Esters production in continuous reactor from macauba pulp oil using methyl acetate in pressurized conditions

Visioli, Luiz Jardel; Trentini, Caroline Portilho; Castilhos, Fernanda de; Silva, Camila da

doi:10.1016/j.supflu.2018.06.018

Cited by 24 publications

(14 citation statements)

References 42 publications

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“…In cases where methyl acetate is used under pressurized conditions and in a catalyst‐free process, the temperature is the main variable manipulated to obtain higher ester yields. [ 23,61 ] This is because an increase in temperature improves the reactivity between methyl acetate and triglycerides, which increases the reaction rate and induces the production of ME and TA. [ 62 ] In addition, when working at temperatures above the critical point, the number of collisions between molecules within a certain time is increased, [ 63 ] resulting in greater mutual solubility between the components of the reaction mixture [ 64 ] and an increase of up to 93% in the reaction rate constant.…”

Section: Resultsmentioning

confidence: 99%

“…In a study by Visioli et al. [ 23 ] increasing the temperature from 275 °C to 325 °C resulted in an increase of 22.50% in ester yield for the reaction with macauba pulp oil. However, it is important to mention that the critical properties of vegetable oils can change due to differences in the fatty acid compositions.…”

Section: Resultsmentioning

confidence: 99%

“…[ 4 ] This effect was evidenced in this study when conducting the reaction in temperature above of 350 °C, which led to a reduction in the production of esters. For supercritical interesterification, a decrease in ester formation with the application of elevated temperatures has been observed at 345 °C, [ 31 ] 350 °C, [ 23,24,66 ] and 400 °C. [ 34 ]…”

Section: Resultsmentioning

confidence: 99%

“…The pressure was kept fixed (20 MPa) based on previous study, [ 23 ] and the sampling was performed after mixing in a cooling system at 10 °C. The residence time were calculated by dividing the empty volume of the reactor (60.7 mL) by the flow rate fixed in the pump (mL min −1 ).…”

Section: Methodsmentioning

confidence: 99%

“…In this regard, methyl acetate can be used in the oil extraction step [ 3,21 ] and in the supercritical reaction. [ 22–25 ] The conduction of the reaction with methyl acetate has the advantage of producing triacetin, which can be incorporated as a biodiesel additive in the proportion of up to 10 wt%, [ 26 ] which provides improved cold flow properties and oxidation stability of the biofuel. [ 27 ]…”

Section: Introductionmentioning

confidence: 99%

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Use of the Product from Low Pressure Extraction (Crambe Seed Oil and Methyl Acetate) for Synthesis of Methyl Esters and Triacetin Under Supercritical Conditions

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Mello

Cardozo‐Filho

et al. 2020

Euro J Lipid Sci & Tech

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Methyl esters (ME) and triacetin production from the supercritical interesterification of the product from low pressure extraction (crambe seed oil and methyl acetate) are evaluated. Reactions are conducted at 300-375°C for different residence times, at 20 MPa, and under these conditions the thermal stability of triacetin is evaluated. The effect of the free fatty acid (FFA) concentration (in oil) is determined. An increase in temperature favors the formation of ME and triacetin at shorter reaction times. At 375°C, after 15 min a drop in the ME yield is observed and triacetin is not detected. A reduction in the triacetin concentration (reaching ≈99%) is observed at 375°C. High FFA concentration (in oil) initially provided higher product generation, however, after 15 min no influence is observed. The highest ME yield (≈60%) is obtained at 300°C, along with 1.22 wt% triacetin and ≈5.0 wt% unreacted compounds. Practical Applications: This paper reports new experimental data on an integrated process for the production of methyl esters from low pressure extraction (crambe seeds and methyl acetate) and supercritical reaction of the extraction mixture. The technique used allows the removal of a high quantity of oil from good quality crambe seeds. The viability of applying the integrated process to obtain oils with a high content of free fatty acids is verified, promoting the obtainment of relatively simple methyl esters. The procedure does not require oil purification and solvent recovery prior to the reaction.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Use of the Product from Low Pressure Extraction (Crambe Seed Oil and Methyl Acetate) for Synthesis of Methyl Esters and Triacetin Under Supercritical Conditions

Postaue

Mello

Cardozo‐Filho

et al. 2020

Euro J Lipid Sci & Tech

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A concise review on alternative route of biodiesel production via interesterification of different feedstocks

Esan

Olabemiwo

Smith³

et al. 2021

Int J Energy Res

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Environmental challenges and decreasing fossil reserves due to increased utilization of fossil fuels have propagated the importance of alternative energy sources. Increased biodiesel production promoted excess waste crude glycerol leading to environmental issues, thereby inhibiting the sustainability of the process. This review paper discusses the different types of feedstocks utilized to produce glycerol-free biodiesel by reacting with methyl acetate via interesterification. Methyl acetate is used as an advantageous alternative to methanol in biodiesel production to overcome the environmental challenge associated with excess waste glycerol. The by-product, triacetin from the interesterification reaction, has shown excellent qualities as a fuel additive, thereby making the process cleaner and more sustainable as a result of not separating the triacetin from biodiesel. The resulting product referred to as biodiesel fuel (BDF) has been found to exhibit useful properties and applications as fatty acid methyl esters (FAME). The promising environmental and sustainability merits of the process far outweigh the slow interesterification kinetics demerits of the process, which can be overcome by suitable processing conditions. The prospects associated with biodiesel production by interesterification are also pointed out.

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Evaluation of post synthesis treatments over commercial ZSM-5 zeolite in the reaction route of oleic acid esterification with methyl acetate

Ribeiro

Enzweiler

Castilhos

2021

Reac Kinet Mech Cat

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Esters production in continuous reactor from macauba pulp oil using methyl acetate in pressurized conditions

Cited by 24 publications

References 42 publications

Use of the Product from Low Pressure Extraction (Crambe Seed Oil and Methyl Acetate) for Synthesis of Methyl Esters and Triacetin Under Supercritical Conditions

Use of the Product from Low Pressure Extraction (Crambe Seed Oil and Methyl Acetate) for Synthesis of Methyl Esters and Triacetin Under Supercritical Conditions

A concise review on alternative route of biodiesel production via interesterification of different feedstocks

Evaluation of post synthesis treatments over commercial ZSM-5 zeolite in the reaction route of oleic acid esterification with methyl acetate

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