Thermal oxidation study of Moroccan oil shale: A new approach to non-isothermal kinetics based on deconvolution procedure

Moine, Ely Cheikh; Tangarfa, Mariam; Khachani, Mariam; Hamidi, Adnane El; Halim, Mohammed; Arsalane, Saı̈d

doi:10.1016/j.fuel.2016.04.076

“…KAS method is the abbreviation of Kissinger-Akahira-Sunose, and its calculation method is as follows [9] . A-preexponential factor, s -1 ; E a -activation energy, kJ·mol -1 .…”

Section: Kas Methods For Solving Activation Energy E Amentioning

confidence: 99%

Thermodynamic Mechanism Evaluate the Feasibility of Oil Shale Pyrolysis by Topochemical Heat

Zhao

¹

,

Lü

²

,

Sun

³

et al. 2020

Preprint

0

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Topochemical heat in-situ pyrolysis of oil shale is achieved by injecting high temperature nitrogen to promote oil shale pyrolysis and release heat, and then injecting air to trigger oil shale combustion in the early stage of oil shale pyrolysis, and then by injecting normal temperature air continuously to promote local oxidation of oil shale in the later stage. In order to verify the oil and gas recovery by topochemical heat method, Jilin University has chosen Fuyu City, Jilin Province, to carry out pilot project of oil shale in-situ pyrolysis by topochemical heat method. Besides, in order to infer the spontaneity, feasibility and difficulty of continuous pyrolysis of oil shale based on topochemical heat, this paper, the mechanism of solid-state pyrolysis and the thermodynamic analysis of transition state of oil shale in Fuyu area are discussed. Because the second stage of oil shale pyrolysis is the main stage of oil production. Therefore, the characteristics of Gibbs free energy, free enthalpy and free entropy of transition state in the main oil production stage of oil shale pyrolysis are obtained by calculation. The results show that in situ pyrolysis of oil shale topochemical heat can be carried out spontaneously and continuously, and the release characteristics of volatiles during pyrolysis of oil shale are described.

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“…Figure 4 shows the mass loss of shales in the function of temperature. On the other hand, the second loss differs according to the nature of the shale, it is observed between 200 ° C and 560 ° C for the oil shale of Bab-Taza and Tetouan, while that characteristic of the shale of the Arba Ayacha is located between 200 ° C and 460 ° C, which corresponds to the degradation of the organic matter, accompanied by a dehydroxylation of the metal hydroxyls [22].…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

“…The thermograms obtained indicate the same major mass losses except the thermal behavior of the Arba Ayacha oil shale, the thermogram of which looks different from that of other oil shales (Tetouan and Bab Taza). Indeed, the first loss between 25 ° C and 200 ° C is attributed to the dehydration of powders for all thermograms [21].On the other hand, the second loss differs according to the nature of the shale, it is observed between 200 ° C and 560 ° C for the oil shale of Bab-Taza and Tetouan, while that characteristic of the shale of the Arba Ayacha is located between 200 ° C and 460 ° C, which corresponds to the degradation of the organic matter, accompanied by a dehydroxylation of the metal hydroxyls[22].The last loss can be attributed to the structural transformation of some minerals as confirmed by XRD[23]. In this last step, the weight loss relative to the different schists studied follows the following order: SBAA (12%)> SBTE (3%) = SBBT (3%).Note also that in the case of Arba Ayacha Shale, we can divide the last loss into two areas, between 460-650 ° C and 650-900 ° C; this may be related to the nature of the mineral species and the combustible resistivity of the organic molecules present in these geomaterials[23].…”

mentioning

confidence: 99%

Oil Shale of Rif region: natural adsorbents for environmental cleaning

Hammari

¹

,

Gouza

²

,

Boukra

³

et al. 2022

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Oils shales are the largest energy resource in the world and are widely used in the development of industrial fuel and petroleum activities. Oil shale is one of the important mineral resources in Morocco and it has a large reserve, the most important of which is of Timahdit, Tarfaya, and Tangier. Nowadays, the increasing concentration of toxic organic species (Antibiotics, Colorants) in soils and domestic, agricultural, and industrial wastewater has become a major environmental concern. for this reason, we have focused on the interactions of raw oil shale deposits with toxic organic species as part of an additional valuation of national energy resources. Our work is focused on the contribution of organic matter on antibiotic retention, as well as the role of hydrophobic interactions on the molecules-mineral surfaces. The results of the characterizations show the possible contribution of raw oil shales in the accumulation of organic pollutants in soil and water. Thermally treated oil shell powders can be good mineral sorbents for environmental cleaning.

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“…KAS method is the abbreviation of Kissinger–Akahira–Sunose, and its calculation method is as follows 9 . where, α-Conversion rate of oil shale pyrolysis in the second stage, %; m 0 —Initial mass of oil shale at the second pyrolysis stage, mg; m—sample mass at T K, mg; m ∞ —Final mass of oil shale at the second pyrolysis stage, mg; β—Heating rate, K·min −1 ; T—reaction temperature, K; R—gas constant, 8.314 J·mol −1 ; G(α)—Integral form of the most probable mechanism function; A—preexponential factor, s −1 ; E a —activation energy, kJ·mol −1 .…”

Section: Materials and Principlementioning

confidence: 99%

“…KAS method for solving activation energy E a . KAS method is the abbreviation of Kissinger-Akahira-Sunose, and its calculation method is as follows 9 .…”

Section: Kinetic Parameters Calculationsmentioning

confidence: 99%

Thermodynamic mechanism evaluate the feasibility of oil shale pyrolysis by topochemical heat

Zhao

¹

,

Lü

²

,

Sun

³

et al. 2021

Sci Rep

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Topochemical heat in-situ pyrolysis of oil shale is achieved by injecting high temperature nitrogen to promote oil shale pyrolysis and release heat, and then injecting air to trigger oil shale combustion in the early stage of oil shale pyrolysis, and then by injecting normal temperature air continuously to promote local oxidation of oil shale in the later stage. In order to verify the oil and gas recovery by topochemical heat method, Jilin University has chosen Fuyu City, Jilin Province, to carry out pilot project of oil shale in-situ pyrolysis by topochemical heat method. Besides, in order to infer the spontaneity, feasibility and difficulty of continuous pyrolysis of oil shale based on topochemical heat, this paper, the mechanism of solid-state pyrolysis and the thermodynamic analysis of transition state of oil shale in Fuyu area are discussed. Because the second stage of oil shale pyrolysis is the main stage of oil production. Therefore, the characteristics of Gibbs free energy, free enthalpy and free entropy of transition state in the main oil production stage of oil shale pyrolysis are obtained by calculation. The results show that in situ pyrolysis of oil shale topochemical heat can be carried out spontaneously and continuously, and the release characteristics of volatiles during pyrolysis of oil shale are described.

show abstract

Thermal oxidation study of Moroccan oil shale: A new approach to non-isothermal kinetics based on deconvolution procedure

Cited by 32 publications

References 49 publications

Thermodynamic Mechanism Evaluate the Feasibility of Oil Shale Pyrolysis by Topochemical Heat

Thermodynamic Mechanism Evaluate the Feasibility of Oil Shale Pyrolysis by Topochemical Heat

Oil Shale of Rif region: natural adsorbents for environmental cleaning

Thermodynamic mechanism evaluate the feasibility of oil shale pyrolysis by topochemical heat

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