Test and evaluate the tri-gas low-Btu coal-gasification process. Final report, October 21, 1977-October 31, 1980

Technical Report · Mon Dec 01 00:00:00 EST 1980

DOI:https://doi.org/10.2172/6574361· OSTI ID:6574361

Zabetakis, M. G.

This report describes the continuation of work done to develop the BCR TRI-GAS multiple fluidized-bed gasification process. The objective is the gasification of all ranks of coals with the only product being a clean, low-Btu fuel gas. Design and construction of a 100 lb/h process and equipment development unit (PEDU) was completed on the previous contract. The process consists of three fluid-bed reactors in series, each having a specific function: Stage 1 - pretreatment; Stage 2- - gasification; Stage 3 - maximization of carbon utilization. Under the present contract, 59 PEDU tests have been conducted. A number of these were single-stage tests, mostly in Stage 1; however, integrated PEDU tests were conducted with a western coal (Rosebud) and two eastern coals (Illinois No. 6 and Pittsburgh seam). Both Rosebud and Pittsburgh seam coals were gasified with the PEDU operating in the design mode. Operation with Illinois No. 6 seam coal was also very promising; however, time limitations precluded further testing with this coal. One of the crucial tasks was to operate the Stage 1 reactor to pretreat and devolatilize caking coals. By adding a small amount of air to the fluidizing gas, the caking properties of the coal can be eliminated. However, it was also desirable to release a high percentage of the volatile matter from the coal in this vessel. To accomplish this, the reactor had to be operated above the agglomerating temperature of caking coals. By maintaining a low ratio of fresh to treated coal, this objective was achieved. Both Illinois No. 6 and Pittsburgh seam coals were treated at temperatures of 800 to 900 F without agglomerating in the vessel.

• Research Organization: Bituminous Coal Research, Inc., Monroeville, PA (USA)
• DOE Contract Number: AC21-78ET10254
• OSTI ID: 6574361
• Report Number(s): DOE/ET/10254-88
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
TRI-GAS PROCESS
PROCESS DEVELOPMENT UNITS
COAL
COAL GASIFICATION
DEVOLATILIZATION
EXPERIMENTAL DATA
FLUIDIZED BED
LOW BTU GAS
OPERATION
CARBONACEOUS MATERIALS
DATA
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
FUNCTIONAL MODELS
GAS FUELS
GASES
GASIFICATION
INFORMATION
MATERIALS
NUMERICAL DATA
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification