Photochemical coal dissolution. Quarterly technical progress report, January 1--March 31, 1995

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Progress on the performance of the coal photochemical extractions this quarter has fallen behind schedule. Work on the project scheduled for other times has been pursued instead. At the beginning of the quarter, the sealing off of an undesirable solvent flow pathway in the Ace Glass photochemical reactor was unsuccessful. Due either to pre-existing strains in the glass or to poor procedure, the reactor was damaged beyond repair and a new system was ordered immediately. Shortly after experiments began with the new system, a port of the new Ace Glass reactor equipped with a screwed-down tightened O-ring seal snapped off, ... continued below

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2 p.

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Doetschman, D.C. March 23, 1995.

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Description

Progress on the performance of the coal photochemical extractions this quarter has fallen behind schedule. Work on the project scheduled for other times has been pursued instead. At the beginning of the quarter, the sealing off of an undesirable solvent flow pathway in the Ace Glass photochemical reactor was unsuccessful. Due either to pre-existing strains in the glass or to poor procedure, the reactor was damaged beyond repair and a new system was ordered immediately. Shortly after experiments began with the new system, a port of the new Ace Glass reactor equipped with a screwed-down tightened O-ring seal snapped off, a situation clearly due to a poorly annealed glass join. The reactor is presently still under return for repair. The graduate student on the project has put his energies into other project-related work. One type of work was to prepare the extracts that will be needed in future coal photoextractions. The third type of alternate activity on which the P.I. and graduate student have been working is literature work and discussion of the project. These have focused on the probable mechanisms of (1) the direct coal irradiation photolysis, (2) the extract-sensitized coal photolysis, and (3) solvent-sensitized coal photolysis. Considerations have revolved around how free radicals generated from photoexcited coal, coal extract or solvent species cause coal breakdown. How these radicals may perform some of the functions of free radicals in thermal, catalytic coal hydrogenation liquefaction is becoming clearer.

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2 p.

Notes

OSTI as DE95012429

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  • Other Information: PBD: 23 Mar 1995

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  • Other: DE95012429
  • Report No.: DOE/PC/93218--6
  • Grant Number: FG22-93PC93218
  • DOI: 10.2172/72896 | External Link
  • Office of Scientific & Technical Information Report Number: 72896
  • Archival Resource Key: ark:/67531/metadc702408

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • March 23, 1995

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Dec. 18, 2015, 5:33 p.m.

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Doetschman, D.C. Photochemical coal dissolution. Quarterly technical progress report, January 1--March 31, 1995, report, March 23, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc702408/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.