Enhanced catalysis by solvent improvement. Quarterly technical progress report, 1 April-30 June 1983

Technical Report · Mon Oct 31 23:00:00 EST 1983

OSTI ID:7006824

Garg, D; Miller, R N; Givens, E N; Tarrer, A R; Guin, J A; Curtis, C W

This report describes the results from liquefaction solvent modification, coal liquefaction with original and modified solvents, catalyst selection, coal pretreatment, and pretreatment followed by liquefaction experiments. The effect of liquefaction reaction conditions on product distribution is also covered in this report. Significant removal of nitrogen compounds from coal-derived liquefaction solvent was obtained by treating it with anhydrous hydrochloric acid or silica gel. The removal of nitrogen compounds with HCl or silica gel was also accompanied by 25 to 40% removal of oxygen compounds. Treating liquefaction solvent with aqueous NaOH or zeolite removed significant amounts of phenolic compounds. Oxygen removal was also accompanied by a partial removal of nitrogen compounds. Sequential treatment of coal-derived liquefaction solvent with HCl followed by silica gel or NaOH followed by HCl resulted in complete removal of nitrogen compounds. Liquefying coals in the presence of coal-derived liquefaction solvents modified by the removal of nitrogen or oxygen compounds or both significantly increased the oil yield in the absence of catalyst. The overall coal conversion, however, decreased only slightly with these treated solvents. A significant increase in the oil yield was also noted during catalytic liquefaction with the pretreated solvents. The overall coal conversion also increased during catalytic liquefaction of coal. At a concentration level of 250 ppM metal based on coal molybdenum catalyst was more active than nickel. At this level the activity of molybdenum was also higher than that noted with 1 wt% iron or zinc. Combination of metals such as iron and molybdenum or zinc and molybdenum yielded significantly higher oil yield compared to individual metals alone. 1 ref., 2 figs., 28 tabs.

• Research Organization: Air Products and Chemicals, Inc., Allentown, PA (USA); Auburn Univ., AL (USA)
• DOE Contract Number: AC22-82PC50003
• OSTI ID: 7006824
• Report Number(s): DOE/PC/50003-17; ON: DE87001918
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ADSORBENTS
ALKALI METAL COMPOUNDS
AROMATICS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COAL LIQUEFACTION
COMPARATIVE EVALUATIONS
DATA
DENITRIFICATION
ELEMENTS
EXPERIMENTAL DATA
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ACIDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IRON
LIQUEFACTION
MATERIALS
METALS
MINERALS
MOLYBDENUM
NICKEL
NUMERICAL DATA
OIL YIELDS
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
OXYGEN COMPOUNDS
PHENOLS
REMOVAL
RESEARCH PROGRAMS
SILICA GEL
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SOLVENTS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
YIELDS
ZEOLITES
ZINC