Molecular catalytic coal liquid conversion. Quarterly status report, [July--September 1995]

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The research was focused continually on the general tasks: Task 1, molecular organometallic catalysts for hydrogenation and Task 2, organic base catalysts for arene hydrogenation and the hydrotreating of the coal liquids. With regard to Task 1, the [1,5-HDRhCl]{sub 2}/buffer catalyst system has been investigated in detail to improve its performance. In the presence of CTAB, the stability of the catalyst was improved greatly. The relationship between the turnover number of the catalyst and the reaction time was obtained. Other aromatic compounds such as toluene, n-butylbenzene, tetralin, o-xylene all can be hydrogenated into the corresponding substituted cyclohexane derivatives in more ... continued below

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9 p.

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Stock, L.M. & Yang, Shiyong September 30, 1995.

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Description

The research was focused continually on the general tasks: Task 1, molecular organometallic catalysts for hydrogenation and Task 2, organic base catalysts for arene hydrogenation and the hydrotreating of the coal liquids. With regard to Task 1, the [1,5-HDRhCl]{sub 2}/buffer catalyst system has been investigated in detail to improve its performance. In the presence of CTAB, the stability of the catalyst was improved greatly. The relationship between the turnover number of the catalyst and the reaction time was obtained. Other aromatic compounds such as toluene, n-butylbenzene, tetralin, o-xylene all can be hydrogenated into the corresponding substituted cyclohexane derivatives in more than 94% yields when catalyzed by [1,5- HDRhCl]{sub 2} in the presence of small amount of surfactant molecules. The optimum catalyst system has been applied for the hydrogenation of tetralin in the presence of a coal liquid derived from the coal liquefaction. It was found that about 80-85% of tetralin in the mixture was hydrogenated to decalin under the conditions of these experiments. Task 2 was continually focused on the hydrogenation of coal liquids. Institution of dideuterium for dihydrogen in the hydrotreating of coal liquid at 250 {degrees}C and 1000 psig of dideuterium yielded a product that was characterized by {sup 2}H NMR. Two groups of deuteron located in the region of 6.5-8.0 ppm and 1.0-3.5 ppm, respectively, were observed. The former group was assigned to the deuterons on carbon atoms on aromatic rings and the latter to the deuterons linked to the aliphatic carbon atoms. In addition, naphthalene was hydrogenated completely to tetralin in the presence of the coal liquid under the same conditions, implying that the reduction of multiaromatic compounds was not adversely influenced by the existence of the coal liquid which contains potential catalysts poisons such as sulfur, nitrogen and oxygen.

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9 p.

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OSTI as DE96008514

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  • Other Information: PBD: 30 Sep 1995

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  • Other: DE96008514
  • Report No.: DOE/PC/91056--T16
  • Grant Number: AC22-91PC91056
  • DOI: 10.2172/211484 | External Link
  • Office of Scientific & Technical Information Report Number: 211484
  • Archival Resource Key: ark:/67531/metadc671143

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  • September 30, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Nov. 24, 2015, 12:58 p.m.

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Stock, L.M. & Yang, Shiyong. Molecular catalytic coal liquid conversion. Quarterly status report, [July--September 1995], report, September 30, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc671143/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.