Exploratory study of coal conversion chemistry. Quarterly report No. 2, August 19, 1981-November 18, 1981. [Hydroxydipnenylmethanes, triphenylmethane, diphenylether]

Technical Report · Fri Jan 29 04:00:00 EST 1982

DOI:https://doi.org/10.2172/5379908· OSTI ID:5379908

This report describes work accomplished under two tasks: Task A, mechanisms of donor-solvent coal liquefaction, and Task B, CO/H/sub 2/O conversion systems. Under Task A, we describe additional evidence relating to the question of the mechanism of the iron oxide catalyzed cleavage of hydroxydiphenylmethanes. o-Hydroxydiphenylmethane is relatively more sensitive to catalysis by Fe/sub 3/O/sub 4/, a possible one electron oxidant, and triphenylmethane is relatively more sensitive to catalyzed cleavage by SiO/sub 2//Al/sub 2/O/sub 3/, a strong Bronsted acid catalyst. This provides further evidence that in the former case the reactions of radical cations are important in the cleavage mechanism. Tests with Cr/sub 2/O/sub 3/ show it to be ineffective under our reaction conditions as a catalyst for hydroxydiphenylmethane cleavage. We have also used the decomposition of diphenylether in tetralin, which we have previously shown to occur by a radical displacement reaction, as an indicator of steady state radical concentration in tetralin. The results of these experiments indicate that radical concentrations in tetralin are not significantly increased by spiking the tetralin with 1,2-dihydronaphthalene. This in turn suggests that rapid disproportionation of 1,2-dihydronaphthalene to tetralin and naphthalene takes place by way of a concerted reaction, in addition to a slower radical disproportionation process that may provide the steady state radical concentration supported by the equilibrium concentration of 1,2-dihydronaphthalene. Under Task B1, we have found a correlation between initial pH and CO pressure on the conversion of PSOC-26 coal to toluene soluble products. A pH dependence was also observed for PSOC-233 coal, similar to results with PSOC-26. Under Task B2, we have studied anisole as a model oxygen containing structure in coal.

• Research Organization: SRI International, Menlo Park, CA (USA)
• DOE Contract Number: AC22-81PC40785
• OSTI ID: 5379908
• Report Number(s): DOE/PC/40785-2; ON: DE82011703
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600 -- Coal
Lignite
& Peat-- Properties & Composition
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ANISOLE
AROMATICS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL BONDS
CHEMICAL REACTIONS
CHEMISTRY
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
CLEAVAGE
COAL LIQUEFACTION
CONDENSED AROMATICS
CRYSTAL STRUCTURE
DATA
DECOMPOSITION
ETHERS
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGEN TRANSFER
HYDROXY COMPOUNDS
INFORMATION
IRON COMPOUNDS
IRON OXIDES
LIQUEFACTION
MICROSTRUCTURE
MINERALS
NAPHTHALENE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SOLVENTS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PHENOLS
PRESSURE DEPENDENCE
RADICALS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SOLVENTS
STRUCTURAL MODELS
TETRALIN
THERMOCHEMICAL PROCESSES
TOLUENE
TRANSITION ELEMENT COMPOUNDS