Kinetics and thermodynamics evaluation of carbon dioxide enhanced oil shale pyrolysis

Abstract The pyrolysis process of oil shale is significantly affected by atmospheric conditions. In this paper, the pyrolysis experiments of oil shale under non-isothermal conditions are carried out using nitrogen and carbon dioxide as heat-carrying fluids. The results show that the activation energ...

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Autores principales:	Shuai Zhao, Youhong Sun, Xiaoshu Lü, Qiang Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/306df5aea95f40079b72e2d68974c970
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spelling	oai:doaj.org-article:306df5aea95f40079b72e2d68974c9702021-12-02T14:12:46ZKinetics and thermodynamics evaluation of carbon dioxide enhanced oil shale pyrolysis10.1038/s41598-020-80205-42045-2322https://doaj.org/article/306df5aea95f40079b72e2d68974c9702021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80205-4https://doaj.org/toc/2045-2322Abstract The pyrolysis process of oil shale is significantly affected by atmospheric conditions. In this paper, the pyrolysis experiments of oil shale under non-isothermal conditions are carried out using nitrogen and carbon dioxide as heat-carrying fluids. The results show that the activation energy of the second stage of oil shale pyrolysis under carbon dioxide is less than that under nitrogen. The thermodynamic analysis of the second stage of oil shale pyrolysis shows that Gibbs free energy, activation enthalpy and activation entropy are higher under carbon dioxide than those under nitrogen, which obeys the law of carbon dioxide promoting oil shale pyrolysis. In addition, the volatile release characteristics of oil shale in the second stage of pyrolysis were analyzed, which proves that the volatile release characteristics of oil shale under carbon dioxide are higher than that under nitrogen. Therefore, carbon dioxide is helpful to promote the pyrolysis of oil shale and increases the release of volatile substances during pyrolysis.Shuai ZhaoYouhong SunXiaoshu LüQiang LiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shuai Zhao Youhong Sun Xiaoshu Lü Qiang Li Kinetics and thermodynamics evaluation of carbon dioxide enhanced oil shale pyrolysis
description	Abstract The pyrolysis process of oil shale is significantly affected by atmospheric conditions. In this paper, the pyrolysis experiments of oil shale under non-isothermal conditions are carried out using nitrogen and carbon dioxide as heat-carrying fluids. The results show that the activation energy of the second stage of oil shale pyrolysis under carbon dioxide is less than that under nitrogen. The thermodynamic analysis of the second stage of oil shale pyrolysis shows that Gibbs free energy, activation enthalpy and activation entropy are higher under carbon dioxide than those under nitrogen, which obeys the law of carbon dioxide promoting oil shale pyrolysis. In addition, the volatile release characteristics of oil shale in the second stage of pyrolysis were analyzed, which proves that the volatile release characteristics of oil shale under carbon dioxide are higher than that under nitrogen. Therefore, carbon dioxide is helpful to promote the pyrolysis of oil shale and increases the release of volatile substances during pyrolysis.
format	article
author	Shuai Zhao Youhong Sun Xiaoshu Lü Qiang Li
author_facet	Shuai Zhao Youhong Sun Xiaoshu Lü Qiang Li
author_sort	Shuai Zhao
title	Kinetics and thermodynamics evaluation of carbon dioxide enhanced oil shale pyrolysis
title_short	Kinetics and thermodynamics evaluation of carbon dioxide enhanced oil shale pyrolysis
title_full	Kinetics and thermodynamics evaluation of carbon dioxide enhanced oil shale pyrolysis
title_fullStr	Kinetics and thermodynamics evaluation of carbon dioxide enhanced oil shale pyrolysis
title_full_unstemmed	Kinetics and thermodynamics evaluation of carbon dioxide enhanced oil shale pyrolysis
title_sort	kinetics and thermodynamics evaluation of carbon dioxide enhanced oil shale pyrolysis
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/306df5aea95f40079b72e2d68974c970
work_keys_str_mv	AT shuaizhao kineticsandthermodynamicsevaluationofcarbondioxideenhancedoilshalepyrolysis AT youhongsun kineticsandthermodynamicsevaluationofcarbondioxideenhancedoilshalepyrolysis AT xiaoshulu kineticsandthermodynamicsevaluationofcarbondioxideenhancedoilshalepyrolysis AT qiangli kineticsandthermodynamicsevaluationofcarbondioxideenhancedoilshalepyrolysis
_version_	1718391777248935936

Kinetics and thermodynamics evaluation of carbon dioxide enhanced oil shale pyrolysis

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