Kinetics of the thermal decomposition of oil shale from Puertollano (Spain)

Torrente, M. C.; Galán, Miguel Á.

doi:10.1016/s0016-2361(00)00101-0

Cited by 122 publications

(74 citation statements)

References 14 publications

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“…Olivella and Heras [32] performed linear kinetic methods for pyrolysis of Spanish coals and oil shale and found mean values of apparent activation energies of Ribesalbes oil shale (Type I-S) to be between 195 and 286 kJ/mol. Torrente and Galan [4] obtained apparent activation energy of 167 kJ/mol for non-isothermal TGA of Puertollano (Spain) oil shale. Sonibare et al [33] performed non-isothermal TGA on Lokpanta oil shales (Nigeria) and found the apparent activation energies to vary from 73.2 to 75 kJ/mol.…”

Section: Kinetics Of Thermal Decompositionmentioning

confidence: 99%

“…Thermogravimetric analysis (TGA) of oil shale samples has been extensively used as a means of determining pyrolysis characteristics and also to determine kinetic parameters [3][4][5][6][7][8]. Non-isothermal thermogravimetry (TG) has been applied in the study of the kinetics of thermal decomposition of Green River oil shale kerogen [3].…”

Section: Introductionmentioning

confidence: 99%

“…Kerogen decomposes to intermediate bitumen and the pyrolytic bitumen further decomposes into oil, gas and carbonaceous residue. Torrente and Galan [4] studied the kinetics of thermal decomposition of oil shale from Puertollano (Spain) by isothermal and non-isothermal thermogravimetry analyses. They reported that decomposition of the shale could be described by overall first-order kinetics.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study of the Kinetics and Mechanisms of Thermal Decomposition of Moroccan Tarfaya Oil Shale and Its Kerogen

Aboulkas¹,

Harfi²

2008

Oil Shale

128

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Section: Kinetics Of Thermal Decompositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study of the Kinetics and Mechanisms of Thermal Decomposition of Moroccan Tarfaya Oil Shale and Its Kerogen

Aboulkas¹,

Harfi²

2008

Oil Shale

128

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“…Primary products of pyrolysis are liquid, gas, and coke. The extent of decomposition (yield) and the quality of pyrolysis products depend on the composition of the source material, [5][6][7] the temperature-time history, 8,9 pressure, [10][11][12] residence time (secondary reaction), 13,14 and presence of other reactants such as water, [15][16][17][18] etc. Because of the chemical composition of the oil produced, moderate to significant upgrading (nitrogen removal and/or hydrogen addition) may be required to convert the oil into a refinery feedstock.…”

Section: Introductionmentioning

confidence: 99%

Detailed kinetic analysis of oil shale pyrolysis TGA data

Tiwari

Deo

2011

AIChE Journal

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There are significant resources of oil shale in the western United States, which if exploited in an environmentally responsible manner would provide secure access to transportation fuels. Understanding the kinetics of kerogen decomposition to oil is critical to designing a viable process. A dataset of thermogravimetric analysis (TGA) of the Green River oil shale is provided and two distinct data analysis approachesadvanced isoconversional method and parameter fitting are used to analyze the data. Activation energy distributions with conversion calculated using the isoconversional method (along with uncertainties) ranged between 93 and 245 kJ/mol. Root mean square errors between the model and experimental data were the lowest for the isoconversional method, but the distributed reactivity models also produced reasonable results. When using parameter fitting approaches, a number of models produce similar results making model choice difficult. Advanced isoconversional method is better in this regard, but maybe applicable to a limited number of reaction pathways. V

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“…When they are heated, they start to degrade into smaller chain lengths. The degradation of petroleum based material is assumed as first order reactions [8].The chain length can be decreased by high temperature treatment and solids having metal ions that act as catalysts. Paraffins in oxidizing media at high temperature undergo simultaneous pyrolysis and oxidation reactions.…”

mentioning

confidence: 99%

The effect of zinc stearate on thermal degradation of paraffin wax

Gönen

Balköse

İnal

et al. 2008

J Therm Anal Calorim

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Petroleum waxes are complex mixtures of high molecular mass saturated hydrocarbons. These hydrocarbon mixtures mainly consist of n-, iso-, and cyclo-alkanes and traces of aromatic and hetero-analogous compounds in the range of C16-C65 [1,2]. They are mainly divided into two groups, macrocrystalline and microcrystalline waxes, according to their structural constituents. In refining industry, waxes are obtained as a by-product in lubricating oil manufacturing process. As paraffin waxes have excellent properties, such as water-repellency and lubricity they find a wide range of applications including paper and chipboard production, packaging materials, cosmetic and pharmaceutical industries, and plastic industries [2]. Apart from these, they are also used as a component of binder system in ceramic processing, metal powder molding and metal injection molding [3,4]. A technical grade paraffin wax was used as phase change material in deposition of solar energy due to its high latent heat of melting (i.e., 190 kJ kg -1 ) [5]. In most of its applications, thermal decomposition takes place during processing or sintering, such as ceramic or metal powder molding. Another use of paraffin wax is solid fuel for rocket systems. Recently, it has been studied as a high regression rate propellant. It is a candidate for rocket solid fuel, which is expected to replace the conventional rocket fuels, such as cryogenic combustible gases; polymethyl methacrylate (PMMA), high density polyethylene (HDPE), due to its low cost, reduced complexity and increased performance. It has been pointed out that paraffin wax regression rate is about 0.100 cm -1 , which is five times greater than the other solid hybrid fuels [6]. The thermal decomposition kinetics of RP-1 rocket propellant, which consists of paraffins, olefins and aromatics, was investigated between 375-500°C. Thermal decomposition kinetics of RP-1 was assumed to occur by first order reaction [7].Paraffin molecules having different chain length behave similarly towards most of the reactants under similar reaction conditions. When they are heated, they start to degrade into smaller chain lengths. The degradation of petroleum based material is assumed as first order reactions [8].The chain length can be decreased by high temperature treatment and solids having metal ions that act as catalysts. Paraffins in oxidizing media at high temperature undergo simultaneous pyrolysis and oxidation reactions. Pyrolysis of n-hexadecane, considered as paraffinic substance, was studied by Watanabe et al. at 500-550°C in a batch type closed reactor [9]. There were five elementary reaction groups in the pyrolysis of n-hexadecane; initiation, isomerization, b-scission, H-abstraction and termination. In this mechanism, n-alkanes were produced from H-abstraction and l-alkenes are formed via b-scission [9]. Polyethylene which is a polymeric paraffin was converted to liquid and wax products using zeolite with concentrations up to maximum mass by 50% [10]. Organometallic compounds are added to fuels in small qu...

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Kinetics of the thermal decomposition of oil shale from Puertollano (Spain)

Cited by 122 publications

References 14 publications

Study of the Kinetics and Mechanisms of Thermal Decomposition of Moroccan Tarfaya Oil Shale and Its Kerogen

Study of the Kinetics and Mechanisms of Thermal Decomposition of Moroccan Tarfaya Oil Shale and Its Kerogen

Detailed kinetic analysis of oil shale pyrolysis TGA data

The effect of zinc stearate on thermal degradation of paraffin wax

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