Solvent refined lignite process development. Quarterly technical progress report No. 3, January--March 1978

Technical Report · Wed Jul 12 00:00:00 EDT 1978

DOI:https://doi.org/10.2172/6318238· OSTI ID:6318238

Severson, D E

Six runs, each nominally at one week's duration, M-34 through M-39, were completed; this concludes the PDU experimental program for Project Lignite. The first three runs concluded the series to study the effects of different lignites on plant operability and product yields. Runs M-37 and M-38 were made using two Montana subbituminous coals. It was concluded that coals with the highest ash content, both lignite and subbituminous coals, gave greater overall conversion to gaseous and liquid organic products. The subbituminous coals gave lower gas yields and lower overall conversion while producing similar liquid yields when compared with lignite. Reactor solids build up rapidly during initial operations, then level off and remain constant at 29 pounds per cubic foot of reactor volume as a run proceeds. Reactor solids evidently are composed of clay minerals and large particles of pyridine insoluble organic material when processing either lignites or subbituminous coals; in addition calcium/magnesium carbonate crystals (calcite/dolomite) are present in the case of lignite. Long term, trouble-free operation of the deashing unit was not accomplished. Integration of the unit for several hours of combined operation of the process was achieved, and the product from the deashing unit contained as low as 0.6% ash and pyridine insoluble material. Solids buildup in the solids settling tower was a continuing problem.

• Research Organization: North Dakota Univ., Grand Forks (USA). Engineering Experiment Station
• DOE Contract Number: EF-77-C-02-4189
• OSTI ID: 6318238
• Report Number(s): COO-4189-14
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL LIQUEFACTION
MATERIAL BALANCE
YIELDS
COAL LIQUIDS
DEASHING
CHEMICAL COMPOSITION
EXPERIMENTAL DATA
FLOWSHEETS
FUEL GAS
LIGNITE
PROCESS DEVELOPMENT UNITS
SOLVENT-REFINED COAL
SUBBITUMINOUS COAL
TABLES
BROWN COAL
CARBONACEOUS MATERIALS
COAL
DATA
DATA FORMS
DIAGRAMS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
GAS FUELS
GASES
INFORMATION
LIQUEFACTION
NUMERICAL DATA
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
010402 - Coal
Lignite
& Peat- Purification & Upgrading