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Title: Pressure gradient passivation of carbonaceous material normally susceptible to spontaneous combustion

Abstract

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.

Inventors:
; ; ; ;
Issue Date:
Research Org.:
Albany Research Center (ARC), Albany, OR
Sponsoring Org.:
USDOE - Office of Fossil Energy (FE)
OSTI Identifier:
923477
Patent Number(s):
DOE/ARC-1999-065 US Patent 6,146,432
Application Number:
Patent application 09/354051; TRN: US200804%%1253
Assignee:
U.S. Patent and Trademark Office The United States of America as represented by the United States Deparment of Energy, Washington, DC (US) ARC
DOE Contract Number:  
None cited
Resource Type:
Patent
Resource Relation:
Patent File Date: 1999 Jul 15
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CARBONACEOUS MATERIALS; DEACTIVATION; INVENTIONS; OXYGEN; PASSIVATION; PRESSURE GRADIENTS; SPONTANEOUS COMBUSTION

Citation Formats

Ochs, Thomas L., Sands, William D., Schroeder, Karl, Summers, Cathy A., and Utz, Bruce R. Pressure gradient passivation of carbonaceous material normally susceptible to spontaneous combustion. United States: N. p., 2002. Web.
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. United States.
Ochs, Thomas L., Sands, William D., Schroeder, Karl, Summers, Cathy A., and Utz, Bruce R. Tue . "Pressure gradient passivation of carbonaceous material normally susceptible to spontaneous combustion". United States. https://www.osti.gov/servlets/purl/923477.
@article{osti_923477,
title = {Pressure gradient passivation of carbonaceous material normally susceptible to spontaneous combustion},
author = {Ochs, Thomas L. and Sands, William D. and Schroeder, Karl and Summers, Cathy A. and Utz, Bruce R.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}