Catalyst dispersion and activity under conditions of temperature-staged liquefaction

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This research program involves the investigation of the use of highly dispersed catalyst precursors for the pretreatment of coals by mild hydrogenation. During the course of this effort solvent preswelling of the coal was evaluated as a means of deeply impregnating catalysts into coal, active phases of catalysts under reaction conditions were studied and the impact of these techniques were evaluated during pretreatment and temperature-staged liquefaction. Two coals, a Texas subbituminous and a Utah high volatile A bituminous, were used to examine the effects of solvent swelling pretreatment and catalyst impregnation on conversion behavior at 275[degrees]C, representative of the first, ... continued below

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Pages: (276 p)

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Davis, A.; Schobert, H.H.; Mitchell, G.D. & Artok, L. February 1, 1993.

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Description

This research program involves the investigation of the use of highly dispersed catalyst precursors for the pretreatment of coals by mild hydrogenation. During the course of this effort solvent preswelling of the coal was evaluated as a means of deeply impregnating catalysts into coal, active phases of catalysts under reaction conditions were studied and the impact of these techniques were evaluated during pretreatment and temperature-staged liquefaction. Two coals, a Texas subbituminous and a Utah high volatile A bituminous, were used to examine the effects of solvent swelling pretreatment and catalyst impregnation on conversion behavior at 275[degrees]C, representative of the first, low-temperature stage in a temperature-staged liquefaction reaction. Ferrous sulfate, iron pentacarbonyl, ammonium tetrathiomolybdate, and molybdenum hexacarbonyl were used as catalyst precursors. Without swelling pretreatment, impregnation of both coals increased conversion, mainly through increased yields of preasphaltenes.

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Pages: (276 p)

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OSTI; NTIS; GPO Dep.

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  • Other: DE93012402
  • Report No.: DOE/PC/89877-T1
  • Grant Number: AC22-89PC89877
  • DOI: 10.2172/6640187 | External Link
  • Office of Scientific & Technical Information Report Number: 6640187
  • Archival Resource Key: ark:/67531/metadc1182381

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  • February 1, 1993

Added to The UNT Digital Library

  • July 3, 2018, 8:14 a.m.

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  • Aug. 17, 2018, 1:37 p.m.

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Davis, A.; Schobert, H.H.; Mitchell, G.D. & Artok, L. Catalyst dispersion and activity under conditions of temperature-staged liquefaction, report, February 1, 1993; United States. (https://digital.library.unt.edu/ark:/67531/metadc1182381/: accessed May 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.