the model to predict the biodiesel yields.

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Homogeneously Catalyzed Transesterification of Nigerian <i>Jatropha curcas</i> Oil into Biodiesel: A Kinetic Study

Cited by 21 publications

References 15 publications

Kinetics and Mechanism of NaOH-Impregnated Calcined Oyster Shell-Catalyzed Transesterification of Soybean Oil

Kinetics and Mechanism of NaOH-Impregnated Calcined Oyster Shell-Catalyzed Transesterification of Soybean Oil

Transesterification of Low FFA Waste Vegetable Oil using Homogeneous Base Catalyst for Biodiesel Production: Optimization, Kinetics and Product Stability

Influence of operating variables on the transesterification of waste cooking oil to biodiesel over sodium silicate catalyst: A statistical approach

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