Alternative process schemes for coal conversion. Progress report No. 1, October 1, 1978--January 31, 1979

Technical Report · Thu Feb 01 04:00:00 EST 1979

DOI:https://doi.org/10.2172/6020287· OSTI ID:6020287

Sansone, M. J.

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., Upton, NY (USA)
• DOE Contract Number: EY-76-C-02-0016
• OSTI ID: 6020287
• Report Number(s): BNL-51011
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ADSORPTION
ALKANES
CARBON COMPOUNDS
CARBON DIOXIDE ACCEPTOR PROCESS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMISTRY
COAL GASIFICATION
COAL LIQUEFACTION
COMPARATIVE EVALUATIONS
CRYOGENIC FLUIDS
DIAGRAMS
DIFFUSION
EFFICIENCY
ELEMENTS
ENERGY SOURCES
EXXON GASIFICATION PROCESS
FLASH HYDROPYROLYSIS PROCESS
FLOWSHEETS
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HIGH BTU GAS
HYDRANE PROCESS
HYDROCARBONS
HYDROGEN
LIQUEFACTION
METHANE
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SNG PROCESSES
SORPTION
THERMAL EFFICIENCY
THERMOCHEMICAL PROCESSES