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obligating the addition of biodiesel to the diesel consumed in Brazil, 1 billion liters of biodiesel are produced per year and, in most ordinary processes, with a co-production of 1 hundred thousand tons of glycerol [ 3 , 4 ]. Glycerol is a

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Introduction Glycerol is produced as a by-product with the amount as one tenth of biodiesel. With rapidly increasing production of biodiesel, much attention has been focused on the utilization of glycerol for producing value

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Introduction Glycerol is micromolecular colligative antifreeze that was first found in the eggs of the silk worm, Bombyx mori [ 1 ]. Other frigostable insects (such as the beetle Cucujus clavipes ) and fishes (such as

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groups [ 11 , 18 ], the understanding of the stabilization mechanism of proteins is still incomplete. In addition to this, glycerol occurs as a primary biomolecule in the intestine as a product of hydrolysis of lipids and also in the liver where it

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glycerol via transesterification of vegetable oil or animal fat with methanol or ethanol [ 1 ]. Due to the worldwide use of biodiesel, glycerol production increases rapidly [ 2 , 3 ]. Therefore, it is very important to exploit the added-value chemicals or

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Journal of Thermal Analysis and Calorimetry
Authors: Luciano N. Batista, Rosane A. S. San Gil, Luciana B. R. Lopes, and Vera L. P. Soares

Introduction Due to the success of the implementation of biofuel in Brazil, to its increase in production and to the gradual alteration of the ratio of biofuel in diesel oil, it became urgent to exploit the glycerol by

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Abstract  

During the last years, the demand for biofuels has increased significantly. In Brazil, a production of 1 billion liters of biodiesel was produced by the end of 2007, due to its obligatory use in the composition of the diesel for vehicle use. In this production, a hundred thousand tons of glycerol are produced as by-product, for which alternative uses are needed. As glycerol has already been studied by other conventional characterization methods in the past, thermal analysis has been used mostly for characterization of sub ambient temperature properties of glycerol. In this paper, thermogravimetry (TG), derivative thermogravimetry (DTG) and differential thermal analysis (DTA) were used for its thermal characterization above room temperature. Thermal stability was determined from experimental data, which show that even in air, only a very small part of the volatilized glycerol is burned out. A thermogravimetric quantitative method was developed to determinate the water content of glycerol–water mixtures, which also was used to quantify the water impurity in pro-analysis samples of glycerol, showing compatible results with those obtained by Karl Fischer method.

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Abstract  

The catalytic properties of supported Cu/SBA-15 catalysts prepared by the ion-exchange method were investigated for the hydrogenolysis of glycerol in a fixed-bed tubular reactor. The Cu/SBA-15 catalyst performed higher selectivity to 1,2-propanediol and high stability. We propose that the larger specific surface area and the ordered mesoporous channels of SBA-15 may play important roles in stabilizing highly dispersed copper species, and forming an active and durable catalyst for the title reaction.

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Biodiesel is an alternative to fossil fuels. However, during production of biodiesel and its by-products, waste glycerol is also produced ( Roume et al., 2016 ). As the waste glycerol purification process is unprofitable, after biodiesel production

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Shibata, N., Ohmae, T., Hoshino, N., Minouchi, T., Yamaji, A.: Influence of glycerol-induced acute renal failure on the pharmacokinetics of cyclosporin. J. Pharm. Pharmacol. 51 , 397-404 (1988). Influence of glycerol

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