Products of liquefaction of lignite with synthesis gas by product slurry recycle

Conference · Mon Jan 01 00:00:00 EST 1979 · Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States)

OSTI ID:5204004

Farnum, B W; Knudson, C L; Koch, D A

Liquefaction of lignite is under study at the Grand Forks Energy Technology Center using a 5 lb coal per hour continuous processing unit (CPU) with various reactor configurations. The objectives of the experiment reported in this paper were (a) to test CPU operability under conditions of extensive product slurry recycle with fresh coal addition, (b) to produce a quantity of lined out lignite derived liquids for analytical characterization, and (c) to ascertain the function of reaction yields with the degree of line out or number of slurry passes. Separation of gas and liquid phases at 4000 psig and 300/sup 0/C was carried out in the unit after the products exited the reactor. The gas phase was then cooled and depressurized producing a water layer, a high pressure volatile oil layer, and tail gases. Yields calculated on a moisture and mineral free coal basis were: C/sub 1/-C/sub 4/ hydrocarbons 19%, high pressure volatile oils 19%, vacuum distillate 36%, THF soluble vacuum bottoms 9%, and THF insoluble organic polymers 11%. Figure 2 depicts on an MAF coal basis a summation of the yields of the various product fractions. Ash concentration in the product stream paralleled the THF insoluble values showing the same inclusion of inorganic fraction as coke formed in the reactor. Gas samples were analyzed by on-line gas chromatography. Effluent water samples were characterized by standard analytical methods for waste water and standard EPA methods. Figure 3 illustrates the approach to constant composition of the high pressure volatile oils collected during each pass. Low voltage low resolution mass spectrometry provided an indication of the organic oxygen compound type distribution of the high pressure volatile oils.

• Research Organization: Department of Energy, Grand Forks, ND
• OSTI ID: 5204004
• Report Number(s): CONF-790917-P3
• Journal Information: Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States), Vol. 24:3; Conference: American Chemical Society national meeting, Washington, DC, USA, 10 Sep 1979
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL LIQUEFACTION
PROCESS DEVELOPMENT UNITS
YIELDS
EXPERIMENTAL DATA
GAS ANALYSIS
GAS CHROMATOGRAPHY
GRAPHS
LIGNITE
NUCLEAR MAGNETIC RESONANCE
ON-LINE SYSTEMS
RECYCLING
SLURRIES
SYNTHESIS GAS
TABLES
BROWN COAL
CARBONACEOUS MATERIALS
CHROMATOGRAPHY
COAL
DATA
DATA FORMS
DISPERSIONS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
GASES
INFORMATION
LIQUEFACTION
MAGNETIC RESONANCE
MIXTURES
NUMERICAL DATA
RESONANCE
SEPARATION PROCESSES
SUSPENSIONS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction