Effect of chloroform-solubles in coal conversion in non-hydrogen-donating solvents

Larsen, John W.; Sams, T.L.; Rodgers, B.R.

doi:10.1016/0016-2361(80)90132-5

Cited by 24 publications

(3 citation statements)

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“…However, at the same time, Ouchi further developed his γ compound hypothesis, establishing a linear correlation between the amount of quinoline extractables (corrected for inertinite content) and the log of maximum fluidity measured by Gieseler plastometer. Contrary to the results reported by Neavel and Marsh, , Larsen, and Seki, Ouchi contended that the pyridine and quinoline extracts have no hydrogen transfer properties. , …”

Section: Introductionmentioning

confidence: 61%

In-Situ ¹H NMR Investigation of Particle Size, Mild Oxidation, and Heating Regime Effects on Plasticity Development during Coal Carbonization

1997

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High-temperature in-situ 1H NMR with a probe operating at a frequency of 100 MHz has been used to quantify the effects of particle size, mild oxidation, and different heating regimes on plasticity development for a low-volatile Australian bituminous coal in terms of the proportions of rigid and fluid material present. At the temperature of maximum fluidity, the fluid phase accounts for 35% of the hydrogen remaining, with both its concentration and mobility increasing up to this temperature. Reducing the particle size below ca. 150 μm suppresses plasticity through a reduction in the mobility of the fluid phase with the concentration of rigid material remaining constant. This effect is considerably more pronounced with slow heating than it is with fast heating (3−4 cf. 30 °C min-1). In contrast, suppressing the fluidity by mild oxidation reduces primarily the concentration of the fluid phase. Isothermal treatments give rise to a loss of fluidity due to reductions in both the proportion and mobility of the fluid component. The in-situ measurements have confirmed that plasticity development is a reversible phenomenon provided that relatively fast quenching rates (ca. 75 °C min-1) are used. These results are discussed in relation to estimating the contribution to fluidity development from the non-solvent-extractable material in coals. Heating coking coal in a tube furnace to the temperature of maximum fluidity followed by fairly rapid cooling is shown to be a simple procedure for recovering relatively large amounts of partially carbonized coal with the structural features responsible for maximum fluidity preserved.

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Section: Introductionmentioning

confidence: 61%

In-Situ ¹H NMR Investigation of Particle Size, Mild Oxidation, and Heating Regime Effects on Plasticity Development during Coal Carbonization

1997

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“…It has been shorn that the chloroform-soluble material in coals correlates xith fluid properties, and that, the removal of these materials can destroy the fluid behavior and reduce the liquefaction conversion yield (Van kevelen, 1961;Larsen et al, 1980). Brokn and Waters (.1966a) showed that the yield of the chloroform extractables reaches a maximum between 85-90 % maf carbon.…”

Section: Coal Composition and Liquefactionmentioning

confidence: 99%

The mobile phase in coals: Its nature and modes of release: Final report: Part 1, Structural inferences from dry catalytic hydrogenation of a subbituminous coal

Terrer¹,

Derbyshire²

1986

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“…Addition of benzophenone accelerated condensation to the furans and eliminated the reduction of naphthol in favor of almost exclusive fo,;rmation of diphenylmethane. This has considerable implication for coal conversion processes, as will be discussed later.115Experimental data from Oak Ridge National Laboratory1,78,116 identified the importance of internal hydrogen redistribution in addition to simple solubilization. In this .experimentation using phenol as a nondonor solvent, a hydrogen-enriched soluble portion along with a hydrogen-depleted char was produced in the absence of hydrogen gas.…”

mentioning

confidence: 99%

Studies of the effect of selected nondonor solvents on coal liquefaction yields

Jolley¹,

Rodgers²,

Benjamin³

et al. 1983

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This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of the ir employees , makes any warranty , express or implied , or assumes any legal liab ility or respons ibi lity for the accuracy, completeness, or usefu lness of any information , apparatus , product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product , process , or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its ondorcomont, rocommondnt ion , or favor ing b~• thoU nitod Stntoc Government or any agency thereof. The views and op inions of authors expressed herein do not necessarily state or reflect those of the United States Government or an y agency thereof.

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Effect of chloroform-solubles in coal conversion in non-hydrogen-donating solvents

Cited by 24 publications

References 1 publication

In-Situ ¹H NMR Investigation of Particle Size, Mild Oxidation, and Heating Regime Effects on Plasticity Development during Coal Carbonization

In-Situ ¹H NMR Investigation of Particle Size, Mild Oxidation, and Heating Regime Effects on Plasticity Development during Coal Carbonization

The mobile phase in coals: Its nature and modes of release: Final report: Part 1, Structural inferences from dry catalytic hydrogenation of a subbituminous coal

Studies of the effect of selected nondonor solvents on coal liquefaction yields

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Effect of chloroform-solubles in coal conversion in non-hydrogen-donating solvents

Cited by 24 publications

References 1 publication

In-Situ 1H NMR Investigation of Particle Size, Mild Oxidation, and Heating Regime Effects on Plasticity Development during Coal Carbonization

In-Situ 1H NMR Investigation of Particle Size, Mild Oxidation, and Heating Regime Effects on Plasticity Development during Coal Carbonization

The mobile phase in coals: Its nature and modes of release: Final report: Part 1, Structural inferences from dry catalytic hydrogenation of a subbituminous coal

Studies of the effect of selected nondonor solvents on coal liquefaction yields

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Product

Resources

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In-Situ ¹H NMR Investigation of Particle Size, Mild Oxidation, and Heating Regime Effects on Plasticity Development during Coal Carbonization

In-Situ ¹H NMR Investigation of Particle Size, Mild Oxidation, and Heating Regime Effects on Plasticity Development during Coal Carbonization