Environmental impacts of valorisation of crude glycerol from biodiesel production – A life cycle perspective

Tomatis, Marco; Kumar Jeswani, Harish; Azapagic, Adisa

doi:10.1016/j.wasman.2024.03.005

Waste Management

2024

DOI: 10.1016/j.wasman.2024.03.005

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Environmental impacts of valorisation of crude glycerol from biodiesel production – A life cycle perspective

Marco Tomatis,

Harish Kumar Jeswani,

Adisa Azapagic

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Cited by 3 publications

References 43 publications

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Synthesis, characterization and application of polyesters from diglycerol and triglycerol as lubricants and additives

de Brito,

Schuller,

Cavalcante

et al. 2024

J Americ Oil Chem Soc

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Glycerol is produced on a large scale as a byproduct in the biodiesel market. In order to give an application to glycerol, this work uses diglycerol from synthesized polyglycerol and commercial triglycerol in the synthesis of long chain esters obtained from esterification and transesterification reactions with oleic acid, methyl oleate, and epoxidized methyl oleate. Diglycerol tetraoleate (DGMO), epoxidized diglycerol tetraoleate (DGEMO), and triglycerol pentaoleate (TGOA) were synthesized and characterized by 1H and 13C Nuclear Magnetic Resonance (NMR) and infrared (IR) spectroscopy. Polyglycerol esters were evaluated for basic lubrication properties such as density, kinematic viscosity, viscosity index, melting point, and thermo‐oxidative stability. The ester that showed best thermo‐oxidative stability was DGEMO. In addition, the influence of esters synthesized as additives in a pure paraffinic oil lubricant was evaluated and the TGOA showed greater change in viscosity at 100 and 40°C and in melting point which was increased by 1.56°C.

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Synthesis, characterization and application of polyesters from diglycerol and triglycerol as lubricants and additives

de Brito,

Schuller,

Cavalcante

et al. 2024

J Americ Oil Chem Soc

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Environmental performance of three innovative leather production processes using less chromium and water

Ardolino,

Parrillo,

Arena

2024

Sustainable Production and Consumption

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Influence of Synthesis Conditions on Catalytic Performance of Ni/CeO2 in Aqueous-Phase Hydrogenolysis of Glycerol without External Hydrogen Input

Jarauta-Córdoba,

García,

Ruiz

et al. 2024

Molecules

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The aqueous-phase hydrogenolysis of glycerol was studied in Ni/CeO2 catalytic systems prepared by incipient wetness impregnation. The operating conditions were 34 bar, 227 ºC, 5 wt.% of glycerol, and a W/mglycerol = 20 g catalyst min/g glycerol without a hydrogen supply. The effect of the catalyst preparation conditions on the catalytic activity and physicochemical properties of the catalysts was assessed, particularly the calcination temperature of the support, the calcination temperature of the catalyst, and the Ni content. The physicochemical properties of the catalysts were determined by N2 adsorption, H2-TPR, NH3-TPD, and XRD, among other techniques. A relevant increase in acidity was observed when increasing the nickel content up to 20 wt.%. The increase in the calcination temperatures of the supports and catalysts showed a detrimental effect on the specific surface area and acid properties of the catalysts, which were crucial to the selectivity of the reaction. These catalysts notably enhanced the yield of liquid products, achieving global glycerol conversion values ranging from 17.1 to 29.0% and carbon yield to liquids ranging from 12.6 to 24.0%. Acetol and 1,2-propanediol were the most abundant products obtained in the liquid stream.

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Environmental impacts of valorisation of crude glycerol from biodiesel production – A life cycle perspective

Cited by 3 publications

References 43 publications

Synthesis, characterization and application of polyesters from diglycerol and triglycerol as lubricants and additives

Synthesis, characterization and application of polyesters from diglycerol and triglycerol as lubricants and additives

Environmental performance of three innovative leather production processes using less chromium and water

Influence of Synthesis Conditions on Catalytic Performance of Ni/CeO2 in Aqueous-Phase Hydrogenolysis of Glycerol without External Hydrogen Input

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