Influence of Mass Transfer on the Production of Biodiesel

Lifka, Jan; Ondruschka, Bernd

doi:10.1002/ceat.200407033

Cited by 50 publications

(15 citation statements)

References 12 publications

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“…Lifka and Ondruschka [37] reported that agitation is an important factor for biodiesel production. Therefore, in this study, the agitation speed was investigated to improve the FAME yield from dried biomass.…”

Section: Effect Of the Agitation Speed On The Fame Yield From Dried Bmentioning

confidence: 99%

Optimization of biodiesel from dried biomass of Schizochytrium limacinum using methanesulfonic acid-DMC

2016

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Keywords:Fatty acid methyl esters Biomass dried with 60e120 silica Dried biomass Transesterification GCeMS Dimethyl carbonate a b s t r a c t Novel biodiesel or fatty acid methyl ester (FAME) was produced from dried biomass of Schizochytrium limacinum with dimethyl carbonate over a time period of 30 min. The highest FAME yield could reach 84% at 85 C with a ratio of dried biomass to dimethyl carbonate of 1:4 w/w, with extra solvent of petroleum ether, 1.5 wt. % methanesulfonic acid (based on oil weight) and an agitation speed of 150 rpm. Biomass dried with 60e120 silica gels at 38 C for 30 min was investigated. FAME was purified using Amberlyst™ 15 dry resin. FAME was analyzed via gas chromatography-mass spectrometry with the internal standard method. The properties of FAME met the international standard ASTM D 6751-02. The results revealed that all of the reaction variables in study had positive effects. Present study indicate that FAME could be a potential alternative to diesel.

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Section: Effect Of the Agitation Speed On The Fame Yield From Dried Bmentioning

confidence: 99%

Optimization of biodiesel from dried biomass of Schizochytrium limacinum using methanesulfonic acid-DMC

2016

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“…Figure 4 shows the pseudo second-order reaction with respect to TAG for commercial, corn and grape seed oils during the whole reaction period and only in the initial period of the reaction for canola and palm oils. It appears that base-catalyzed methanolysis of vegetable oils with high percentage of linoleic acid follows the second-order reaction kinetics such as for the commercial, corn, grape seed (52.5, 66.5 and 82.2%, respectively) [6] sunflower (68.7%) [11], cottonseed (57.4%) [10] and soybean (typically 55.5%) [22,32] oils. It appears that base-catalyzed methanolysis of vegetable oils with high percentage of linoleic acid follows the second-order reaction kinetics such as for the commercial, corn, grape seed (52.5, 66.5 and 82.2%, respectively) [6] sunflower (68.7%) [11], cottonseed (57.4%) [10] and soybean (typically 55.5%) [22,32] oils.…”

Section: Reaction Kinetic Modelmentioning

confidence: 99%

“…Methanol and TAG are immiscible [2] and the reaction between the reactants occurs on the interfacial surface [3]. Based on the known effects of ultrasonic cavitation such as mixing, heating and disruption of the interface, some researchers have sped up the reaction rate by carrying out methanolysis in the presence of ultrasound [5][6][7][8][9][10][11][12]. Based on the known effects of ultrasonic cavitation such as mixing, heating and disruption of the interface, some researchers have sped up the reaction rate by carrying out methanolysis in the presence of ultrasound [5][6][7][8][9][10][11][12].…”

mentioning

confidence: 99%

Empirical modeling the ultrasound-assisted base-catalyzed sunflower oil methanolysis kinetics

Avramović¹,

Stamenković²,

Todorović³

et al. 2012

CI&CEQ

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The ultrasound-assisted sunflower oil methanolysis catalyzed by KOH was studied to define a simple empirical kinetic model useful for reactor design without complex computation. It was assumed that the neutralization of free fatty acids and the saponification reaction were negligible. The methanolysis process rate was observed to be controlled by the mass transfer limitation in the initial heterogeneous regime and by the chemical reaction in the later pseudo-homogeneous regime. The model involving the irreversible second-order kinetics was established and used for simulation of the triacylglycerol conversion and the fatty acid methyl esters formation in the latter regime. A good agreement between the proposed model and the experimental data in the chemically controlled regime was found

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“…As mentioned previously, high concentrations of alkaline catalyst form soaps in the presence of large residues of fatty acids resulting in emulsion formation between soaps and water molecules, thus leading to low yields of methyl esters. Lifka and Ondruscka [31] studied the effect of ultrasonication versus mechanical stirring on the alkaline transesterification of rapeseed using NaOH at a concentration of 0.5% w/w at 45 °C and reported a conversion of 80-85% obtained for both the ultrasonicated and mechanically stirred reactions after 30 mins. Georgogianni et al [32] also reported a yield of 81% with regards to using a catalyst concentration of 1.5% w/w NaOH on sunflower seed oil which slightly corresponds to the value reported above in Table 2.…”

Section: Effect Of Catalyst Concentrationmentioning

confidence: 99%

Low-Cost Feedstock Conversion to Biodiesel via Ultrasound Technology

et al. 2010

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Biodiesel has attracted increasing interest and has proved to be a good substitute for fossil-based fuels due to its environmental advantages and availability from renewable resources such as refined and waste vegetable oils. Several studies have shown that biodiesel is a better fuel than the fossil-derived diesel in terms of engine performance, emissions reduction, lubricity and environmental benefits. The increasing popularity of biodiesel has generated great demand for its commercial production methods, which in turn calls for the development of technically and economically sound process technologies. This paper explores the applicability of ultrasound in the optimization of low-cost feedstock -in this case waste cooking oil -in the transesterification conversion to biodiesel. It was found that the conversion efficiency of the waste oil using ultrasound was higher than with the mechanical stirring method. The optimized variables of 6:1 methanol/oil ratio at a reaction temperature of 30 °C and a reaction time of 30 min and 0.75% KOH (wt/wt) catalyst concentration was obtained for the transesterification of the waste oil via the use of ultrasound.

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Influence of Mass Transfer on the Production of Biodiesel

Cited by 50 publications

References 12 publications

Optimization of biodiesel from dried biomass of Schizochytrium limacinum using methanesulfonic acid-DMC

Optimization of biodiesel from dried biomass of Schizochytrium limacinum using methanesulfonic acid-DMC

Empirical modeling the ultrasound-assisted base-catalyzed sunflower oil methanolysis kinetics

Low-Cost Feedstock Conversion to Biodiesel via Ultrasound Technology

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