Bench-scale development of the TRW process for cleaning coal (Gravimelt process). Quarterly technical progress report, May 1984-August 1984

Technical Report · Wed Aug 01 04:00:00 EDT 1984

OSTI ID:6347322

Major progress has been made this quarter in operation of the continuous flow reactor system on Kentucky No. 11 and Pittsburgh No. 8 coal feeds and in regeneration of caustic. A very high heat content Kentucky No. 11 coal has been produced in 95% yield and with sulfur content 50% under NSPS requirements and ash content meeting NSPS requirements. Operation on Pittsburgh No. 8 coal meets NSPS requirements for sulfur oxides with ash levels similar to No. 6 fuel oil. Regeneration of spent caustic and recovery of alkali from spent acid wash solutions was achieved utilizing our new regeneration technologies. Overall analytical results showed near 97% recovery of alkali, with rejection of approximately 75% of the coal derived mineral matter on each pass. Assessment of the regeneration material balance indicates that, as forecast, there are significant analytical inaccuracies associated with utilizing the standard atomic absorption techniques for analysis. An alternate method for regeneration of the acid wash solution stream of the Gravimelt Process was assessed with the aid of a consultant and found to be an acceptable alternate route. In addition, a proposal for development of a back-up caustic regeneration scheme was received from the Martin Marietta Corporation and is under evaluation. 2 figures, 12 tables.

• Research Organization: TRW Energy Development Group, Redondo Beach, CA (USA)
• DOE Contract Number: AC22-83PC63032
• OSTI ID: 6347322
• Report Number(s): DOE/PC/63032-T4; ON: DE84016054
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
013000 -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
ALKALI METAL COMPOUNDS
ASH CONTENT
BENCH-SCALE EXPERIMENTS
CALORIFIC VALUE
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL
COMBUSTION PROPERTIES
DATA
DESULFURIZATION
EMISSION
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
GRAVIMELT PROCESS
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
MATERIAL BALANCE
MATERIALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
POTASSIUM HYDROXIDES
REGENERATION
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SULFUR COMPOUNDS
SULFUR CONTENT
SULFUR DIOXIDE
SULFUR OXIDES
TRW PROCESS