Low severity coal liquefaction to determine reactivity of coals: Technical progress report No. 2 for period 09/01/86 through 11/30/86

Technical Report · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6829148

Chung, K E

The objectives of this investigation are (1) to determine the reactivity of bituminous coals for liquefaction using moderate temperature hydrogenation, and (2) to examine the reaction chemistry involved in the moderate temperature liquefaction as a function of reaction time, temperature and catalyst application. The experimental work involves hydrogenation of a bituminous coal at 325/sup 0/C in the absence of a donor solvent and catalyst. Then, the effect of reaction temperature and catalysts will be studied at temperatures between 300 and 350/sup 0/C using two catalysts, FeS/sub 2/ and ammonium molybdate. Three reactions of an Illinois bituminous coal were carried out at 325/sup 0/C under H/sub 2/ pressure of 2900 psig for 3, 14 and 27 h. Conversion to gaseous and soluble products was close to 90% in 14 and 27 h reactions. Preliminary data from the 3 h reaction showed substantially lower conversion. Yields of oil, asphaltenes and preasphaltenes were similar in the 14 and 27 h reactions: the yield ratio was 2:3:1. Elemental composition revealed that oils and asphaltenes of 14 and 27 h reactions are similar, respectively, while preasphaltenes are significantly different. Atomic H/C ratio of the products ranged from 0.95 to 1.24, indicating substantial hydrogenation and/or deoxygenation. The similar product distribution and composition indicate that the formation of oil, asphaltenes and preasphaltenes was essentially completed within 14 h of reaction time. Oil, asphaltenes and preasphaltenes are significantly different from each other in H/C ratio and oxygen content. Considering little change in the product distribution after 14 h, the differences among the fractions suggest that the fractions were derived from different precursors in the feed oil. 2 refs., 2 figs., 3 tabs.

• Research Organization: Rockwell International Corp., Thousand Oaks, CA (USA). Science Center
• DOE Contract Number: FG22-86PC90912
• OSTI ID: 6829148
• Report Number(s): DOE/PC/90912-T2; ON: DE87005901
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ALKANES
AMMONIUM COMPOUNDS
ASPHALTENES
ASPHALTS
BITUMENS
BITUMINOUS COAL
BLACK COAL
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
DATA
ENERGY SOURCES
ETHANE
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
HIGH PRESSURE
HIGH TEMPERATURE
HYDROCARBONS
HYDROGENATION
INFORMATION
INFRARED SPECTRA
IRON COMPOUNDS
IRON SULFIDES
LIQUEFACTION
MATERIALS
METHANE
MOLYBDATES
MOLYBDENUM COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
RESEARCH PROGRAMS
SPECTRA
SULFIDES
SULFUR COMPOUNDS
TAR
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YIELDS