Oxidation reactions and spontaneous ignition of linseed oil

Juita,; Dlugogorski, Bogdan Z.; Kennedy, Eric M.; Mackie, John C.

doi:10.1016/j.proci.2010.06.096

Cited by 21 publications

(26 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Cobalt(II) nitrate hexahydrate was employed to check the tendency of linseed oil to self ignite. Experiments involving cotton wool impregnated with cobalt(II) nitrate illustrated that ignition occurred at an initial temperature of 82 ºC [4]. This highlights the important role that cobalt plays in the spontaneous combustion.…”

Section: Resultsmentioning

confidence: 88%

“…Our previous study illustrated the performance of several transition metal salts which we found to catalyse the oxidation reactions of linseed oil. Cobalt(II) is the most effective catalyst among other transition metal salts, which we studied, followed by manganese(II) and iron(II) [4]. Ignition experiments have been undertaken in order to investigate the spontaneous combustion of cotton rags doused with linseed oil.…”

Section: Resultsmentioning

confidence: 99%

“…The weak allylic H-bonds in the molecules in linseed oil represent a facile target for initial radical attack. Initiation reaction would be expected to proceed with the abstraction of an allylic hydrogen atom from the molecules to form a free, but stable, allylic radical [4]. The allylic-type radical can undergo the addition of molecular O 2 to form a peroxy radical.…”

Section: Resultsmentioning

confidence: 99%

“…This oil is characterized by high levels of linolenic acid [1]. Typical linseed oil contains triglyceride esters of monocarboxylic fatty acids, including palmitic acid (16:0, 6-7 %), stearic acid (18:0, 3-6 %), oleic acid (18:1, 14-24 %), linoleic acid (18:2, 14-19 %) and linolenic acid (18:3, 48-60 %) [3], where the first number in each ratio indicates the length of the carbon chain and the second corresponds to the number of unsaturated bonds [4]. The drying propensity of fatty acid depends on several factors such as the number of double bonds, the conjugated arrangement and the trans isomerism [5].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Linseed Oil and its Tendency to Self-Heat

Dlugogorski¹,

Kennedy²,

Mackie³

2011

Fire Safety Science - Proceedings of the 10th International Sym

View full text Add to dashboard Cite

Several varieties of linseed oil are commercially available, and they have been used for many applications especially in decorative furniture finishing and as an oil painting medium. The addition of metallic driers to the linseed oil is a common practice, as it improves the drying rate of the paint. Several cases of fires have been reported, often involving rags soaked with linseed oil which have not been disposed of properly, and it is generally agreed that metal salts in the linseed oil play an important role in the spontaneous ignition of the oil. This paper investigates several types of linseed oil sold in the market and their tendency to cause self-heating of cotton which has been impregnated with linseed oil obtained from various sources.Experiments were performed in two reactors; a plug flow reactor for measurement of gaseous oxidation products and in a batch system for the determination of metal composition in the oil. Both plug flow and batch systems employ fifty percent of oxygen and nitrogen mixtures for several hours in each experiment. Emission of gaseous products during the reaction was quantified by micro gas chromatography (µGC), and identified by Fourier transform infrared spectroscopy (FTIR) and gas chromatography-mass spectrometry (GC-MS). Oil samples from batch system were digested using microwave and the metal composition was determined by inductively coupled plasma-optical emission spectrometer (ICP-OES).Boiled linseed oil is the most reactive oil studied, followed by raw linseed oil and refined linseed oil which display similar reactivity, while the least reactive is stand linseed oil. ICP analysis confirmed the presence of cobalt in the boiled linseed oil, which enhances the rate of oxidation reaction. For boiled linseed oil, the cobalt in the oil enhances the decomposition of peroxide resulting in the formation of various radicals which oxidize the oil and the cotton wool, therefore the emission of gaseous products is higher during oxidation on the cotton wool support compared to glass wool and thus boiled linseed oil has the highest tendency to self heat, especially if soaked on the cotton or rags.A kinetic model of peroxide formation and decomposition has been developed based on the experimental data. The reaction rate constant of the decomposition of peroxide has been found to be higher in the reaction using cobalt compared to that of without cobalt, confirming the role of cobalt in catalysing the peroxide decomposition reaction. Abstraction reactions by the radicals during oxidation lead to subsequent reactions which are generally very exothermic. Accumulation of sufficient heat, can ultimately lead to the temperature reaching the ignition point of the oil and causing the self-heating and even ignition of the oil.

show abstract

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Linseed Oil and its Tendency to Self-Heat

Dlugogorski¹,

Kennedy²,

Mackie³

2011

Fire Safety Science - Proceedings of the 10th International Sym

View full text Add to dashboard Cite

show abstract

“…The triglycerides of linseed oil contain five major fatty acids, [Juita et al, 2011] depicted in Table 1.…”

Section: Fatty Acid Profile Of Linum Usitatissimum Seed Oilmentioning

confidence: 99%

Optimization of degummed Linum usitatissimum methyl ester from methanolysis as a potential resource for diesel engines

Kanakraj¹

2013

Electron. J. Energy Envron.

View full text Add to dashboard Cite

R E S E A R C HABSTRACT Studies were carried out on the methanolysis of crude and degummed Linum usitatissimum seed oil with methanol for methyl ester synthesis. In this study, response surface methodology was applied in order to optimize the reaction factors for methyl ester synthesis. The present work also studies the experimental conditions such as catalyst concentration, molar ratio (methanol:oil) and reaction time on the conversion of Linum usitatissimum seed oil to methyl esters. The conversion was above 96.2% under the condition of 60 ºC, methanol-oil molar ratio of 8:1, reaction time of 60 minutes and catalyst concentration (catalyst/oil) of 0.6 wt%. The resulting methyl esters (biodiesel) and its diesel blends were characterized for basic fuel properties including density, viscosity, cloud and pour point, flash and fire point, calorific value and acid value. The results show that the enzymatic degummed Linum usitatissimum seed oil used with a phosphorus (phospholipids) level of 9.8 ppm provides an excellent methyl ester yield of over 96.2% and basic fuel properties of these blends are comparable to those of conventional diesel fuel at 20% of methyl esters concentrations.

show abstract

The influence of oil content within lignocellulosic filler on thermal degradation kinetics and flammability of polylactide composites modified with linseed cake

et al. 2020

View full text Add to dashboard Cite

Linseed cake (LC), a by-product of oil extraction from linseed, due to high content of natural oil can be applied as a filler and modifying agent for polymeric composites. However, the presence of the flammable oil may change thermal properties of the resulting materials. The aim of this study is evaluation of the influence of oil content on flammability and thermal degradation of polylactide composites. The samples filled with 10 wt% of LC containing from 0.9% to 39.8% of oil were subjected to cone calorimetry, horizontal burning test and thermogravimetric analysis. Activation energy values of the thermal decomposition of the composites were calculated using Ozawa and Kissinger methods. The different LC grades and the crude oil were tested as well. Even though all the composite grades presented higher flammability and lower thermal stability than the neat resin, their burning behavior and the process of thermal decomposition did not depend on the oil content. Therefore, the oil-rich grades of LC can be applied as an effective filler for polylactide without an increase in fire risk.

show abstract

Oxidation reactions and spontaneous ignition of linseed oil

Cited by 21 publications

References 21 publications

Linseed Oil and its Tendency to Self-Heat

Linseed Oil and its Tendency to Self-Heat

Optimization of degummed Linum usitatissimum methyl ester from methanolysis as a potential resource for diesel engines

The influence of oil content within lignocellulosic filler on thermal degradation kinetics and flammability of polylactide composites modified with linseed cake

Contact Info

Product

Resources

About