Low severity coal liquefaction promoted by cyclic olefins. Quarterly report, July--September 1993

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Low-severity coal liquefaction allows for the solubilization of coal with reduced gas make. The idea being tested in this research is whether selective bond rupture occurs during liquefaction at low temperatures that can be satisfied by hydrogen donation from highly active hydrogen donor compounds. Promotion of coal solubilization through hydrogen transfer using highly active and effective hydrogen donors is the objective of this study. The highly effective hydrogen donors being tested are cyclic olefins. Representative cyclic olefins are isotetralin (ISO), which is 1,4,5,8-tetrahydronaphthalene, and 1,4,5,8,9, 10hexahydroanthracene (HHA). These compounds have been shown to highly effective donors (Bedell and Curtis, 1991) ... continued below

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24 p.

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Curtis, C. W. December 31, 1993.

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Low-severity coal liquefaction allows for the solubilization of coal with reduced gas make. The idea being tested in this research is whether selective bond rupture occurs during liquefaction at low temperatures that can be satisfied by hydrogen donation from highly active hydrogen donor compounds. Promotion of coal solubilization through hydrogen transfer using highly active and effective hydrogen donors is the objective of this study. The highly effective hydrogen donors being tested are cyclic olefins. Representative cyclic olefins are isotetralin (ISO), which is 1,4,5,8-tetrahydronaphthalene, and 1,4,5,8,9, 10hexahydroanthracene (HHA). These compounds have been shown to highly effective donors (Bedell and Curtis, 1991) which release their hydrogen at fairly low temperatures, in the 200 to 300{degrees}C range. ISO has been shown to be much more effective than its hydroaromatic analogue tetralin (TET) in releasing hydrogen at low temperatures and transferring that hydrogen to an acceptor molecule or to coal (Bedell and Curtis, 1991). Likewise, at 380{degrees}C, the ability of HHA to release hydrogen in both N{sub 2} and H{sub 2} atmospheres was greater than a comparative hydroaromatic compound, dihydroanthracene (DHA). However, when an acceptor molecule or coal was present, DHA was as or more active than HHA in transferring hydrogen (Bedell et al., 1993). In another study, at equivalent reaction conditions and in the presence of anthracene (ANT) as a hydrogen acceptor, ISO released more than 200 times as much hydrogen as TET and HHA released 18 to 25 times as much hydrogen as DHA (Wang, 1992).

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24 p.

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OSTI as DE94008005; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov

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  • Other Information: PBD: [1993]

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  • Other: DE94008005
  • Report No.: DOE/PC/91281--T8
  • Grant Number: FG22-91PC91281
  • DOI: 10.2172/10132830 | External Link
  • Office of Scientific & Technical Information Report Number: 10132830
  • Archival Resource Key: ark:/67531/metadc1315192

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  • December 31, 1993

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  • Nov. 3, 2018, 11:47 a.m.

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  • Nov. 29, 2018, 1:27 p.m.

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Curtis, C. W. Low severity coal liquefaction promoted by cyclic olefins. Quarterly report, July--September 1993, report, December 31, 1993; United States. (digital.library.unt.edu/ark:/67531/metadc1315192/: accessed January 17, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.