Lipid-based biofuel synthesized from palm-olein oil by supercritical ethyl acetate in fixed-bed reactor

Sakdasri, Winatta; Ngamprasertsith, Somkiat; Daengsanun, Sirisopa; Sawangkeaw, Ruengwit

doi:10.1016/j.enconman.2018.12.041

Cited by 20 publications

(15 citation statements)

References 44 publications

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“…[ 30 ] In contrast, continuous flow reactors have the advantage of better heat and mass transfer. [ 51 ] In a study by Sakdarsi et al., [ 26 ] the reaction was conducted using ethyl acetate, with a higher temperature and longer residence time compared with this research, requiring greater energy consumption and, as mentioned above, the application of a temperature above 300 °C can cause the thermal decomposition of the products of the reaction. The other authors reported results close to those obtained in this study, using methyl acetate as an acyl acceptor.…”

Section: Resultsmentioning

confidence: 96%

“…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: 96%

Section: Introductionmentioning

confidence: 99%

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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“…4. Recently, supercritical carboxylate esters in novel reactors, i.e., micro-reactors and fixed-bed reactors [51][52][53][54][55], as well as a two-step method [46], have been proposed as ways to increase the efficiency and quality of biofuel production. Fig.…”

Section: Carboxylate Estersmentioning

confidence: 99%

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2021

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Supercritical transesterification of lipid-based biomasses, a recent technique to produce biofuel without a catalyst, is discussed. This review focused on a glycerol-free process. The supercritical reactants include dimethyl carbonate, diethyl carbonate, methyl acetate, ethyl acetate (ETA), and methyl tert-butyl ether. The by-products from the glycerolfree process can improve both the quantity and quality of the resultant biofuel. This review suggests that supercritical transesterification of lipid-based biomasses using ETA as a coreactant can provide the most valuable advantages, as involves inexpensive and renewable resources, which are important for biofuel production and sustainability.

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“…Regarding the investigations carried out on the blends triacetin/biodiesel and triacetin/diesel, the combination of 10% by weight of triacetin with biodiesel is the one that shows the best results [155][156][157][158][159][160][161][162][163][164][165][166][167][168][169][170]. Finally, beneficial effects of triacetin on the cloud point and cold filter plugging point have also been revealed in several studies [171][172][173]. About the economic viability of the process of interesterification of triglycerides with methyl or ethyl esters Authors studied several reaction conditions, i.e., oil/methyl acetate molar ratio in the range 1:3 to 1:9, and temperatures in the range of 40-200 • C. This biofuel exhibited similar properties as biodiesel, although the obtention process of Gliperol improves the yield, the efficiency, and the economic feasibility of the conventional biodiesel obtention process.…”

Section: Biodiesel-like Biofuels That Integrate Glycerol As Glycerol mentioning

confidence: 99%

“…In addition, the pour point and the cold filter plugging point were also improved with only a small effect on cloud point and crystallization temperature. A combination of both, acetals and cold-flow improver, is proposed as an optimal method to improve cold flow properties [173]. Thus, this innovative chemical process uses whichever oil and glycerol as reagents and yields esters of glycerol formal FAGE, which can be part of a blending component in diesel fuels.…”

Section: Biodiesel-like Biofuels That Integrate Glycerol As Monoglycementioning

confidence: 99%

Biodiesel at the Crossroads: A Critical Review

et al. 2019

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The delay in the energy transition, focused in the replacement of fossil diesel with biodiesel, is mainly caused by the need of reducing the costs associated to the transesterification reaction of vegetable oils with methanol. This reaction, on an industrial scale, presents several problems associated with the glycerol generated during the process. The costs to eliminate this glycerol have to be added to the implicit cost of using seed oil as raw material. Recently, several alternative methods to convert vegetable oils into high quality diesel fuels, which avoid the glycerol generation, are being under development, such as Gliperol, DMC-Biod, or Ecodiesel. Besides, there are renewable diesel fuels known as “green diesel”, obtained by several catalytic processes (cracking or pyrolysis, hydrodeoxygenation and hydrotreating) of vegetable oils and which exhibit a lot of similarities with fossil fuels. Likewise, it has also been addressed as a novel strategy, the use of straight vegetable oils in blends with various plant-based sources such as alcohols, vegetable oils, and several organic compounds that are renewable and biodegradable. These plant-based sources are capable of achieving the effective reduction of the viscosity of the blends, allowing their use in combustion ignition engines. The aim of this review is to evaluate the real possibilities that conventional biodiesel has in order to success as the main biofuel for the energy transition, as well as the use of alternative biofuels that can take part in the energy transition in a successful way.

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Lipid-based biofuel synthesized from palm-olein oil by supercritical ethyl acetate in fixed-bed reactor

Cited by 20 publications

References 44 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

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Biodiesel at the Crossroads: A Critical Review

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