Low-temperature co-current oxidizing pyrolysis of oil shale: Study on the physicochemical properties, reactivity and exothermic characters of semi-coke as heat generation donor
Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characte...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Yang, Qinchuan [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022transfer abstract |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Iterated Gilbert mosaics - Baccelli, Francois ELSEVIER, 2019, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:216 ; year:2022 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.petrol.2022.110726 |
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ELV05860328X |
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| 245 | 1 | 0 | |a Low-temperature co-current oxidizing pyrolysis of oil shale: Study on the physicochemical properties, reactivity and exothermic characters of semi-coke as heat generation donor |
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| 520 | |a Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. | ||
| 520 | |a Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. | ||
| 650 | 7 | |a Heat generation donor |2 Elsevier | |
| 650 | 7 | |a Low-temperature co-current oxidizing |2 Elsevier | |
| 650 | 7 | |a Reactivity |2 Elsevier | |
| 650 | 7 | |a Exothermic characters |2 Elsevier | |
| 650 | 7 | |a Oil shale |2 Elsevier | |
| 650 | 7 | |a Physicochemical properties |2 Elsevier | |
| 700 | 1 | |a Zhang, Xu |4 oth | |
| 700 | 1 | |a Xu, Shaotao |4 oth | |
| 700 | 1 | |a Wang, Zhendong |4 oth | |
| 700 | 1 | |a Guo, Wei |4 oth | |
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10.1016/j.petrol.2022.110726 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001868.pica (DE-627)ELV05860328X (ELSEVIER)S0920-4105(22)00589-7 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Yang, Qinchuan verfasserin aut Low-temperature co-current oxidizing pyrolysis of oil shale: Study on the physicochemical properties, reactivity and exothermic characters of semi-coke as heat generation donor 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. Heat generation donor Elsevier Low-temperature co-current oxidizing Elsevier Reactivity Elsevier Exothermic characters Elsevier Oil shale Elsevier Physicochemical properties Elsevier Zhang, Xu oth Xu, Shaotao oth Wang, Zhendong oth Guo, Wei oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:216 year:2022 pages:0 https://doi.org/10.1016/j.petrol.2022.110726 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 216 2022 0 |
| spelling |
10.1016/j.petrol.2022.110726 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001868.pica (DE-627)ELV05860328X (ELSEVIER)S0920-4105(22)00589-7 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Yang, Qinchuan verfasserin aut Low-temperature co-current oxidizing pyrolysis of oil shale: Study on the physicochemical properties, reactivity and exothermic characters of semi-coke as heat generation donor 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. Heat generation donor Elsevier Low-temperature co-current oxidizing Elsevier Reactivity Elsevier Exothermic characters Elsevier Oil shale Elsevier Physicochemical properties Elsevier Zhang, Xu oth Xu, Shaotao oth Wang, Zhendong oth Guo, Wei oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:216 year:2022 pages:0 https://doi.org/10.1016/j.petrol.2022.110726 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 216 2022 0 |
| allfields_unstemmed |
10.1016/j.petrol.2022.110726 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001868.pica (DE-627)ELV05860328X (ELSEVIER)S0920-4105(22)00589-7 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Yang, Qinchuan verfasserin aut Low-temperature co-current oxidizing pyrolysis of oil shale: Study on the physicochemical properties, reactivity and exothermic characters of semi-coke as heat generation donor 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. Heat generation donor Elsevier Low-temperature co-current oxidizing Elsevier Reactivity Elsevier Exothermic characters Elsevier Oil shale Elsevier Physicochemical properties Elsevier Zhang, Xu oth Xu, Shaotao oth Wang, Zhendong oth Guo, Wei oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:216 year:2022 pages:0 https://doi.org/10.1016/j.petrol.2022.110726 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 216 2022 0 |
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10.1016/j.petrol.2022.110726 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001868.pica (DE-627)ELV05860328X (ELSEVIER)S0920-4105(22)00589-7 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Yang, Qinchuan verfasserin aut Low-temperature co-current oxidizing pyrolysis of oil shale: Study on the physicochemical properties, reactivity and exothermic characters of semi-coke as heat generation donor 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. Heat generation donor Elsevier Low-temperature co-current oxidizing Elsevier Reactivity Elsevier Exothermic characters Elsevier Oil shale Elsevier Physicochemical properties Elsevier Zhang, Xu oth Xu, Shaotao oth Wang, Zhendong oth Guo, Wei oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:216 year:2022 pages:0 https://doi.org/10.1016/j.petrol.2022.110726 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 216 2022 0 |
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10.1016/j.petrol.2022.110726 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001868.pica (DE-627)ELV05860328X (ELSEVIER)S0920-4105(22)00589-7 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Yang, Qinchuan verfasserin aut Low-temperature co-current oxidizing pyrolysis of oil shale: Study on the physicochemical properties, reactivity and exothermic characters of semi-coke as heat generation donor 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. Heat generation donor Elsevier Low-temperature co-current oxidizing Elsevier Reactivity Elsevier Exothermic characters Elsevier Oil shale Elsevier Physicochemical properties Elsevier Zhang, Xu oth Xu, Shaotao oth Wang, Zhendong oth Guo, Wei oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:216 year:2022 pages:0 https://doi.org/10.1016/j.petrol.2022.110726 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 216 2022 0 |
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Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. 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Low-temperature co-current oxidizing pyrolysis of oil shale: Study on the physicochemical properties, reactivity and exothermic characters of semi-coke as heat generation donor |
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Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. |
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Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. |
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Low-temperature co-current oxidizing pyrolysis is a new oil shale conversion process with low-energy-input and high shale oil recovery. However, due to the extreme complexity of oil shale decomposition, this method is far from being fully understood. In this study, we focus on the evolution characteristics of physicochemical properties and reactivity of semi-coke as heat generation donor, especially trying to further verify the feasibility of the conversion method through the investigation of its exothermic ability. The results show that as the increase of retorting temperature, the increase in pore numbers and the enhancement of pore connectivity make the oil shale with “dense and low permeability” transform to “porous and high permeability”, which will effectively enhance the heat transfer and the migration of pyrolytic products. And the thermal analysis experiments indicates that the reactivity and exothermic characteristics of semi-coke have been significantly weakened with the increase of retorting temperature. Meanwhile, the decline of heat and mass transfer performance caused by the increase of heating rates and sample masses have an obvious negative effect on the reactivity and combustibility of semi-coke. The combustion kinetic study reveals the apparent activation energy of semi-coke gradually increases and the reactivity decreases with the increase of retorting temperature. Though the heat loss caused by retorting is as high as 67.2% (SC500), the heat in semi-coke is still 2.89 times of that required for complete thermal decomposition of oil shale, which provides necessary data support for the further application of this conversion method. |
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