Supercritical Synthesis of Biodiesel

Bernal, Juan Manuel Zaragoza; Lozano, Pedro; García‐Verdugo, Eduardo; Burguete, M. Isabel; Sánchez‐Gómez, Gregorio; López-López, Gregorio; Pucheault, Mathieu; Vaultier, Michel; Luis, Santiago V.

doi:10.3390/molecules17078696

Cited by 69 publications

(29 citation statements)

References 96 publications

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“…The global shortage of fossil fuels and environmental concerns has sustained the interest in biodiesel production [19][20][21][22][23][24][25][26][27][28][29][30]. Biodiesel is a mixture of esters of long chain fatty acids and short chain monohydric alcohols (MeOH or EtOH).…”

Section: Introductionmentioning

confidence: 99%

Combi-protein coated microcrystals of lipases for production of biodiesel from oil from spent coffee grounds

Banerjee

Singh

Solanki

et al. 2013

sustain chem process

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Background: Replacing chemical catalysts with biocatalysts is a widely recognized goal of white biotechnology. For biocatalytic processes requiring low water containing media, enzymes for example commercial preparations of lipases, show low catalytic efficiencies. Some high activity preparations for addressing this concern have been described. Protein coated microcrystals (PCMC) constitute one such preparation. The present work describes a Combi-PCMC for synthesis of biodiesel from the oil extracted from spent coffee grounds. Results: Different lipases were screened for biodiesel synthesis from crude coffee oil out of which Novozym 435 gave the best conversion of 60% in 4 h. Optimization of reaction conditions i.e. % water, temperature and purification of coffee oil further enhanced conversion upto 88% in 24 h. A mixture of Novozym 435 and a cheap commercially available 1,3-specific lipase RMIM (from Mucor miehei) was used in different ratios and 1:1 was found to be the best trade-off between conversion and cost. The commercial preparations then were replaced by a novel biocatalyst design called Combi-Protein coated microcrystals (Combi-PCMC) wherein CAL B and Palatase were co-immobilized with K 2 SO 4 as the core and this performed equivalent to the commercial preparations giving 83% conversion in 48 h.

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Section: Introductionmentioning

confidence: 99%

Combi-protein coated microcrystals of lipases for production of biodiesel from oil from spent coffee grounds

Banerjee

Singh

Solanki

et al. 2013

sustain chem process

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show abstract

“…Indeed, the dielectric constant of methanol decreases from 34 to 5 upon isobaric heating from 25°C to 260°C at 20 MPa [44]. The hydrogen bond network existing in liquid methanol is broken under SC conditions, leading to a fluid in which only small oligomers exist.…”

Section: Scf Methanolmentioning

confidence: 99%

“…The use of supercritical fluids (SCFs) is an innovative approach to be used in various industrial applications [2,4,44]. Numerous research works concerning biodiesel synthesis via SCFs have been investigated and the summary of all current SCF techniques will be discussed in the next part of this review.…”

Section: Non-catalytic Processmentioning

confidence: 99%

“…In a catalytic reaction to produce biodiesel through transesterification, several post-reaction processes, such as purification of the esters, separation, and recovery of residual reactants and catalysts are involved [2,4,44]. These processes render the production of biodiesel transesterification system complicated, thus giving a reason to investigate the production of biodiesel from triglycerides via non-catalytic reactions.…”

Section: Non-catalytic Processmentioning

confidence: 99%

“…There are some unique characteristics associated with SCFs which allow them to be applied in different industrial applications [2,44]. One of the first applications of SCFs was the decaffeination of coffee with carbon dioxide (CO 2 ).…”

Section: Definitionmentioning

confidence: 99%

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Supercritical fluid technology in biodiesel production

Hoang

Bensaid

Saracco

2013

Green Processing and Synthesis

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Abstract:The synthesis of biodiesel has received attention as an alternative source of energy to decrease our dependence on petroleum-based fuels. The catalyzed processes present a series of limitations and drawbacks, among them the high energy required for complex purification and undesirable side reactions. Supercritical fluid (SCF) technology is being proved an efficient approach compared to traditional methods for preparing biodiesel. This review illustrates the advances, advantages, and drawbacks involved in the use of all current biodiesel production technologies.Keywords: biodiesel; catalyst; non-catalytic; supercritical fluid; transesterification. List of abbreviationsBDF, biodiesel fuel; FA, fatty acid; FFA, free fatty acid; FAAE, fatty acid alkyl ester; FAME, fatty acid methyl ester; FAEE, fatty acid ethyl

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Optimization of the esterification reaction of free fatty acids present in waste salmon oil

Marchetti

2022

Biofuels Bioprod Bioref

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Biodiesel is gaining importance as a substitute for diesel with special focus on the transportation sector due to its advantages over petroleum‐based alternatives. Waste fish oil was used as a feedstock for this study, and an acid pre‐esterification process was examined. The effects of three main variables on the biodiesel yield were studied and their combined effects were investigated. Temperature, molar ratio, and catalysts were varied and the remaining parameters were kept constant. A quadratic model was found to fit the experimental data best, with a regression coefficient of 0.82. An increase in the reaction temperature led to an increase in the reaction yield. However, this increase became considerably weaker after 323 K. The reactant molar ratio and the catalysts amount had a similar tendency within the domain under consideration – the product yield increased for all operational conditions evaluated. It was found that the optimal predict yield was 96.29% for a reaction temperature of 325.53 K, a molar ratio of 8.37, and 3.93 wt% of catalyst. © 2022 The Authors. Biofuels, Bioproducts and Biorefining published by Society of Industrial Chemistry and John Wiley & Sons Ltd.

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Supercritical Synthesis of Biodiesel

Cited by 69 publications

References 96 publications

Combi-protein coated microcrystals of lipases for production of biodiesel from oil from spent coffee grounds

Combi-protein coated microcrystals of lipases for production of biodiesel from oil from spent coffee grounds

Supercritical fluid technology in biodiesel production

Optimization of the esterification reaction of free fatty acids present in waste salmon oil

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