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

Aboulkas, A.; Harfi, K. El

doi:10.3176/oil.2008.4.04

Cited by 128 publications

(83 citation statements)

References 30 publications

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“…It is found that the shapes of the TG/DTG curves are shifted laterally with increasing heating rate. The onset temperature, peak temperature, and the rate of mass loss also shifted laterally due to the variation in the heating rates and short exposure time to a particular temperature at higher heating rates, which affects the kinetics of decomposition of the samples [27,42]. It is also observed that the TG/DTA exothermic peak shifted laterally towards the higher temperatures with the increase in heating rate where the maximum mass loss occurs (Fig.…”

Section: Reactivity Test Of the Carbonized Acfsmentioning

confidence: 66%

“…Several researchers have applied the model-free method on the thermogravimetric (TG) data to evaluate the kinetic parameter of coal, biomass, and coal-biomass blends [4,7,8,11,12]. Aboulkas et al [27] and Budrugeac [3] have also applied the model-free method on the TG data to evaluate to evaluate the kinetic parameter of Tarfaya oil shale, its included kerogen samples, and a composite epoxy resin material, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Thermal behaviour of low-rank Indian coal fines agglomerated with an organic binder

Das

Baruah

Saikia

2016

J Therm Anal Calorim

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The combustion kinetic parameters of the carbonized agglomerated coal fines (ACFs) were determined by thermogravimetric analysis under oxy-non-isothermal conditions for planning, designing, and operating the related combustion systems at an industrial scale. Friedman and Flynn-Wall-Ozawa methods were applied to determine the activation energies (E) and pre-exponential factors (A) of the thermal decomposition of ACFs. The multivariate nonlinear regression analyses were performed to find out the formal mechanisms, kinetic model, and the corresponding kinetic triplets. The results revealed the n-dim. Avrami-Erofeev (An) and nth-order (Fn) mechanism responsible for the decomposition of the carbonized ACFs. The activation energy of the combustion of carbonized ACFs is found to be in the range of 132.75-191.57 kJ mol -1 .

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Section: Reactivity Test Of the Carbonized Acfsmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Thermal behaviour of low-rank Indian coal fines agglomerated with an organic binder

Das

Baruah

Saikia

2016

J Therm Anal Calorim

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“…Oil shale is a fine-grained sedimentary rock containing large quantities of organic matter capable of yielding oil upon retorting, with an oil content of 3.5-30%. When heated above 500 • C in an oxygen-poor environment, it can yield shale oil, which has a significant role in mitigating the pressure of oil crisis as an alternative to oil energy in some industrial production [3]. Oil shale is commonly associated with coal, and both coal and oil shale can be slowly oxidized in goafs resulting in a temperature increase and flammable gases release.…”

Section: Introductionmentioning

confidence: 99%

Study on the Low-Temperature Oxidation Law in the Co-Mining Face of Coal and Oil Shale in a Goaf—A Case Study in the Liangjia Coal Mine, China

Wang

Sun

et al. 2018

Energies

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Abstract:The low-temperature oxidation law of coal and rock mass is the basis to study spontaneous combustion in goafs. In this paper, the low-temperature oxidation laws of coal, oil shale, and mixtures of coal and oil shale were studied by using laboratory programmed heating experiments combined with a field beam tube monitoring system. The results from the programmed heating experiments showed that the heat released from oil shale was less than that from coal. Coal had a lower carbon monoxide (CO)-producing temperature than oil shale, and the mixture showed obvious inhibiting effects on CO production with an average CO concentration of about 38% of that for coal. Index gases were selected in different stages to determine the critical turning point temperature for each stage. The field beam tube monitoring system showed that the temperature field of the 1105 co-mining face of coal and oil shale in the goaf of the Liangjia Coal Mine presented a ladder-like distribution, and CO concentration was the highest for coal and lower for the mixture of coal and oil shale, indicating that the mixture of coal with oil shale had an inhibiting effect on CO production, consistent with the results from the programmed heating experiments.

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“…Oil shale pyrolysis using thermogravimetric 20 analysis has been previously investigated 9,49,50 . It was found that, depending on the oil shale 21 type, its decomposition exhibits either single or a two-stage evolution of hydrocarbon material, in 22 the temperature range of 250 -620ºC.…”

mentioning

confidence: 99%

“…This is a carbonaceous material from which oil and combustible gas can be 15 extracted by destructive distillation 6 . Several studies have been carried out concerning the 16 characterization of different oil shale types and their potential for liquid hydrocarbon generation 17 [7][8][9] . The most important techniques used for characterization of potential source rocks are Eval pyrolysis 10 , vitrinite reflectance measurements, X-Ray diffraction, FTIR and thermal 19 analysis (DTA-TGA).…”

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confidence: 99%

The Oil Shale Transformation in the Presence of an Acidic BEA Zeolite under Microwave Irradiation

et al. 2014

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The transformation of an oil shale sample from the Autun Basin in the Massif Central, France, was studied using two different heating strategies: microwave irradiation and conventional heating. Microwave heating was performed using a single-mode cavity operating at a frequency of 2.45 GHz under an inert atmosphere. Heating of the sample generated liquid products of similar composition using either microwave or conventional heating. The yields of liquid products were similar in the two cases, while the overall energy requirements were much lower using microwave irradiation. The influence of water vapor on the oil shale decomposition was also studied under microwave energy. In order to simulate conversion of the organic fraction of the oil shale in the presence of an acidic zeolite catalyst, the oil shale sample was mixed with 5 wt % BEA zeolite and heated under microwave irradiation. It was found that the liquid products yield decreased along with an increase in the amount of coke produced. Gaseous and liquid products recovered showed a tendency for the production of lighter components in the presence of zeolite. The aromatic character of the oils was more important when microwaves were used, especially in the presence of zeolite.

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

Abstract: In this research, thermal characteristics and kinetic parameters of Tarfaya oil shale and its kerogen samples were determined by thermogravimetry (TG/DTG) under non-isothermal heating conditions. The pyrolysis experiments

Cited by 128 publications

References 30 publications

Thermal behaviour of low-rank Indian coal fines agglomerated with an organic binder

Thermal behaviour of low-rank Indian coal fines agglomerated with an organic binder

Study on the Low-Temperature Oxidation Law in the Co-Mining Face of Coal and Oil Shale in a Goaf—A Case Study in the Liangjia Coal Mine, China

The Oil Shale Transformation in the Presence of an Acidic BEA Zeolite under Microwave Irradiation

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