Molten salt coal gasification process development unit. Phase 2. Final report

Technical Report · Thu Apr 01 00:00:00 EST 1982

OSTI ID:5324314

Kohl, A L; Slater, M H

This report summarizes Phase 2 of the Molten Salt Coal Gasification program. In this process, coal is gasified by contacting it with air in a turbulent pool of molten sodium carbonate at a nominal temperature of 1800/sup 0/F. Sulfur and ash are retained in the melt, and a small stream is continuously removed from the gasifier for removal of sulfur, disposal of the ash, and regeneration of sodium carbonate. The process can handle a wide variety of feed materials, including highly caking coals, and produces an environmentally clean gas, relatively free of sulfur, tars, heavy hydrocarbons, and NO/sub x/. The PDU was designed to produce low-Btu gas while processing 1 TPH of coal at pressures up to 20 atm. It is a completely integrated facility including systems for feeding solids to the gasifier, regenerating sodium carbonate for reuse, and removing sulfur as dry powdered sodium sulfate/sulfite salt and ash as a moist filter cake. During Phase I of the contract, the plant was designed and built and five test runs were made. Phase 2 was initiated for the purpose of demonstrating improved operation of the entire system over a range of gasifier pressures. Of primary interest was improving the reliability of melt overflow system and obtaining process data up to 20 atmospheres pressure. Four PDU runs, ranging in length from 83 to 170 hours of continuous gasifier operation, included operating periods at the design coal feed rate (1 TPH), design pressure (20 atm), and design ash concentration in the melt pool (20% ash). Excellent data were obtained on the gasification step which verified the model for predicting product gas composition. Performance data were also obtained on the ash removal, sulfur removal, and sodium carbonate regeneration systems of the PDU.

• Research Organization: Rockwell International Corp., Canoga Park, CA (USA). Energy Systems Group
• DOE Contract Number: AC21-77ET10296
• OSTI ID: 5324314
• Report Number(s): DOE/ET/10296-196; ESG-DOE-13386; ON: DE82014544
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
LOW BTU GAS
CALORIFIC VALUE
CHEMICAL COMPOSITION
MOLTEN SALT COAL GASIFICATION PROCESS
MATHEMATICAL MODELS
PROCESS DEVELOPMENT UNITS
SODIUM CARBONATES
REGENERATION
COAL GASIFICATION
ENERGY BALANCE
EXPERIMENTAL DATA
FLOWSHEETS
FUEL GAS
MATERIAL BALANCE
MEDIUM PRESSURE
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBONATES
COMBUSTION PROPERTIES
DATA
DIAGRAMS
FLUIDS
FUELS
FUNCTIONAL MODELS
GAS FUELS
GASES
GASIFICATION
INFORMATION
NUMERICAL DATA
OXYGEN COMPOUNDS
SODIUM COMPOUNDS
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification
010600 - Coal
Lignite
& Peat- Properties & Composition