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Carbon monoxide/water vs. hydrogen for coal liquefaction. The reduction of diphenylsulfide (DPS), thioanisole (TA), and dibenzothiophene (DBT)

Journal Article · · ACS Symp. Ser.; (United States)
OSTI ID:5953263
;
Carbon monoxide/water vs. hydrogen for (coal liquefaction. The reduction of diphenylsulfide (DPS), thioanisole (TA), and dibenzothiophene (DBT), model compounds representing typical structures occurring in lignite, was studied at 425/sup 0/C and 3000 psi total pressure, to explain the high activity of CO-H/sub 2/O, exceeding that of H/sub 2/, observed in noncatalytic liquefaction of lignite. The initial charge to the autoclave contained 750 psi of argon and 750 psi of reducing gases, i.e., H/sub 2/, CO-H/sub 2/O, or their combination. In the absence of reducing gases, DPS and DBT were stable but TA readily decomposed with approx. = 81% conversion to yield 38.2% DPS, 29.5% toluene, 4.4% benzene, and 1.4% thiophenol. Hydrogen alone or mixed with CO-H/sub 2/O was much more active in the reduction of DPS (99-100% conversion) and TA (85-86%), mainly to benzene, than the CO-H/sub 2/O mixture which converted 64.4% DPS and 40.5% TA to a complex mixture of products, including benzoic acid in 26.7 and 12.8% yields, respectively. Conversion of DBT did not exceed 2.7% (with hydrogen) and diphenyl was the only product. Addition of Na/sub 2/CO/sub 3/ or FeS, minerals that are present in lignite and might catalyze liquefaction processes, inhibited the reduction of DPS and TA by all the reducing gases and had little effect on TBP conversion. Tetralin acted as an inert diluent of the reducing gases rather than a hydrogen donor. 13 references.
OSTI ID:
5953263
Journal Information:
ACS Symp. Ser.; (United States), Journal Name: ACS Symp. Ser.; (United States) Vol. 24:2; ISSN ACSMC
Country of Publication:
United States
Language:
English

Similar Records

Carbon monoxide/Water vs. hydrogen for coal liquefaction. Reduction of diphenylsulfide (DPS), thioanisole (TA), and dibenzothiophene (DBT)
Conference · Sun Dec 31 23:00:00 EST 1978 · Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) · OSTI ID:6615646
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Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ADDITIVES
ARGON
AROMATICS
AUTOCLAVES
BENCH-SCALE EXPERIMENTS
BENZENE
BROWN COAL
BY-PRODUCTS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
COAL
COAL LIQUEFACTION
COAL LIQUIDS
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASES
HYDROCARBONS
HYDROGEN
KINETICS
LIGNITE
LIQUEFACTION
LIQUIDS
MATERIALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PURIFICATION
RARE GASES
REACTION KINETICS
THERMOCHEMICAL PROCESSES
THIOPHENOLS
WATER REQUIREMENTS