The effect of cross-linking on the thermal decomposition of diphenylalkanes

Conference · Sun Mar 01 00:00:00 EST 1992

OSTI ID:10122322

Britt, P F; Buchanan, III, A C

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: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10122322
• Report Number(s): CONF-920444-11-Extd.Abst.; ON: DE92007836
• Resource Relation: Conference: 203. American Chemical Society (ACS) national meeting,San Francisco, CA (United States),5-10 Apr 1992; Other Information: PBD: [1992]
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
01 COAL, LIGNITE, AND PEAT
ALKYLATED AROMATICS
PYROLYSIS
COAL
STRUCTURAL MODELS
SILICA
CHEMICAL REACTIONS
PHENOLS
CROSS-LINKING
RADICALS
HYDROGEN TRANSFER
REACTION INTERMEDIATES
400201
400800
010409
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
COMBUSTION, PYROLYSIS, AND HIGH-TEMPERATURE CHEMISTRY
PYROLYSIS AND CARBONIZATION