Programmed temperature gasification study. Final report, October 1, 1979-November 30, 1980

Technical Report · Sun Nov 30 00:00:00 EST 1980

DOI:https://doi.org/10.2172/6652302· OSTI ID:6652302

Spoon, M. J.; Gardner, M. P.; Starkovich, J. A.; Fein, H. L.; Apte, A. J.

An experimental, modeling and conceptual engineering analysis study has been performed to assess the feasibility of TRW's Programmed Temperature Gasification (PTG) concept for carbonizing caking coals without severe agglomeration. The concept involves control of carbonizing heating rate to maintain metaplast concentration at a level equal to or slightly below that which causes agglomeration. The experimental studies required the contruction of a novel programmed temperature, elevated pressure, hot stage video microscope for observation of coal particle changes during heating. This system was used to develop a minimum-time heating schedule capable of carbonizing the coal at elevated pressures in the presence of hydrogen without severe agglomeration. Isothermal fixed heating rate data for a series of coals were subsequently used to calibrate and verify the mathematical model for the PTG process. These results showed good correlation between experimental data and mathematical predictions. Commercial application of the PTG concept to batch, moving bed and fluid bed processing schemes was then evaluated. Based on the calibrated model programmed temperature gasification of the coal without severe agglomeration could be carried out on a commercial batch reaction in 4 to 12 minutes. The next step in development of the PTG concept for commercial application would require testing on a bench scale (3-inch diameter) gasifier coupled with a full commercial assessment to determine size and cost of various gasification units.

• Research Organization: TRW Systems, Redondo Beach, CA (USA)
• DOE Contract Number: AC21-79MC11630
• OSTI ID: 6652302
• Report Number(s): DOE/MC/11630-T1
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
CAKING POWER
HEATING RATE
HYDROGENATION
COAL GASIFICATION
TEMPERATURE CONTROL
AGGLOMERATION
CARBONIZATION
OPTICAL MICROSCOPY
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CONTROL
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
MATERIALS
MICROSCOPY
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification
010600 - Coal
Lignite
& Peat- Properties & Composition