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Preconversion processing of bituminous coals [electronic resource] : New directions to improved direct catalytic coal liquefaction.

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Bibliographic Details
Online Access: Online Access
Corporate Author: National Energy Technology Laboratory (U.S.) (Researcher)
Format: Government Document Electronic eBook
Language:English
Published: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Defense ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1992.
Subjects:
Information.
Experimental Data.
Black Coal.
Thermochemical Processes.
Organic Compounds.
Coal Liquefaction.
Document Types.
Dissociation.
Alkylated Aromatics.
Chemical Preparation.
Liquefaction.
Fuels.
Energy Sources.
Materials.
Coal.
Progress Report.
Toluene.
Organic Nitrogen Compounds.
Numerical Data.
Heterocyclic Compounds.
Azines.
Synthesis.
Pyridines.
Carbonaceous Materials.
Coal Extracts.
Heat Treatments.
Bituminous Coal.
Swelling.
Aromatics.
Fossil Fuels.
Pyridine.
Data.
Hydrocarbons.
Coal, Lignite, And Peat.
Description
Abstract:A study of high-temperature soaking has been continued. Two high-volatile bituminous coals and three coal liquids were used. Large pyridine extractabilities of more than 70 wt% were obtained for aR cases. A better understanding Of the mechanism is important for the development of coal preconversion using the high-temperature soaking. To investigate the mechanism of the change in coal solubilization by high-temperature soaking, a simple soaking experiment was conducted. The extract from the Illinois No. 6 coal was treated in toluene at three different temperatures, and the treated samples were analyzed by coal swelling using the recently developed method. Furthermore, effects of soaking time, soaking temperature, soluble portions, and coal rank were examined by using actual coal liquids. Although a cross-linked, three-dimensional macromoleculer model has been widely accepted for the structure of coat it has previously been reported that significant portions (far more generally believed) of coal molecules are physically associated. It is known, as reviewed in that paper, that most portions of bituminous coal can be disintegrated in coal derived liquids and polycyclic aromatic hydrocarbons at 300--400°C (high-temperature soaking). It was proposed that electron donors and acceptors of low molecular mass contained in these materials substitute coal-coal complexes with charge-transfer interactions. This is physical dissociation of associated coal molecules. However, chemical reactions may occur at these temperatures.
Item Description:Published through the Information Bridge: DOE Scientific and Technical Information.
08/01/1992.
"doe/pc/91041-t1"
" bcrnl-l--1663"
"DE93000302"
BCR National Lab., Pittsburgh, PA (United States)
Physical Description:Pages: (27 p) : digital, PDF file.

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