Alternative process schemes for coal conversion. Progress report No. 1, October 1, 1978--January 31, 1979
On the basis of simple, first approximation calculations, it has been shown that catalytic gasification and hydrogasification are inherently superior to conventional gasification with respect to carbon utilization and thermal efficiency. However, most processes which are directed toward the production of substitute natural gas (SNG) by direct combination of coal with steam at low temperatures (catalytic processes) or with hydrogen (hydrogasification) will require a step for separation of product SNG from a recycle stream. The success or falure of the process could well depend upon the economics of this separation scheme. The energetics for the separation of mixtures of ideal gases has been considered in some detail. Minimum energies for complete separation of representative effluent mixtures have been calculated as well as energies for separation into product and recycle streams. The gas mixtures include binary systems of H/sub 2/ and CH/sub 4/ and ternary mixtures of H/sub 2/, CH/sub 4/, and CO. A brief summary of a number of different real separation schemes has also been included. We have arbitrarily divided these into five categories: liquefaction, absorption, adsorption, chemical, and diffusional methods. These separation methods will be screened and the more promising methods examined in more detail in later reports. Finally, a brief mention of alternative coal conversion processes concludes this report.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- DOE Contract Number:
- EY-76-C-02-0016
- OSTI ID:
- 6020287
- Report Number(s):
- BNL-51011
- Country of Publication:
- United States
- Language:
- English
Similar Records
Alternative process schemes for coal conversion. Progress report No. 3, June 1-August 31, 1979
Exxon catalytic coal gasification process development program. Quarterly technical progress report, July 1-September 30, 1978
Related Subjects
COAL GASIFICATION
COMPARATIVE EVALUATIONS
THERMAL EFFICIENCY
FUEL GAS
SEPARATION PROCESSES
ADSORPTION
CARBON DIOXIDE ACCEPTOR PROCESS
CARBON MONOXIDE
CHEMISTRY
DIFFUSION
EXXON GASIFICATION PROCESS
FLASH HYDROPYROLYSIS PROCESS
FLOWSHEETS
HIGH BTU GAS
HYDRANE PROCESS
HYDROGEN
LIQUEFACTION
METHANE
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
COAL LIQUEFACTION
CRYOGENIC FLUIDS
DIAGRAMS
EFFICIENCY
ELEMENTS
ENERGY SOURCES
FLUIDS
FUELS
GAS FUELS
GASES
GASIFICATION
HYDROCARBONS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SNG PROCESSES
SORPTION
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification