Insight into the intrinsic reaction of brown coal oxidation at low temperature: Differential scanning calorimetry study
The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differen...
Ausführliche Beschreibung
Autor*in: |
Li, Zhengfeng [verfasserIn] |
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E-Artikel |
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Sprache: |
Englisch |
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2016transfer abstract |
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Umfang: |
7 |
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Übergeordnetes Werk: |
Enthalten in: Generating magnetic response and half-metallicity in GaP via dilute Ti-doping for spintronic applications - Saini, Hardev S. ELSEVIER, 2015transfer abstract, New York, NY [u.a.] |
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Übergeordnetes Werk: |
volume:147 ; year:2016 ; day:15 ; month:06 ; pages:64-70 ; extent:7 |
Links: |
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DOI / URN: |
10.1016/j.fuproc.2015.07.030 |
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Katalog-ID: |
ELV029790344 |
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520 | |a The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. | ||
520 | |a The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. | ||
700 | 1 | |a Zhang, Yulong |4 oth | |
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700 | 1 | |a Chang, Liping |4 oth | |
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10.1016/j.fuproc.2015.07.030 doi GBVA2016013000006.pica (DE-627)ELV029790344 (ELSEVIER)S0378-3820(15)30107-7 DE-627 ger DE-627 rakwb eng 660 660 DE-600 670 VZ 540 VZ 630 VZ Li, Zhengfeng verfasserin aut Insight into the intrinsic reaction of brown coal oxidation at low temperature: Differential scanning calorimetry study 2016transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. Zhang, Yulong oth Jing, Xiaoxia oth Zhang, Yanli oth Chang, Liping oth Enthalten in Science Direct Saini, Hardev S. ELSEVIER Generating magnetic response and half-metallicity in GaP via dilute Ti-doping for spintronic applications 2015transfer abstract New York, NY [u.a.] (DE-627)ELV01324101X volume:147 year:2016 day:15 month:06 pages:64-70 extent:7 https://doi.org/10.1016/j.fuproc.2015.07.030 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_24 GBV_ILN_40 AR 147 2016 15 0615 64-70 7 045F 660 |
spelling |
10.1016/j.fuproc.2015.07.030 doi GBVA2016013000006.pica (DE-627)ELV029790344 (ELSEVIER)S0378-3820(15)30107-7 DE-627 ger DE-627 rakwb eng 660 660 DE-600 670 VZ 540 VZ 630 VZ Li, Zhengfeng verfasserin aut Insight into the intrinsic reaction of brown coal oxidation at low temperature: Differential scanning calorimetry study 2016transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. Zhang, Yulong oth Jing, Xiaoxia oth Zhang, Yanli oth Chang, Liping oth Enthalten in Science Direct Saini, Hardev S. ELSEVIER Generating magnetic response and half-metallicity in GaP via dilute Ti-doping for spintronic applications 2015transfer abstract New York, NY [u.a.] (DE-627)ELV01324101X volume:147 year:2016 day:15 month:06 pages:64-70 extent:7 https://doi.org/10.1016/j.fuproc.2015.07.030 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_24 GBV_ILN_40 AR 147 2016 15 0615 64-70 7 045F 660 |
allfields_unstemmed |
10.1016/j.fuproc.2015.07.030 doi GBVA2016013000006.pica (DE-627)ELV029790344 (ELSEVIER)S0378-3820(15)30107-7 DE-627 ger DE-627 rakwb eng 660 660 DE-600 670 VZ 540 VZ 630 VZ Li, Zhengfeng verfasserin aut Insight into the intrinsic reaction of brown coal oxidation at low temperature: Differential scanning calorimetry study 2016transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. Zhang, Yulong oth Jing, Xiaoxia oth Zhang, Yanli oth Chang, Liping oth Enthalten in Science Direct Saini, Hardev S. ELSEVIER Generating magnetic response and half-metallicity in GaP via dilute Ti-doping for spintronic applications 2015transfer abstract New York, NY [u.a.] (DE-627)ELV01324101X volume:147 year:2016 day:15 month:06 pages:64-70 extent:7 https://doi.org/10.1016/j.fuproc.2015.07.030 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_24 GBV_ILN_40 AR 147 2016 15 0615 64-70 7 045F 660 |
allfieldsGer |
10.1016/j.fuproc.2015.07.030 doi GBVA2016013000006.pica (DE-627)ELV029790344 (ELSEVIER)S0378-3820(15)30107-7 DE-627 ger DE-627 rakwb eng 660 660 DE-600 670 VZ 540 VZ 630 VZ Li, Zhengfeng verfasserin aut Insight into the intrinsic reaction of brown coal oxidation at low temperature: Differential scanning calorimetry study 2016transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. Zhang, Yulong oth Jing, Xiaoxia oth Zhang, Yanli oth Chang, Liping oth Enthalten in Science Direct Saini, Hardev S. ELSEVIER Generating magnetic response and half-metallicity in GaP via dilute Ti-doping for spintronic applications 2015transfer abstract New York, NY [u.a.] (DE-627)ELV01324101X volume:147 year:2016 day:15 month:06 pages:64-70 extent:7 https://doi.org/10.1016/j.fuproc.2015.07.030 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_24 GBV_ILN_40 AR 147 2016 15 0615 64-70 7 045F 660 |
allfieldsSound |
10.1016/j.fuproc.2015.07.030 doi GBVA2016013000006.pica (DE-627)ELV029790344 (ELSEVIER)S0378-3820(15)30107-7 DE-627 ger DE-627 rakwb eng 660 660 DE-600 670 VZ 540 VZ 630 VZ Li, Zhengfeng verfasserin aut Insight into the intrinsic reaction of brown coal oxidation at low temperature: Differential scanning calorimetry study 2016transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. Zhang, Yulong oth Jing, Xiaoxia oth Zhang, Yanli oth Chang, Liping oth Enthalten in Science Direct Saini, Hardev S. ELSEVIER Generating magnetic response and half-metallicity in GaP via dilute Ti-doping for spintronic applications 2015transfer abstract New York, NY [u.a.] (DE-627)ELV01324101X volume:147 year:2016 day:15 month:06 pages:64-70 extent:7 https://doi.org/10.1016/j.fuproc.2015.07.030 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_24 GBV_ILN_40 AR 147 2016 15 0615 64-70 7 045F 660 |
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English |
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Enthalten in Generating magnetic response and half-metallicity in GaP via dilute Ti-doping for spintronic applications New York, NY [u.a.] volume:147 year:2016 day:15 month:06 pages:64-70 extent:7 |
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Enthalten in Generating magnetic response and half-metallicity in GaP via dilute Ti-doping for spintronic applications New York, NY [u.a.] volume:147 year:2016 day:15 month:06 pages:64-70 extent:7 |
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Generating magnetic response and half-metallicity in GaP via dilute Ti-doping for spintronic applications |
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But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. 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Generating magnetic response and half-metallicity in GaP via dilute Ti-doping for spintronic applications |
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insight into the intrinsic reaction of brown coal oxidation at low temperature: differential scanning calorimetry study |
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Insight into the intrinsic reaction of brown coal oxidation at low temperature: Differential scanning calorimetry study |
abstract |
The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. |
abstractGer |
The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. |
abstract_unstemmed |
The oxidation of coal at low-temperature involves a series of physical and chemical processes and many parallel reactions. But the intrinsic oxidation reaction between O2 and coal is the main source responsible for the self-heating and spontaneous combustion of brown coal. In this research, differential scanning calorimetry (DSC) was introduced to determine the intrinsic reaction of Ximeng brown coal oxidation at low temperature. The heat evolution of the intrinsic reaction after eliminating the evaporation of water and thermal decomposition of inner oxygen-containing functional groups was obtained by subtracting the DSC curve in N2 from the DSC curve in air. It is considered that the intrinsic reactions between coal and oxygen could be divided into three stages, including the slow oxidation, accelerated oxidation and rapid oxidation stages. Compared with DSC-air curve, the DSC-sub curve based on the subtracting results elucidated the exothermic characteristics of intrinsic oxidation reaction in each stage more clearly. In addition, DSC-sub curve reduced the experimental errors inborn from the heating rate and the sample mass, so it had more practical application value than DSC-air curves. Activation energies obtained from DSC-sub curves can better reflect intrinsic oxidation reaction and be used as important indicators for the evaluation of coal spontaneous combustion tendency. |
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Insight into the intrinsic reaction of brown coal oxidation at low temperature: Differential scanning calorimetry study |
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https://doi.org/10.1016/j.fuproc.2015.07.030 |
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