Flash hydropyrolysis of coal. Quarterly report No. 9, April 1-June 30, 1979
Both the North Dakota lignite and New Mexico sub-bituminous coal have been hydrogasified in the Flash Hydropyrolysis unit with yields ranging up to about 85 to 90% conversion of the available carbon at 2500 psi and 875 to 900/sup 0/C. The lignite appears to be less reactive at lower pressure than the sub-bituminous coal, producing an average of 40% gaseous yield at 1000 psi and 900/sup 0/C while the sub-bituminous produced over 50%. The reactivity of both coals is dependent on the hydrogen partial pressure but does not appear to be affected by H/sub 2//coal feed ratio. When the H/sub 2//coal ratio was reduced to 0.05 and sub-bituminous coal was run at 2500 psi and 875/sup 0/C, a high methane concentration of 57% was achieved. However, the yield or conversion of carbon to gas was limited to 30% which may be attributed to the reduction in hydrogen partial pressure during the run. Further work is being planned to obtain additional data at the lower pressure and H/sub 2//coal feed ratios. Illinois No. 6 coal, a caking bituminous, has been successfully run in the experimental equipment both treated with calcium and untreated. A reaction model, previously developed, has been modified and is being fitted to all the lignite data to produce one consistent set of pre-exponential factors and activation energies for the reaction rate equations. The experimental equipment is being modified to allow varying feed composition and especially introduction of steam into the feed gas.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 5270348
- Report Number(s):
- BNL-51107
- Country of Publication:
- United States
- Language:
- English
Similar Records
Flash Hydropyrolysis of coal. Quarterly report No. 5, January 1--March 31, 1978
Flash hydropyrolysis of coal. Progress report No. 7, July 1-December 31, 1978
Related Subjects
FLASH HYDROPYROLYSIS PROCESS
YIELDS
BITUMINOUS COAL
COAL
EXPERIMENTAL DATA
LIGNITE
MATHEMATICAL MODELS
PRESSURE DEPENDENCE
PYROLYSIS
SUBBITUMINOUS COAL
TABLES
BLACK COAL
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL GASIFICATION
COAL LIQUEFACTION
DATA
DATA FORMS
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
INFORMATION
LIQUEFACTION
NUMERICAL DATA
THERMOCHEMICAL PROCESSES
010406* - Coal & Coal Products- Pyrolysis & Cracking- (-1987)