Utilization of Crude Glycerol from Biodiesel Industry for the Production of Value-Added Bioproducts

Chozhavendhan, S.; Kumar, R.; Elavazhagan, S.; Barathiraja, B.; Jayakumar, M.; Varjani, Sunita

doi:10.1007/978-981-10-7431-8_4

Cited by 25 publications

(16 citation statements)

References 73 publications

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“…Also, we have considered that the product concentrations are identical (C W = C MG ). In this way, by rearranging Equation (12) and assuming that K A • C I • C Gly ≈ 0 and K B • C 2 MG ≈ 0, we obtain Equation 13:…”

Section: Kinetic Modellingmentioning

confidence: 99%

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Synthesis of Ibuprofen Monoglyceride in Solventless Medium with Novozym®435: Kinetic Analysis

et al. 2020

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This study investigates the enzymatic esterification of glycerol and ibuprofen in a solventless medium catalyzed by immobilized lipase B from Candida antarctica (Novozym®435). Fixing the concentration of this enzymatic solid preparation at 30 g·L−1, and operating at a constant stirring speed of 720 rpm, the temperature was changed between 50 and 80 °C, while the initial concentration of ibuprofen was studied from 20 to 100 g·L−1. Under these conditions, the resistance of external mass transport can be neglected, as confirmed by the Mears criterion (Me < 0.15). However, the mass transfer limitation inside the pores of the support has been evidenced. The values of the effectiveness factor (η) vary between 0.08 and 0.16 for the particle size range considered according to the Weisz–Prater criteria. Preliminary runs permit us to conclude that the enzyme was deactivated at medium to high temperatures and initial concentration values of ibuprofen. Several phenomenological kinetic models were proposed and fitted to all data available, using physical and statistical criteria to select the most adequate model. The best kinetic model was a reversible sigmoidal model with pseudo-first order with respect to dissolved ibuprofen and order 2 with respect to monoester ibuprofen, assuming the total first-order one-step deactivation of the enzyme, with partial first order for ibuprofen and enzyme activity.

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Section: Kinetic Modellingmentioning

confidence: 99%

“…Glycerol is a plentiful by-product of the biodiesel manufacturing process. Owing to the saturation of the glycerol market, the price of this chemical has dropped in the last years [1,2]. Therefore, new uses of this polyol are being investigated as glycerol is looked upon as the new C3 platform chemical [1,3].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ibuprofen Monoglyceride in Solventless Medium with Novozym®435: Kinetic Analysis

et al. 2020

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“…An additional source derives from the biodiesel industry that provides glycerol as the main by-product of the transesterification reaction of triglycerides with methanol or ethanol and glycerol availability is foreseen to reach 4 billion gallons by 2020 [9]. The use of a polyalcohol, such as glycerol, allows one to obtain branched ethers that possess very interesting features as diesel additives due to their excellent combustion properties, good blending ability, and high cetane number [10].…”

Section: Biomass Bio -Alcoholsmentioning

confidence: 99%

Solid Acids for the Reaction of Bioderived Alcohols into Ethers for Fuel Applications

2019

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The use of solids acids in the synthesis of ethers suitable to be used as fuels or fuel additives were reviewed in a critical way. In particular, the role of Brønsted and Lewis acid sites was highlighted to focus on the pivotal role of the acidity nature on the product distribution. Particular emphasis is given to the recently proposed ethers prepared starting from furfural and 5-hydroxymethyl furfural. Thus, they are very promising products that can be derived from lignocellulosic biomass and bioalcohols and possess very interesting chemical and physical properties for their use in the diesel sector.

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“…Disposal of crude glycerol, which contains salt, methanol, free fatty acids, residual catalyst, etc., represents an economic and environmental challenge. The high cost of purification and market saturation behooves biodiesel producers to seek cheaper and alternate ways to utilize crude glycerol [31]. The presence of impurities has a negative effect on the fermentation process by inhibiting product formation.…”

Section: Introductionmentioning

confidence: 99%

Crude Glycerol as an Innovative Corrosion Inhibitor

Zubaidi

Jones

Alzughaibi

et al. 2018

ASI

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Crude glycerol, a byproduct of biodiesel production, was evaluated as a potential green inhibitor for steel corrosion in an acidic environment. The study was conducted using steel specimens placed in hydrochloric acid solutions (0.5 M) at a constant room temperature (25 • C) and crude glycerol concentrations in the range 0.1%-1.0% w/w. The criteria used to evaluate the extent of corrosion were the weight loss and corrosion rate. Additionally, fresh and spent samples were characterized using scanning electron microscopy and potentiodynamic polarization measurements. It was found that, generally, the corrosion inhibition increased with the inhibitor concentration. Results also showed that the maximum inhibition efficiency was achieved at 70 h residence time after which the inhibition efficiency at a given concentration either remained unchanged or dropped slight. Additionally, the overall maximum inhibition efficiency (98%) was observed at 70 h residence time and a 1% inhibitor concentration.

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Utilization of Crude Glycerol from Biodiesel Industry for the Production of Value-Added Bioproducts

Cited by 25 publications

References 73 publications

Synthesis of Ibuprofen Monoglyceride in Solventless Medium with Novozym®435: Kinetic Analysis

Synthesis of Ibuprofen Monoglyceride in Solventless Medium with Novozym®435: Kinetic Analysis

Solid Acids for the Reaction of Bioderived Alcohols into Ethers for Fuel Applications

Crude Glycerol as an Innovative Corrosion Inhibitor

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