Flash Hydropyrolysis of coal. Quarterly report No. 5, January 1--March 31, 1978 [electronic resource]
In the entrained tubular reactor experiments on the Flash Hydropyrolysis of lignite, methane yields up to 60% (based on the carbon content of the coal) have been observed at temperatures of 875/sup 0/C and 900/sup 0/C and a hydrogen pressure of 2500 psi. These yields were obtained at coal residence...
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Online Access |
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| Format: | Government Document Electronic eBook |
| Language: | English |
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Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
1978.
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| Subjects: |
MARC
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| 245 | 0 | 6 | |a Flash Hydropyrolysis of coal. Quarterly report No. 5, January 1--March 31, 1978 |h [electronic resource] |
| 260 | |a Washington, D.C. : |b United States. Department of Energy. ; |a Oak Ridge, Tenn. : |b distributed by the Office of Scientific and Technical Information, U.S. Department of Energy, |c 1978. | ||
| 300 | |a Pages: 128 : |b digital, PDF file. | ||
| 336 | |a text |b txt |2 rdacontent. | ||
| 337 | |a computer |b c |2 rdamedia. | ||
| 338 | |a online resource |b cr |2 rdacarrier. | ||
| 500 | |a Published through SciTech Connect. | ||
| 500 | |a 06/01/1978. | ||
| 500 | |a "bnl--50894" | ||
| 520 | 3 | |a In the entrained tubular reactor experiments on the Flash Hydropyrolysis of lignite, methane yields up to 60% (based on the carbon content of the coal) have been observed at temperatures of 875/sup 0/C and 900/sup 0/C and a hydrogen pressure of 2500 psi. These yields were obtained at coal residence times of less than 5 seconds. The total carbon conversion including the ethane, benzene and CO amounts to as high as 70%. Some decomposition, resulting in lower methane yield, takes place at longer residence times. An additional 10% methane yield for a total of 70% conversion was obtained when the char from the experiment conducted at 900/sup 0/C was recycled through the systems at 900/sup 0/C. A number of experiments were conducted using lignite to study the effect of coal particle residence time on product yield and distribution. The conditions used were 2000 and 2500 psi hydrogen pressure, with and without preheating the hydrogen to reactor temperature in the range of 725 and 900/sup 0/C. Statistically significant degradation of the methane was not observed until reactor temperatures of 850 to 875/sup 0/C were reached. Several experiments using a sub-bituminous coal and preheated hydrogen were also conducted. The experimental equipment continues to operate with increased reliability and it is anticipated that the experimental program will be expanded to approximately 4 runs per week from the present 3 runs per week. A number of liquid samples collected from experiments conducted using lignite and a sub-bituminous coal plus one each from an iron-impregnated lignite and a calcium-oxide-treated bituminous coal have been examined. Some of the experimental data was fitted to two mathematical expressions, one developed from the kinetics and process variables of the system, and the second on empirical correlation. A complete conceptual design and economic analysis of a Coal Flash Hydropyrolysis Refining Complex has been initiated. | |
| 536 | |b EY-76-C-02-0016. | ||
| 650 | 7 | |a Flash Hydropyrolysis Process. |2 local. | |
| 650 | 7 | |a Chemical Reaction Yield. |2 local. | |
| 650 | 7 | |a Methane. |2 local. | |
| 650 | 7 | |a Benzene. |2 local. | |
| 650 | 7 | |a Coal Gasification. |2 local. | |
| 650 | 7 | |a Coal Liquefaction. |2 local. | |
| 650 | 7 | |a Correlations. |2 local. | |
| 650 | 7 | |a Data. |2 local. | |
| 650 | 7 | |a Hydrogenation. |2 local. | |
| 650 | 7 | |a Lignite. |2 local. | |
| 650 | 7 | |a Subbituminous Coal. |2 local. | |
| 650 | 7 | |a Toluene. |2 local. | |
| 650 | 7 | |a Xylenes. |2 local. | |
| 650 | 7 | |a Alkanes. |2 local. | |
| 650 | 7 | |a Aromatics. |2 local. | |
| 650 | 7 | |a Brown Coal. |2 local. | |
| 650 | 7 | |a Carbonaceous Materials. |2 local. | |
| 650 | 7 | |a Chemical Reactions. |2 local. | |
| 650 | 7 | |a Coal. |2 local. | |
| 650 | 7 | |a Cryogenic Fluids. |2 local. | |
| 650 | 7 | |a Energy Sources. |2 local. | |
| 650 | 7 | |a Fluids. |2 local. | |
| 650 | 7 | |a Fossil Fuels. |2 local. | |
| 650 | 7 | |a Fuels. |2 local. | |
| 650 | 7 | |a Gasification. |2 local. | |
| 650 | 7 | |a Hydrocarbons. |2 local. | |
| 650 | 7 | |a Information. |2 local. | |
| 650 | 7 | |a Liquefaction. |2 local. | |
| 650 | 7 | |a Organic Compounds. |2 local. | |
| 650 | 7 | |a Thermochemical Processes. |2 local. | |
| 650 | 7 | |a Yields. |2 local. | |
| 650 | 7 | |a Coal, Lignite, And Peat. |2 edbsc. | |
| 710 | 2 | |a Brookhaven National Laboratory. |4 res. | |
| 710 | 1 | |a United States. |b Department of Energy. |4 spn. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Office of Scientific and Technical Information. |4 dst. | |
| 856 | 4 | 0 | |u http://www.osti.gov/servlets/purl/6461458/ |z Online Access |
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