Supercritical fluid technology in biodiesel production

Hoang, Dung; Bensaid, Samir; Saracco, Guido

doi:10.1515/gps-2013-0046

Cited by 11 publications

(7 citation statements)

References 62 publications

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“…In methanol, the hydrogen bond network is broken under supercritical conditions, this reduction in hydrogen bonding will encourage a stronger direct nucleophilic attack by methanol on the carbonyl group. The dielectric constant of methanol also decreases at supercritical state and this will lead to an elevation in reaction rate [128]. Nevertheless, the selection of alcohol is vital for evaluating the cost and performance.…”

Section: Supercritical Fluid Methodsmentioning

confidence: 99%

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Waste to bioenergy: a review on the recent conversion technologies

et al. 2019

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Scientific studies have demonstrated that it is possible to generate a wide variety of bioenergy from biomass residues and waste, and however its cost is not competitive with petro-fuels and other renewable energy. Ongoing efforts are continued extensively to improve conversion technologies in order to reduce production costs. The present review focuses on the conversion technologies for transforming biomass residues and waste to biofuels, specifically their technological concepts, options and prospects for implementation are addressed. The emerging developments in the two primary conversion pathways, namely the thermochemical (i.e. gasification, liquefaction, and pyrolysis) and biochemical (i.e. anaerobic digestion, alcoholic fermentation and photobiological hydrogen production) conversion techniques, are evaluated. Additionally, transesterification, which appears to be the simplest and most economical route to produce biodiesel in large quantity, is discussed. Lastly, the strategies for direct conversion of biomass residues and waste to bioelectricity including the use of combustion and microbial fuel cells are reviewed.

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Section: Supercritical Fluid Methodsmentioning

confidence: 99%

“…Besides, alcohol with higher or branched structure is able to produce fuels with better properties. The extra carbon atom provided by ethanol can slightly increase the heat content and cetane number [128].…”

Section: Supercritical Fluid Methodsmentioning

confidence: 99%

Waste to bioenergy: a review on the recent conversion technologies

et al. 2019

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“…Biodiesel synthesis using WFO as feedstock is a challenging task as it typically contains some undesirable components, i.e., free fatty acids (FFA) and water (Jacobson et al, 2008). Several studies (Demirbas, 2009;Hoang et al, 2013) reported that the feedstock containing a significant amount of FFA and water may inhibit the transesterification process to optimize biodiesel production. This is because FFA would react with the catalyst to form soap and inhibit the separation of biodiesel from glycerol.…”

Section: Darwin Atmadian Pratama Mardhotillahmentioning

confidence: 99%

Biodiesel Production from Waste Frying Oils by Potassium Methoxide Supported on Activated Carbon Catalysts from Lignocellulosic Biomass

Darwin

Pratama

Mardhotillah

2021

Acta Technologica Agriculturae

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Various carbon-rich solid catalysts are evaluated for the synthesis of biodiesel from waste frying oil. The study results showed that the use of activated carbon made of corn stalk could increase the biodiesel yield by 7%. The heterogeneous carbon-based catalysts made of lignocellulosic residues could successfully improve the quality of biodiesel properties. The results obtained revealed that the biodiesel properties, including relative density (852–900 kg·m−3) and kinematic viscosity (2.4–3.9 mm2·s−1), are in compliance with the standard limits of ASTM and the European Biodiesel Standard, suggesting that the biodiesel produced would be decent as a diesel fuel that potentially can minimize the serious damage of engine parts, and prolong the engine life.

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“…Likewise, this reaction has been studied over heterogeneous acid catalysts [68][69][70][71][72][73][74][75][76][77][78][79] as well as using lipases as biocatalysts, either in solvent-free systems [80][81][82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97] or in ionic liquids [98][99][100][101]. Furthermore, many other innovative technologies have also been applied, such as supercritical conditions [102][103][104][105][106][107][108][109][110][111][112][113][114][115][116]<...>…”

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

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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Supercritical fluid technology in biodiesel production

Cited by 11 publications

References 62 publications

Waste to bioenergy: a review on the recent conversion technologies

Waste to bioenergy: a review on the recent conversion technologies

Biodiesel Production from Waste Frying Oils by Potassium Methoxide Supported on Activated Carbon Catalysts from Lignocellulosic Biomass

Biodiesel at the Crossroads: A Critical Review

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