The effect of cross-linking on the thermal decomposition of diphenylalkanes
Conference
·
OSTI ID:5714130
In the early stages of the thermal depolymerization of coal, its cross-linked macromolecular structure may restrict the diffusion of reactive intermediates and alter the reaction pathways. In an effort to model the effects of restricted mass transport on the thermally induced free radical decomposition of polymethylene units bridging aromatic clusters in coal, a series of diphenylalkanes (Ph(CH{sub 2}){sub n}Ph) have been cross-linked to an inert silica surface by the condensation of the corresponding phenol, HOC{sub 6}H{sub 4}(CH{sub 2}){sub n}C{sub 6}H{sub 4}OH. Results from the thermolysis of the diattached substrates at 350--400 {degrees}C will be presented and compared to the thermolysis of fluid phase and mono-attached diphenylalkanes ({approx}Ph(CH{sub 2}){sub n}Ph) to highlight the impact that restricted diffusion has on the reaction mechanisms.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5714130
- Report Number(s):
- CONF-920444-11-Extd.Abst.; ON: DE92007836
- Country of Publication:
- United States
- Language:
- English
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Wed May 04 00:00:00 EDT 1983
· J. Am. Chem. Soc.; (United States)
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OSTI ID:5304180
Related Subjects
01 COAL, LIGNITE, AND PEAT
010409 -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKYLATED AROMATICS
AROMATICS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
CROSS-LINKING
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN TRANSFER
HYDROXY COMPOUNDS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHENOLS
POLYMERIZATION
PYROLYSIS
RADICALS
REACTION INTERMEDIATES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
STRUCTURAL MODELS
THERMOCHEMICAL PROCESSES
010409 -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKYLATED AROMATICS
AROMATICS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
CROSS-LINKING
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN TRANSFER
HYDROXY COMPOUNDS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHENOLS
POLYMERIZATION
PYROLYSIS
RADICALS
REACTION INTERMEDIATES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
STRUCTURAL MODELS
THERMOCHEMICAL PROCESSES