Biodiesel production from soybean oil transesterification in subcritical methanol with K3PO4 as a catalyst

Yin, Jinling; Ma, Zhen; Shang, Zi-Yang; Hu, Dapeng; Xiu, Zhilong

doi:10.1016/j.fuel.2011.11.056

Cited by 43 publications

(19 citation statements)

References 21 publications

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“…Apart from that, the rising market price of petroleum because petroleum is unsustainable due to their dwindling reserves and depletion [1][2]. Therefore, the exhaustion of petroleum has become the main reasons behind of the quest for clean, environmental friendly and renewable alternative fuels [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…methanol or ethanol [5]. In the past few decades, biodiesel has received increased attention as it offers many environmental benefits such as renewable, non-toxic, biodegradable, contains zero sulfur and aromatic substances [1][2][3][4][5]. Furthermore, it can be mixed with petroleum-diesel in any proportion and directly used in engines with no need additional modifications [1].…”

Section: Introductionmentioning

confidence: 99%

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Biodiesel production from Jatropha curcas L. oil with Ca and La mixed oxide catalyst in near supercritical methanol conditions

Teo

Goto

Taufiq‐Yap

2015

The Journal of Supercritical Fluids

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Please cite this article as: Siow Hwa Teo, Motonobu Goto, Yun Hin Taufiq-Yap, Biodiesel production from Jatropha curcas L.oil with Ca and La mixed oxide catalyst in near supercritical methanol conditions, The Journal of Supercritical Fluids http://dx. AbstractThe catalytic transesterification of crude Jatropha curcus oil (JCO) with supercritical methanol (scMeOH), in the presence of calcium lanthanum mixed oxide (CaLaO) heterogeneous base catalyst was carried out using a batch reactor at near critical temperatures and pressures. The performance of synthesized CaLaO mixed oxide catalysts was examined by characterizing it through instruments such as XRD, BET and CO 2 -TPD, revealed that the Ca/La atomic ratio strongly affects the phase structure, catalyst basic sites, and thus the catalytic reactivity. The reaction parameters including Ca/La atomic molar ratio in the mixed metal oxide catalyst, molar ratio of methanol to oil, catalyst concentration, reaction pressure, temperature and time were varied one at a time and optimized based on the content of fatty acid methyl esters (FAMEs). The highest FAME yield for supercritical methanolysis reached 93 % under the optimum reaction conditions: 240 ○ C, 8.2 MPa, a molar ratio of methanol to oil of 21:1, and reaction time of 60 min in the presence of 1 wt. % catalyst. The results demonstrated that the presence of CaLaO mixed oxide catalyst in the reaction system effectively reduced reaction temperature, time and pressure of supercritical conditions. It required a very low concentration to mitigate the harsh operation conditions (290 ○ C, 15 MPa, 60 min) of the scMeOH process. On the other hand, supercritical reaction compensated for low conversion rate of solid catalytic transesterification whereby, it takes one step further byimproving the role of catalyst with supercritical conditions to achieve higher yield and shorter processing time. The reusability of CaLaO mixed oxide catalyst for repeated use was tested, the catalytic activity was >80 % when the catalyst was employed for fourth time. The study concluded that slight leaching of Ca 2+ (0.52~6.07 ppm) and La 3+ (0.34~2.33 ppm) occurred during transesterification reaction, however it is below acceptable levels of metals as ASTM D6751 (United State) and in Europe, EN 14214 (Europe) standards. This proved that heterogeneous catalytic supercritical reaction process is more promising than non-catalytic processes and it can be turned to practical use in the near future.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biodiesel production from Jatropha curcas L. oil with Ca and La mixed oxide catalyst in near supercritical methanol conditions

Teo

Goto

Taufiq‐Yap

2015

The Journal of Supercritical Fluids

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“…17 Biodiesel produced from ultrasound has shown superior properties than conventional. 18 Ultrasonic method was found more energy efficient than conventional stirring method. 19 2 1 a b s t r a c t 35 This work illustrates ultrasound assisted synthesis of biodiesel from waste cooking oil using calcium 36 diglyceroxide as a heterogeneous base catalyst.…”

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confidence: 99%

“…121 The main aim of the present work was to investigate the influ- The acid value and saponification value of WCO were deter-191 mined by titrimetric method [17]. Furthermore, molecular weight 192 was determined by using acid value and saponification value [18]. In general, the transesterification reaction of triglycerides (TG) 211 with methanol stoichiometrically can be written as: one mole of FAME is formed [19].…”

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confidence: 99%

Enhancement in biodiesel production using waste cooking oil and calcium diglyceroxide as a heterogeneous catalyst in presence of ultrasound

Gupta

Yadav

Rathod

2015

Fuel

139

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“…This yield is obviously more efficient than that of the traditional alkali-catalyzed path which produced 6% FAME with 1% catalyst at a temperature of 260°C. In order to decrease the disadvantage of homogenous catalyst, the same authors [50] studied the synthesis of biodiesel from soybean oil in the presence of a heterogeneous catalyst tri-potassium phosphate (K 3 PO 4 ) in SCF methanol. The outcome obtained displayed high catalytic activity of K 3 PO 4 towards the transesterification of soybean oil.…”

Section: Scf Methanolmentioning

confidence: 99%

Supercritical fluid technology in biodiesel production

Hoang

Bensaid

Saracco

2013

Green Processing and Synthesis

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Abstract:The synthesis of biodiesel has received attention as an alternative source of energy to decrease our dependence on petroleum-based fuels. The catalyzed processes present a series of limitations and drawbacks, among them the high energy required for complex purification and undesirable side reactions. Supercritical fluid (SCF) technology is being proved an efficient approach compared to traditional methods for preparing biodiesel. This review illustrates the advances, advantages, and drawbacks involved in the use of all current biodiesel production technologies.Keywords: biodiesel; catalyst; non-catalytic; supercritical fluid; transesterification. List of abbreviationsBDF, biodiesel fuel; FA, fatty acid; FFA, free fatty acid; FAAE, fatty acid alkyl ester; FAME, fatty acid methyl ester; FAEE, fatty acid ethyl

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Biodiesel production from soybean oil transesterification in subcritical methanol with K3PO4 as a catalyst

Cited by 43 publications

References 21 publications

Biodiesel production from Jatropha curcas L. oil with Ca and La mixed oxide catalyst in near supercritical methanol conditions

Biodiesel production from Jatropha curcas L. oil with Ca and La mixed oxide catalyst in near supercritical methanol conditions

Enhancement in biodiesel production using waste cooking oil and calcium diglyceroxide as a heterogeneous catalyst in presence of ultrasound

Supercritical fluid technology in biodiesel production

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