Simultaneous development of biodiesel synthesis and fuel quality via continuous supercritical process with reactive co-solvent

Akkarawatkhoosith, Nattee; Kaewchada, Amaraporn; Jaree, Attasak

doi:10.1016/j.fuel.2018.09.077

Cited by 20 publications

(13 citation statements)

References 40 publications

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“…Moreover, it was found that supercritically produced biodiesel under short‐chain alcohol showed low characteristics against the cold flow properties. However, on the other hand, the use of higher alcohol such as isopropanol may enhance the cold flow properties of the biodiesel produced 75 . As the esterification reaction is a reversible and dynamic equilibrium between esters and hydrolyzed esters, equilibrium reaches before complete conversion.…”

Section: The Parameters Affecting Transesterification Reaction In the Scf Methodsmentioning

confidence: 99%

Supercritical transesterification route for biodiesel production: Effect of parameters on yield and future perspectives

Singh

Kumar

Gautam

2021

Env Prog and Sustain Energy

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Catalyst‐free biodiesel production through supercritical transesterification is faster with the high conversion and a more environment‐friendly route than conventional catalyst transesterification. Improving and exploring the new possibilities in this alternative biodiesel production method by including newly available technology will lead us to a more sustainable future. In this paper, supercritical transesterification of biodiesel production has been reviewed in detail. The different parameters of this method, such as temperature, pressure, molar ratio, alcohol types, and residence time which affect the yielding and quality of fuel, have been reviewed. Besides, recycling the energy and suitable feedstock for this method has also been explored to reduce the intensive energy demand and operating cost. Furthermore, light has also thrown on co‐solvents effect on this method to reduce the extreme reaction conditions required. At last, the review concludes future recommendations in supercritical transesterification along with the challenges in energy integration and recycling.

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Section: The Parameters Affecting Transesterification Reaction In the Scf Methodsmentioning

confidence: 99%

Supercritical transesterification route for biodiesel production: Effect of parameters on yield and future perspectives

Singh

Kumar

Gautam

2021

Env Prog and Sustain Energy

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“…In research conducted by Tobar and Núñez (2018), the highest yield of ethyl esters (68%) was obtained with the addition of CO 2 (0.001 g CO 2 per g of ethanol) as a co-solvent at 300 °C and 20 MPa. Akkarawatkhoosith et al, (2019c) reported that an iso-propanol:oil weight ratio of 0.1:1 for only 3 min at 350 °C gave a 37% increase in the ester yield. The same research group (Akkarawatkhoosith et al, 2019b) also found that in the reaction conducted at 300 °C for 4 min the addition of a co-solvent (55 wt% ethyl acetate) promoted an increase in the ethyl ester production of ∼68% compared to the reaction with no co-solvent added.…”

Section: Effect Of Co-solventmentioning

confidence: 99%

“…Another aspect to be considered is the addition of a co-solvent to the reaction medium, which can act to improve the operating conditions of the technology using alcohol under sub-and supercritical conditions. This generally involves the reduction of some adjustable parameters of the reaction, such as temperature, pressure, residence time and/or oil-to-alcohol ratio (Akkarawatkhoosith et al, 2019c(Akkarawatkhoosith et al, , 2019aOsmieri et al, 2017;Tobar and Núñez, 2018). In addition, the miscibility and solubility of the reaction mixture are also improved (Akkarawatkhoosith et al, 2019a(Akkarawatkhoosith et al, , 2019bĐokić-Stojanović1 et al, 2019;Muppaneni et al, 2013), ensuring a high production of esters in a short period of time and without the use of a catalyst (Lim and Lee, 2013).…”

Section: Introductionmentioning

confidence: 99%

Catalyst-free production of fatty acid ethyl esters (FAEE) from macauba pulp oil

et al. 2021

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In this study, the production of fatty acid ethyl esters (FAEE) from macauba pulp oil and pressurized ethanol was investigated. The experiments were conducted without the addition of catalyst, at 20 MPa, to determine the effect of temperature (200 to 300 °C) and the oil to ethanol mass ratio (1:1 and 1:2) on the FAEE content and different residence times (10 to 45 min). The effect of the addition of n-hexane to the oil (20 wt%) as a co-solvent was also evaluated. The use of high temperatures (275 and 300 °C) resulted in high FAEE content (∼90%). Increasing the amount of ethanol in the reaction medium contributed to the formation of esters only at operating temperatures of 200 to 250 °C. It was also observed that with the addition of co-solvent (in the oil) it was possible to obtain high amounts of FAEE in a shorter reaction time. In addition, a low content of unreacted compounds (∼8.0%) and the conversion of ∼90 and 99% of the free fatty acids and triglycerides were observed, respectively.

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“…In addition, the process has several advantages over catalytic conventional processes including high yield of biodiesel, elimination of wastewater, reduction of process unit operations, simple product separation and high-quality of biodiesel [ 18 ]. Several researchers have studied the supercritical valorisation of high acidity feedstock into biodiesel [ 19 , 20 ]. In our previous study [ 21 ], we have successfully valorised high acid value WCO into biodiesel with 98.8% yield and optimised the process parameters using response surface methodology (RSM).…”

Section: Introductionmentioning

confidence: 99%

Advanced process integration for supercritical production of biodiesel: Residual waste heat recovery via organic Rankine cycle (ORC)

et al. 2021

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Biodiesel production using supercritical methanolysis has received immense interest over the last few years. It has the ability to convert high acid value feedstock into biodiesel using a single-pot reaction. However, the energy intensive process is the main disadvantage of supercritical biodiesel process. Herein, a conceptual design for the integration of supercritical biodiesel process with organic Rankine cycle (ORC) is presented to recover residual hot streams and to generate electric power. This article provides energy and techno-economic comparative study for three developed scenarios as follows: original process with no energy integration (Scenario 1), energy integrated process (Scenario 2) and advanced energy integrated process with ORC (Scenario 3). The developed integrated biodiesel process with ORC resulted in electric power generation that has not only satisfied the process electric requirement but also provided excess power of 257 kW for 8000 tonnes/annum biodiesel plant. The techno-economic comparative analysis resulted in favouring the third scenario with 36% increase in the process profitability than the second scenario. Sensitivity analysis has shown that biodiesel price variation has significant effect on the process profitability. In summary, integrating supercritical biodiesel production process with ORC appears to be a promising approach for enhancing the process techno-economic profitability and viability.

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Simultaneous development of biodiesel synthesis and fuel quality via continuous supercritical process with reactive co-solvent

Cited by 20 publications

References 40 publications

Supercritical transesterification route for biodiesel production: Effect of parameters on yield and future perspectives

Supercritical transesterification route for biodiesel production: Effect of parameters on yield and future perspectives

Catalyst-free production of fatty acid ethyl esters (FAEE) from macauba pulp oil

Advanced process integration for supercritical production of biodiesel: Residual waste heat recovery via organic Rankine cycle (ORC)

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