Characterization of hydrothermally dried low-rank coals
Abstract Over a period of eight years (1989 through 1997) the Mineral Industry Research Laboratory (MIRL) at the University of Alaska, Fairbanks, AK, has investigated the effects of temperature, residence time and particle size on the degree of low-rank coal (LRC) upgrading for a nonevaporative, hyd...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Walsh, D. E. [verfasserIn] |
|---|
| Format: |
E-Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
1999 |
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| Schlagwörter: |
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| Anmerkung: |
© The Society for Mining, Metallurgy & Exploration 1999 |
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| Übergeordnetes Werk: |
Enthalten in: Mining, metallurgy & exploration - [Cham] : Springer International Publishing, 2019, 16(1999), 1 vom: 01. Feb., Seite 48-56 |
|---|---|
| Übergeordnetes Werk: |
volume:16 ; year:1999 ; number:1 ; day:01 ; month:02 ; pages:48-56 |
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| DOI / URN: |
10.1007/BF03402856 |
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SPR038592932 |
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| 520 | |a Abstract Over a period of eight years (1989 through 1997) the Mineral Industry Research Laboratory (MIRL) at the University of Alaska, Fairbanks, AK, has investigated the effects of temperature, residence time and particle size on the degree of low-rank coal (LRC) upgrading for a nonevaporative, hydrothermal drying process, also known as hot water drying (HWD). The following three Alaskan LRC s were used in this study: Usibelli coal (Seam No. 4) from the Nenana Coal Field, Little Tonzona coal from near McGrath, and Beluga coal from the Beluga-Yentna field on the west side of Cook Inlet. Replicated factorial tests were conducted. Experimental results indicate that most of the low-rank coal upgrading via HWD occurs rapidly within the first 10 to 20 min of residence time. Thereafter, the upgrading process slows down, and more than 100 min of additional residence time is required to produce percentage increases equivalent to what was achieved in the first 10 to 20 min. The properties of the hot water dried products were very sensitive to process temperature. Calorific value, carbon and oxygen contents, equilibrium moisture levels and Hardgrove gindabilities all appear to change linearly with temperature within the 275 °C to 325°C (525°F to 615°F) range. | ||
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| 700 | 1 | |a Owens, H. |4 aut | |
| 700 | 1 | |a Mokka, J. R. |4 aut | |
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10.1007/BF03402856 doi (DE-627)SPR038592932 (SPR)BF03402856-e DE-627 ger DE-627 rakwb eng Walsh, D. E. verfasserin aut Characterization of hydrothermally dried low-rank coals 1999 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Society for Mining, Metallurgy & Exploration 1999 Abstract Over a period of eight years (1989 through 1997) the Mineral Industry Research Laboratory (MIRL) at the University of Alaska, Fairbanks, AK, has investigated the effects of temperature, residence time and particle size on the degree of low-rank coal (LRC) upgrading for a nonevaporative, hydrothermal drying process, also known as hot water drying (HWD). The following three Alaskan LRC s were used in this study: Usibelli coal (Seam No. 4) from the Nenana Coal Field, Little Tonzona coal from near McGrath, and Beluga coal from the Beluga-Yentna field on the west side of Cook Inlet. Replicated factorial tests were conducted. Experimental results indicate that most of the low-rank coal upgrading via HWD occurs rapidly within the first 10 to 20 min of residence time. Thereafter, the upgrading process slows down, and more than 100 min of additional residence time is required to produce percentage increases equivalent to what was achieved in the first 10 to 20 min. The properties of the hot water dried products were very sensitive to process temperature. Calorific value, carbon and oxygen contents, equilibrium moisture levels and Hardgrove gindabilities all appear to change linearly with temperature within the 275 °C to 325°C (525°F to 615°F) range. Coal processing (dpeaa)DE-He213 Hydrothermal drying (dpeaa)DE-He213 Coal characterization (dpeaa)DE-He213 Low-rank coals (dpeaa)DE-He213 Rao, P. D. aut Owens, H. aut Mokka, J. R. aut Noirot, O. aut Enthalten in Mining, metallurgy & exploration [Cham] : Springer International Publishing, 2019 16(1999), 1 vom: 01. Feb., Seite 48-56 (DE-627)1039800637 (DE-600)2947829-7 2524-3470 nnns volume:16 year:1999 number:1 day:01 month:02 pages:48-56 https://dx.doi.org/10.1007/BF03402856 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA AR 16 1999 1 01 02 48-56 |
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10.1007/BF03402856 doi (DE-627)SPR038592932 (SPR)BF03402856-e DE-627 ger DE-627 rakwb eng Walsh, D. E. verfasserin aut Characterization of hydrothermally dried low-rank coals 1999 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Society for Mining, Metallurgy & Exploration 1999 Abstract Over a period of eight years (1989 through 1997) the Mineral Industry Research Laboratory (MIRL) at the University of Alaska, Fairbanks, AK, has investigated the effects of temperature, residence time and particle size on the degree of low-rank coal (LRC) upgrading for a nonevaporative, hydrothermal drying process, also known as hot water drying (HWD). The following three Alaskan LRC s were used in this study: Usibelli coal (Seam No. 4) from the Nenana Coal Field, Little Tonzona coal from near McGrath, and Beluga coal from the Beluga-Yentna field on the west side of Cook Inlet. Replicated factorial tests were conducted. Experimental results indicate that most of the low-rank coal upgrading via HWD occurs rapidly within the first 10 to 20 min of residence time. Thereafter, the upgrading process slows down, and more than 100 min of additional residence time is required to produce percentage increases equivalent to what was achieved in the first 10 to 20 min. The properties of the hot water dried products were very sensitive to process temperature. Calorific value, carbon and oxygen contents, equilibrium moisture levels and Hardgrove gindabilities all appear to change linearly with temperature within the 275 °C to 325°C (525°F to 615°F) range. Coal processing (dpeaa)DE-He213 Hydrothermal drying (dpeaa)DE-He213 Coal characterization (dpeaa)DE-He213 Low-rank coals (dpeaa)DE-He213 Rao, P. D. aut Owens, H. aut Mokka, J. R. aut Noirot, O. aut Enthalten in Mining, metallurgy & exploration [Cham] : Springer International Publishing, 2019 16(1999), 1 vom: 01. Feb., Seite 48-56 (DE-627)1039800637 (DE-600)2947829-7 2524-3470 nnns volume:16 year:1999 number:1 day:01 month:02 pages:48-56 https://dx.doi.org/10.1007/BF03402856 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA AR 16 1999 1 01 02 48-56 |
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10.1007/BF03402856 doi (DE-627)SPR038592932 (SPR)BF03402856-e DE-627 ger DE-627 rakwb eng Walsh, D. E. verfasserin aut Characterization of hydrothermally dried low-rank coals 1999 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Society for Mining, Metallurgy & Exploration 1999 Abstract Over a period of eight years (1989 through 1997) the Mineral Industry Research Laboratory (MIRL) at the University of Alaska, Fairbanks, AK, has investigated the effects of temperature, residence time and particle size on the degree of low-rank coal (LRC) upgrading for a nonevaporative, hydrothermal drying process, also known as hot water drying (HWD). The following three Alaskan LRC s were used in this study: Usibelli coal (Seam No. 4) from the Nenana Coal Field, Little Tonzona coal from near McGrath, and Beluga coal from the Beluga-Yentna field on the west side of Cook Inlet. Replicated factorial tests were conducted. Experimental results indicate that most of the low-rank coal upgrading via HWD occurs rapidly within the first 10 to 20 min of residence time. Thereafter, the upgrading process slows down, and more than 100 min of additional residence time is required to produce percentage increases equivalent to what was achieved in the first 10 to 20 min. The properties of the hot water dried products were very sensitive to process temperature. Calorific value, carbon and oxygen contents, equilibrium moisture levels and Hardgrove gindabilities all appear to change linearly with temperature within the 275 °C to 325°C (525°F to 615°F) range. Coal processing (dpeaa)DE-He213 Hydrothermal drying (dpeaa)DE-He213 Coal characterization (dpeaa)DE-He213 Low-rank coals (dpeaa)DE-He213 Rao, P. D. aut Owens, H. aut Mokka, J. R. aut Noirot, O. aut Enthalten in Mining, metallurgy & exploration [Cham] : Springer International Publishing, 2019 16(1999), 1 vom: 01. Feb., Seite 48-56 (DE-627)1039800637 (DE-600)2947829-7 2524-3470 nnns volume:16 year:1999 number:1 day:01 month:02 pages:48-56 https://dx.doi.org/10.1007/BF03402856 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA AR 16 1999 1 01 02 48-56 |
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10.1007/BF03402856 doi (DE-627)SPR038592932 (SPR)BF03402856-e DE-627 ger DE-627 rakwb eng Walsh, D. E. verfasserin aut Characterization of hydrothermally dried low-rank coals 1999 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Society for Mining, Metallurgy & Exploration 1999 Abstract Over a period of eight years (1989 through 1997) the Mineral Industry Research Laboratory (MIRL) at the University of Alaska, Fairbanks, AK, has investigated the effects of temperature, residence time and particle size on the degree of low-rank coal (LRC) upgrading for a nonevaporative, hydrothermal drying process, also known as hot water drying (HWD). The following three Alaskan LRC s were used in this study: Usibelli coal (Seam No. 4) from the Nenana Coal Field, Little Tonzona coal from near McGrath, and Beluga coal from the Beluga-Yentna field on the west side of Cook Inlet. Replicated factorial tests were conducted. Experimental results indicate that most of the low-rank coal upgrading via HWD occurs rapidly within the first 10 to 20 min of residence time. Thereafter, the upgrading process slows down, and more than 100 min of additional residence time is required to produce percentage increases equivalent to what was achieved in the first 10 to 20 min. The properties of the hot water dried products were very sensitive to process temperature. Calorific value, carbon and oxygen contents, equilibrium moisture levels and Hardgrove gindabilities all appear to change linearly with temperature within the 275 °C to 325°C (525°F to 615°F) range. Coal processing (dpeaa)DE-He213 Hydrothermal drying (dpeaa)DE-He213 Coal characterization (dpeaa)DE-He213 Low-rank coals (dpeaa)DE-He213 Rao, P. D. aut Owens, H. aut Mokka, J. R. aut Noirot, O. aut Enthalten in Mining, metallurgy & exploration [Cham] : Springer International Publishing, 2019 16(1999), 1 vom: 01. Feb., Seite 48-56 (DE-627)1039800637 (DE-600)2947829-7 2524-3470 nnns volume:16 year:1999 number:1 day:01 month:02 pages:48-56 https://dx.doi.org/10.1007/BF03402856 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA AR 16 1999 1 01 02 48-56 |
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10.1007/BF03402856 doi (DE-627)SPR038592932 (SPR)BF03402856-e DE-627 ger DE-627 rakwb eng Walsh, D. E. verfasserin aut Characterization of hydrothermally dried low-rank coals 1999 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Society for Mining, Metallurgy & Exploration 1999 Abstract Over a period of eight years (1989 through 1997) the Mineral Industry Research Laboratory (MIRL) at the University of Alaska, Fairbanks, AK, has investigated the effects of temperature, residence time and particle size on the degree of low-rank coal (LRC) upgrading for a nonevaporative, hydrothermal drying process, also known as hot water drying (HWD). The following three Alaskan LRC s were used in this study: Usibelli coal (Seam No. 4) from the Nenana Coal Field, Little Tonzona coal from near McGrath, and Beluga coal from the Beluga-Yentna field on the west side of Cook Inlet. Replicated factorial tests were conducted. Experimental results indicate that most of the low-rank coal upgrading via HWD occurs rapidly within the first 10 to 20 min of residence time. Thereafter, the upgrading process slows down, and more than 100 min of additional residence time is required to produce percentage increases equivalent to what was achieved in the first 10 to 20 min. The properties of the hot water dried products were very sensitive to process temperature. Calorific value, carbon and oxygen contents, equilibrium moisture levels and Hardgrove gindabilities all appear to change linearly with temperature within the 275 °C to 325°C (525°F to 615°F) range. Coal processing (dpeaa)DE-He213 Hydrothermal drying (dpeaa)DE-He213 Coal characterization (dpeaa)DE-He213 Low-rank coals (dpeaa)DE-He213 Rao, P. D. aut Owens, H. aut Mokka, J. R. aut Noirot, O. aut Enthalten in Mining, metallurgy & exploration [Cham] : Springer International Publishing, 2019 16(1999), 1 vom: 01. Feb., Seite 48-56 (DE-627)1039800637 (DE-600)2947829-7 2524-3470 nnns volume:16 year:1999 number:1 day:01 month:02 pages:48-56 https://dx.doi.org/10.1007/BF03402856 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA AR 16 1999 1 01 02 48-56 |
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Characterization of hydrothermally dried low-rank coals |
| abstract |
Abstract Over a period of eight years (1989 through 1997) the Mineral Industry Research Laboratory (MIRL) at the University of Alaska, Fairbanks, AK, has investigated the effects of temperature, residence time and particle size on the degree of low-rank coal (LRC) upgrading for a nonevaporative, hydrothermal drying process, also known as hot water drying (HWD). The following three Alaskan LRC s were used in this study: Usibelli coal (Seam No. 4) from the Nenana Coal Field, Little Tonzona coal from near McGrath, and Beluga coal from the Beluga-Yentna field on the west side of Cook Inlet. Replicated factorial tests were conducted. Experimental results indicate that most of the low-rank coal upgrading via HWD occurs rapidly within the first 10 to 20 min of residence time. Thereafter, the upgrading process slows down, and more than 100 min of additional residence time is required to produce percentage increases equivalent to what was achieved in the first 10 to 20 min. The properties of the hot water dried products were very sensitive to process temperature. Calorific value, carbon and oxygen contents, equilibrium moisture levels and Hardgrove gindabilities all appear to change linearly with temperature within the 275 °C to 325°C (525°F to 615°F) range. © The Society for Mining, Metallurgy & Exploration 1999 |
| abstractGer |
Abstract Over a period of eight years (1989 through 1997) the Mineral Industry Research Laboratory (MIRL) at the University of Alaska, Fairbanks, AK, has investigated the effects of temperature, residence time and particle size on the degree of low-rank coal (LRC) upgrading for a nonevaporative, hydrothermal drying process, also known as hot water drying (HWD). The following three Alaskan LRC s were used in this study: Usibelli coal (Seam No. 4) from the Nenana Coal Field, Little Tonzona coal from near McGrath, and Beluga coal from the Beluga-Yentna field on the west side of Cook Inlet. Replicated factorial tests were conducted. Experimental results indicate that most of the low-rank coal upgrading via HWD occurs rapidly within the first 10 to 20 min of residence time. Thereafter, the upgrading process slows down, and more than 100 min of additional residence time is required to produce percentage increases equivalent to what was achieved in the first 10 to 20 min. The properties of the hot water dried products were very sensitive to process temperature. Calorific value, carbon and oxygen contents, equilibrium moisture levels and Hardgrove gindabilities all appear to change linearly with temperature within the 275 °C to 325°C (525°F to 615°F) range. © The Society for Mining, Metallurgy & Exploration 1999 |
| abstract_unstemmed |
Abstract Over a period of eight years (1989 through 1997) the Mineral Industry Research Laboratory (MIRL) at the University of Alaska, Fairbanks, AK, has investigated the effects of temperature, residence time and particle size on the degree of low-rank coal (LRC) upgrading for a nonevaporative, hydrothermal drying process, also known as hot water drying (HWD). The following three Alaskan LRC s were used in this study: Usibelli coal (Seam No. 4) from the Nenana Coal Field, Little Tonzona coal from near McGrath, and Beluga coal from the Beluga-Yentna field on the west side of Cook Inlet. Replicated factorial tests were conducted. Experimental results indicate that most of the low-rank coal upgrading via HWD occurs rapidly within the first 10 to 20 min of residence time. Thereafter, the upgrading process slows down, and more than 100 min of additional residence time is required to produce percentage increases equivalent to what was achieved in the first 10 to 20 min. The properties of the hot water dried products were very sensitive to process temperature. Calorific value, carbon and oxygen contents, equilibrium moisture levels and Hardgrove gindabilities all appear to change linearly with temperature within the 275 °C to 325°C (525°F to 615°F) range. © The Society for Mining, Metallurgy & Exploration 1999 |
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| title_short |
Characterization of hydrothermally dried low-rank coals |
| url |
https://dx.doi.org/10.1007/BF03402856 |
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| author2 |
Rao, P. D. Owens, H. Mokka, J. R. Noirot, O. |
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Rao, P. D. Owens, H. Mokka, J. R. Noirot, O. |
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| doi_str |
10.1007/BF03402856 |
| up_date |
2024-07-03T19:02:08.708Z |
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