Type I kerogen-rich oil shale from the Democratic Republic of the Congo: mineralogical description and pyrolysis kinetics

Abstract The Democratic Republic of the Congo holds important reserves of oil shale which is still under geological status. Herein, the characterization and pyrolysis kinetics of type I kerogen-rich oil shale of the western Central Kongo (CK) were investigated. X-ray diffraction, Fourier-transform i...

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Autores principales:	Rajaa Bouamoud, Ely Cheikh Moine, Raphaèl Mulongo-Masamba, Adnane El Hamidi, Mohammed Halim, Said Arsalane
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2019
Materias:	Type I kerogen Pyrolysis kinetics Isoconversional methods Mineralogy Central Kongo oil shale Science Q Petrology QE420-499
Acceso en línea:	https://doaj.org/article/18be3754168f4061a2070cea3ba5521f
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spelling	oai:doaj.org-article:18be3754168f4061a2070cea3ba5521f2021-12-02T13:37:32ZType I kerogen-rich oil shale from the Democratic Republic of the Congo: mineralogical description and pyrolysis kinetics10.1007/s12182-019-00384-21672-51071995-8226https://doaj.org/article/18be3754168f4061a2070cea3ba5521f2019-11-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-019-00384-2https://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract The Democratic Republic of the Congo holds important reserves of oil shale which is still under geological status. Herein, the characterization and pyrolysis kinetics of type I kerogen-rich oil shale of the western Central Kongo (CK) were investigated. X-ray diffraction, Fourier-transform infrared spectroscopy and thermal analysis (TG/DTA) showed that CK oil shale exhibits a siliceous mineral matrix with a consistent organic matter rich in aliphatic chains. The pyrolysis behavior of kerogen revealed the presence of a single mass loss between 300 and 550 °C, estimated at 12.5% and attributed to the oil production stage. Non-isothermal kinetics was performed by determining the activation energy using the iterative isoconversional model-free methods and exhibits a constant value with E = 211.5 ± 4.7 kJ mol−1. The most probable kinetic model describing the kerogen pyrolysis mechanism was obtained using the Coats–Redfern and Arrhenius plot methods. The results showed a unique kinetic triplet confirming the nature of kerogen, predominantly type I and reinforcing the previously reported geochemical characteristics of the CK oil shale. Besides, the calculation of thermodynamic parameters (ΔH, ΔS and ΔG*) corresponding to the pyrolysis of type I kerogen revealed that the process is non-spontaneous, in agreement with DTA experiments.Rajaa BouamoudEly Cheikh MoineRaphaèl Mulongo-MasambaAdnane El HamidiMohammed HalimSaid ArsalaneKeAi Communications Co., Ltd.articleType I kerogenPyrolysis kineticsIsoconversional methodsMineralogyCentral Kongo oil shaleScienceQPetrologyQE420-499ENPetroleum Science, Vol 17, Iss 1, Pp 255-267 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Type I kerogen Pyrolysis kinetics Isoconversional methods Mineralogy Central Kongo oil shale Science Q Petrology QE420-499
spellingShingle	Type I kerogen Pyrolysis kinetics Isoconversional methods Mineralogy Central Kongo oil shale Science Q Petrology QE420-499 Rajaa Bouamoud Ely Cheikh Moine Raphaèl Mulongo-Masamba Adnane El Hamidi Mohammed Halim Said Arsalane Type I kerogen-rich oil shale from the Democratic Republic of the Congo: mineralogical description and pyrolysis kinetics
description	Abstract The Democratic Republic of the Congo holds important reserves of oil shale which is still under geological status. Herein, the characterization and pyrolysis kinetics of type I kerogen-rich oil shale of the western Central Kongo (CK) were investigated. X-ray diffraction, Fourier-transform infrared spectroscopy and thermal analysis (TG/DTA) showed that CK oil shale exhibits a siliceous mineral matrix with a consistent organic matter rich in aliphatic chains. The pyrolysis behavior of kerogen revealed the presence of a single mass loss between 300 and 550 °C, estimated at 12.5% and attributed to the oil production stage. Non-isothermal kinetics was performed by determining the activation energy using the iterative isoconversional model-free methods and exhibits a constant value with E = 211.5 ± 4.7 kJ mol−1. The most probable kinetic model describing the kerogen pyrolysis mechanism was obtained using the Coats–Redfern and Arrhenius plot methods. The results showed a unique kinetic triplet confirming the nature of kerogen, predominantly type I and reinforcing the previously reported geochemical characteristics of the CK oil shale. Besides, the calculation of thermodynamic parameters (ΔH, ΔS and ΔG*) corresponding to the pyrolysis of type I kerogen revealed that the process is non-spontaneous, in agreement with DTA experiments.
format	article
author	Rajaa Bouamoud Ely Cheikh Moine Raphaèl Mulongo-Masamba Adnane El Hamidi Mohammed Halim Said Arsalane
author_facet	Rajaa Bouamoud Ely Cheikh Moine Raphaèl Mulongo-Masamba Adnane El Hamidi Mohammed Halim Said Arsalane
author_sort	Rajaa Bouamoud
title	Type I kerogen-rich oil shale from the Democratic Republic of the Congo: mineralogical description and pyrolysis kinetics
title_short	Type I kerogen-rich oil shale from the Democratic Republic of the Congo: mineralogical description and pyrolysis kinetics
title_full	Type I kerogen-rich oil shale from the Democratic Republic of the Congo: mineralogical description and pyrolysis kinetics
title_fullStr	Type I kerogen-rich oil shale from the Democratic Republic of the Congo: mineralogical description and pyrolysis kinetics
title_full_unstemmed	Type I kerogen-rich oil shale from the Democratic Republic of the Congo: mineralogical description and pyrolysis kinetics
title_sort	type i kerogen-rich oil shale from the democratic republic of the congo: mineralogical description and pyrolysis kinetics
publisher	KeAi Communications Co., Ltd.
publishDate	2019
url	https://doaj.org/article/18be3754168f4061a2070cea3ba5521f
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Type I kerogen-rich oil shale from the Democratic Republic of the Congo: mineralogical description and pyrolysis kinetics

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