Pyrolysis of surface-immobilized model compounds: Mechanistic implications for the thermal chemistry of coal

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Our research has been investigating the potential role that the cross-linked network structure of coal may play in perturbing free-radical reactions associated with coal thermolysis. This may be particularly important in the thermal conversion of coal at low temperatures, e.g., 350--400{degree}C, where bonds begin to break but most of the residual framework is retained. In order to assess the potential impact of restricted transport on thermal reaction pathways, we have modeled the phenomenon experimentally by studying organic model compounds that are covalently linked to an inert silica surface. The experimental methodology and significant results from studies of the thermolysis of ... continued below

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,; Britt, P F & Poutsma, M L January 1, 1990.

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Our research has been investigating the potential role that the cross-linked network structure of coal may play in perturbing free-radical reactions associated with coal thermolysis. This may be particularly important in the thermal conversion of coal at low temperatures, e.g., 350--400{degree}C, where bonds begin to break but most of the residual framework is retained. In order to assess the potential impact of restricted transport on thermal reaction pathways, we have modeled the phenomenon experimentally by studying organic model compounds that are covalently linked to an inert silica surface. The experimental methodology and significant results from studies of the thermolysis of surface-attached Ph(CH{sub 2}){sub n}Ph (n = 0--4) at 345--400{degree}C will be briefly surveyed. Initial results from studies of two-component surfaces will also be presented that reveal the role of radical migration, via facile hydrogen shuttling, in modifying the effects of diffusional constraints. 13 refs., 5 figs.

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Pages: (9 p)

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NTIS, PC A02/MF A01 - OSTI; GPO Dep.

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  • 199. national meeting of the American Chemical Society, Boston, MA (USA), 22-27 Apr 1990

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  • Other: DE90005278
  • Report No.: CONF-900402-3
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 7263944
  • Archival Resource Key: ark:/67531/metadc1446232

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1990

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  • Feb. 10, 2019, 8:45 p.m.

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  • Feb. 22, 2019, 12:47 p.m.

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,; Britt, P F & Poutsma, M L. Pyrolysis of surface-immobilized model compounds: Mechanistic implications for the thermal chemistry of coal, article, January 1, 1990; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1446232/: accessed March 18, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.