Pressure gradient passivation of carbonaceous material normally susceptible to spontaneous combustion

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Description

This invention is a process for the passivation or deactivation with respect to oxygen of a carbonaceous material by the exposure of the carbonaceous material to an oxygenated gas in which the oxygenated gas pressure is increased from a first pressure to a second pressure and then the pressure is changed to a third pressure. Preferably a cyclic process which comprises exposing the carbonaceous material to the gas at low pressure and increasing the pressure to a second higher pressure and then returning the pressure to a lower pressure is used. The cycle is repeated at least twice wherein the ... continued below

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14 p.

Creation Information

Ochs, Thomas L.; Sands, William D.; Schroeder, Karl; Summers, Cathy A. & Utz, Bruce R. January 29, 2002.

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Description

This invention is a process for the passivation or deactivation with respect to oxygen of a carbonaceous material by the exposure of the carbonaceous material to an oxygenated gas in which the oxygenated gas pressure is increased from a first pressure to a second pressure and then the pressure is changed to a third pressure. Preferably a cyclic process which comprises exposing the carbonaceous material to the gas at low pressure and increasing the pressure to a second higher pressure and then returning the pressure to a lower pressure is used. The cycle is repeated at least twice wherein the higher pressure may be increased after a selected number of cycles.

Physical Description

14 p.

Source

  • Patent File Date: 1999 Jul 15

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  • Report No.: DOE/ARC-1999-065
  • Report No.: U.S. Patent 6,146,432
  • Grant Number: None cited
  • Office of Scientific & Technical Information Report Number: 923477
  • Archival Resource Key: ark:/67531/metadc895757

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 29, 2002

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • April 3, 2017, 8:09 p.m.

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Ochs, Thomas L.; Sands, William D.; Schroeder, Karl; Summers, Cathy A. & Utz, Bruce R. Pressure gradient passivation of carbonaceous material normally susceptible to spontaneous combustion, text, January 29, 2002; [Washington D.C.]. (digital.library.unt.edu/ark:/67531/metadc895757/: accessed June 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.