Phase equilibria of methanol–triolein system at elevated temperature and pressure

Tang, Zhong; Du, Zuojuan; Min, Enze; Gao, Liang; Jiang, Tao; Han, Buxing

doi:10.1016/j.fluid.2005.10.010

Cited by 56 publications

(44 citation statements)

References 11 publications

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“…In the reaction of MPO with ethanol, the temperature proved to be favorable in both reactions in the range of 523 to 573 K, as seen in Table 4. A temperature increase at higher pressures led to better miscibility between the triacylglycerols and alcohol (Tang et al, 2006), obtaining the supercritical phase for the triolein-ethanol system above 543 K at 200 bar and triolein:ethanol molar ratio of 1:42 (Almagrbi et al, 2012).…”

Section: Effect Of Temperaturementioning

confidence: 99%

Assessment of process variables on the use of macauba pulp oil as feedstock for the continuous production of ethyl esters under pressurized conditions

Colonelli

Trentini

Santos

et al. 2017

Braz. J. Chem. Eng.

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-This study evaluated the potential of macauba pulp oil (MPO) as a feedstock for continuous ester production using ethanol under pressurized conditions. Experiments were performed in order to obtain data for the effect of process variables on ethyl ester (FAEE) and free fatty acid (FFA) conversion in a catalyst-free process. From the results, it appears that the MPO to ethanol mass ratio and the pressure were the variables with more favorable effect on the evaluated response variables. The addition of n-hexane caused an increase in the production of esters; however, this had a negative effect on FFA conversion. The addition of water was unfavorable for oil processing with high acidity. In this process, esterification and transesterification occur simultaneously, and the high FFA content in MPO provides high yields (85 wt% of esters; 93% FFA conversion) at low temperature, since the esterification reaction rate is higher than the transesterification. The decomposition of fatty acids was evaluated and levels <5% were observed under the evaluated experimental conditions.

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Section: Effect Of Temperaturementioning

confidence: 99%

Assessment of process variables on the use of macauba pulp oil as feedstock for the continuous production of ethyl esters under pressurized conditions

Colonelli

Trentini

Santos

et al. 2017

Braz. J. Chem. Eng.

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“…Then, the methoxide ions attacked the TG molecules to form esters in a process similar to the reaction (1) (Guan and Kusakabe, 2009). No cosolvents were used to enhance the miscibility of the alcohol and canola oil system in the electro-catalytic process presented in this work (Tang et al, 2006). Therefore, the reaction was performed in a two-phase reaction mixture.…”

Section: Conversion Of Canola Oil In Methanolic and Ethanolic Reactiomentioning

confidence: 99%

“…of temperature from 20 to 40°C promoted the miscibility of the system and, therefore, greater canola oil conversion rates (Tang et al, 2006;Oliveira et al, 2011).…”

Section: Conversion Of Canola Oil In Methanolic and Ethanolic Reactiomentioning

confidence: 99%

“…Biodiesels produced using methanol consist of methyl esters (MEs) with variable carbon chain length and unsaturated bonds related to the oil and fat feedstock used (Yoon et al, 2014). Conventional transesterification of the triglycerides (TGs) with an alcohol (A) is a typical two-phase reaction due to the poor solubility of the alcohol into the TG phase (Tang et al, 2006). In order to increase the yield and rate of the reaction, a homogeneous acid or alkaline catalyst is usually introduced with excess alcohol molecules to shift the reaction equilibrium toward the product side (Ma and Hanna, 1999;Clements and Gerpen, 2004).…”

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confidence: 99%

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Electro-Catalytic Biodiesel Production from Canola Oil in Methanolic and Ethanolic Solutions with Low-Cost Stainless Steel and Hybrid Ion-Exchange Resin Grafted Electrodes

et al. 2017

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Biodiesel is a growing alternative to petroleum fuels and is produced by the catalyzed transesterification of fats in presence of an alcohol base. Transesterification processes using homogeneous catalysts are considered to be among the most efficient methods but rely on the feedstock quality and low water content in order to avoid undesirable saponification reactions. In this work, the electro-catalytic conversion of canola oil to biodiesel in a 1% aqueous methanolic and ethanolic reaction mixture was performed without the addition of external catalyst or cosolvent. An inexpensive stainless steel (SS) electrode and a hybrid SS electrode coated with an ion-exchange resin catalyst were used as cathode materials while the anode was composed of a plain carbon paper. The cell voltages were varied from 10 to 40 V and the reaction temperature maintained at 20 or 40°C. The canola oil conversion rates were found to be superior at 40°C without saponification reactions for cell voltages below 30 V. The conversion rates were as high as 87% for the hybrid electrode and 81% for the plain SS electrode. This work could inspire new process development for the conversion of high water content feedstock for the production of second-generation biodiesel.

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“…In 2009, carbon dioxide was applied to supercritical transesterification with ethanol to reduce the operating conditions (Bertoldi et al, 2009). From 2007 to 2010, numerous additional studies, such as vapor-liquid equilibria of binary systems (Anitescu et al, 2008;Fang et al, 2008;Shimoyama et al, 2008;Shimoyama et al, 2009;Tang et al, 2006), phase behavior of the reaction mixture (Glišic & Skala, 2010;Hegel et al, 2008;Hegel et al, 2007), thermal stability of unsaturated fatty acids in supercritical methanol (Imahara et al, 2008) and process simulation and economic analysis (Busto et al, 2006;D'Ippolito et al, 2006;Deshpande et al, 2010;Diaz et al, 2009;van Kasteren & Nisworo, 2007) were reported, leading to a better understanding of the supercritical transesterification process.…”

Section: The Chronological Development Of Supercritical Transesterifimentioning

confidence: 99%

Transesterification in Supercritical Conditions

Ngamprasertsith¹,

Sawangkeaw²

2011

Biodiesel - Feedstocks and Processing Technologies

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Phase equilibria of methanol–triolein system at elevated temperature and pressure

Cited by 56 publications

References 11 publications

Assessment of process variables on the use of macauba pulp oil as feedstock for the continuous production of ethyl esters under pressurized conditions

Assessment of process variables on the use of macauba pulp oil as feedstock for the continuous production of ethyl esters under pressurized conditions

Electro-Catalytic Biodiesel Production from Canola Oil in Methanolic and Ethanolic Solutions with Low-Cost Stainless Steel and Hybrid Ion-Exchange Resin Grafted Electrodes

Transesterification in Supercritical Conditions

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