A comparative study on biodiesel production from edible and non-edible biomasses

Emmanouilidou, Elissavet; Lazaridou, Anastasia; Mitkidou, Sophia; Kokkinos, Nikolaos C.

doi:10.1016/j.molstruc.2024.137870

Cited by 14 publications

(5 citation statements)

References 38 publications

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“…The H atom then forms a Pd–H active bond with Pd, which coordinates with the double bond and transfers H to the double bond of methyl eleostearate . In the meantime, the relative oxidation rates of C18:1/C18:2/C18:3 are 1:40:100; hence, C18:1 showcases high selectivity. Thus, under UV light, Pd and pg-C 3 N 4 synergistically promote the selective hydrogenation of methyl eleostearates.…”

Section: Resultsmentioning

confidence: 99%

“…Among them, selective hydrogenation of polyunsaturated fatty acids to monounsaturated fatty acids is promising. Generally, this process can be classified into two categories: hydrogen reduction and catalytic transfer hydrogenation (CTH). − Hydrogen reduction uses H 2 as a hydrogen source, while CTH utilizes stable hydrogen donors such as formic acid, formate, sodium borohydride, and isopropyl alcohol as a hydrogen source. Laverdura et al studied the partial hydrogenation of canola rapeseed oil over Lindlar catalysts using H 2 as a hydrogen source.…”

Section: Introductionmentioning

confidence: 99%

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Photoinduced Selective Hydrogenation of Methyl Eleostearate to Monounsaturated Fatty Acid Methyl Esters

Hang,

Cai,

Shi

et al. 2024

ACS Sustainable Chem. Eng.

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Selective hydrogenation of plant oils is an important step in the production of oleochemicals. In this work, a new protocol for photoinduced selective hydrogenation of methyl eleostearates under aqueous conditions has been reported. Using palladium supported on porous graphitic carbon nitride (Pd/pg-C 3 N 4 ) as a heterogeneous catalyst, formic acid as a hydrogen donor instead of potentially dangerous hydrogen gas, and water as a solvent, methyl eleostearates could be selectively transformed into monounsaturated fatty acid methyl esters (C18:1), which show a high selectivity of >90% under room temperature. The excellent selectivity is attributed to the synergistic effects of the Pd nanoparticles with pg-C 3 N 4 . Subsequently, dimethyl 1,19-nonadecanedioate (C19 α,ω-diesters) was prepared by isomerizing alkoxycarbonylation of the synthesized C18:1 product. The purity of the C19 α,ω-diester monomer is calculated to be higher than 96%, which is critical for the production of polymeric materials.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photoinduced Selective Hydrogenation of Methyl Eleostearate to Monounsaturated Fatty Acid Methyl Esters

Hang,

Cai,

Shi

et al. 2024

ACS Sustainable Chem. Eng.

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“…Esterification and transesterification are the primary processes used in the manufacturing of biodiesel [4]. Researchers have centered on problems including (1) inexpensive raw materials, (2) reusable catalysts, and (3) effective reactors to carry out transesterification reactions to accomplish sustainable goals in the production of biodiesel [5][6][7]. In addition to that, the conversion of biomass to biofuels and life cycle assessment is also one of the most important aspects for policy decisions as biofuels should be based on evidence that biofuels are produced in a sustainable manner [8].…”

Section: Introductionmentioning

confidence: 99%

A Green Nanocatalyst for Fatty Acid Methyl Ester Conversion from Waste Cooking Oil

Khosa,

Rani,

Saeed

et al. 2024

Catalysts

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This study used a novel combination of cellulose nanocrystals (CNCs) and calcium oxide (CaO) nanocomposite (CaO/CNCs) for the production of biodiesel from waste cooking oil. The filter paper was used as a raw cellulose source to produce the CNCs from the acid hydrolysis of cellulose with sulfuric acid. The as-synthesized CaO/CNC nanocomposite is recyclable and environmentally friendly and was characterized using Fourier transform infrared spectroscopy, energy dispersive X-ray, scanning electron microscopy, and X-ray diffraction. The optimum process parameters investigated are a 20:1 methanol-to-oil molar ratio, 3-weight percent catalyst concentration, 60 °C temperature, and 90 min of reaction time. Under the optimum conditions, a biodiesel yield of 84% was obtained. The CaO/CNC nanocomposite achieved five times reusability, indicating its effectiveness and reusability in the transesterification reaction. The synthesized biodiesel chemical composition was examined using FTIR, GCMS, 1H-NMR, and 13C-NMR, and its properties, including specific gravity, color, flash point, cloud point, pour point, viscosity, sulfur content, sediments, water content, total acid number, cetane number, and corrosion test, were ascertained using ASTM standard practices. The outcomes were determined to fulfill global biodiesel standards (ASTM 951, 6751). Five successive transesterification processes were used to test the regeneration of the catalyst; the first three showed no distinct change, while the fifth cycle showed a reduction of up to 79%. The innovative composite CaO/CNC and used cooking oil are stable, affordable, and extremely successful for long-term biodiesel generation.

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“…The main industrial application of lipases is in the hydrolysis of fats and oils; although, their use in the transesterification of oils for biodiesel synthesis is increasing [25,26]. In waste cooking oil, residual fats from frying foods, such as vegetables and meats, are mixed with cooking oil [27]. Waste cooking oil also contains glycerol esters, which can be dissolved in organic solvents [28].…”

Section: Introductionmentioning

confidence: 99%

“…In addition to being environmentally friendly, biodiesel can be made from these waste materials without causing competition with food sources [29]. Furthermore, it is more economical than fresh vegetable oil, costing two to three times less [27].…”

Section: Introductionmentioning

confidence: 99%

Thermostable CaCO3-Immobilized Bacillus subtilis Lipase for Sustainable Biodiesel Production from Waste Cooking Oil

Alshehri,

Alghamdi,

Khalel

et al. 2024

Catalysts

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Due to the increasing demand for green processes in renewable energy production, the extracellular Bacillus subtilis B-1-4 lipase was used as a biocatalyst for producing biodiesel from waste cooking oil. Response surface methodology was employed for the optimization of enzyme production. Lipase activity was modeled with a quadratic function of four factors that primarily influence the culture medium. Thanks to this model, an optimal lipase activity of 1.7 ± 0.082 U/mL was achieved with the best culture medium composition: 16 g/L of tryptone, 15 g/L of yeast extract, 15 g/L of NaCl, and a 0.15 initial optical density at 600 nm (OD600 nm). The maximal lipase activity was measured at 45 °C and pH 8, using para-nitrophenyl palmitate as a substrate. The enzyme maintained above 94% and 99% of its initial activity at temperatures ranging from 40 to 50 °C and at pH 8, respectively. Moreover, it exhibited a higher residual activity than other Bacillus lipases in the presence of organic solvents. Residual activities of 86.7% and 90.2% were measured in the presence of isopropanol and ethanol, respectively. The lipase was immobilized by adsorption onto CaCO3 powder. FT-IR and SEM were used to characterize the surface-modified support. After immobilization, a lipase activity of 7.1 U/mg of CaCO3 was obtained. Under the optimized conditions, the highest biodiesel yield of 71% was obtained through the transesterification of waste cooking oil using the CaCO3-immobilized Bacillus subtilis lipase. This research reveals a method for the utilization of waste cooking oil for biodiesel production using an efficient immobilized thermostable lipase, providing environmental and economic security.

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A comparative study on biodiesel production from edible and non-edible biomasses

Cited by 14 publications

References 38 publications

Photoinduced Selective Hydrogenation of Methyl Eleostearate to Monounsaturated Fatty Acid Methyl Esters

Photoinduced Selective Hydrogenation of Methyl Eleostearate to Monounsaturated Fatty Acid Methyl Esters

A Green Nanocatalyst for Fatty Acid Methyl Ester Conversion from Waste Cooking Oil

Thermostable CaCO3-Immobilized Bacillus subtilis Lipase for Sustainable Biodiesel Production from Waste Cooking Oil

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