Pressure gradient passivation of carbonaceous material normally susceptible to spontaneous combustion
Abstract
This invention is a process for the passivation or deactivation with resp 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:
-
- Albany, OR
- Butler, PA
- Pittsburgh, PA
- Issue Date:
- Research Org.:
- ALBANYRESEARCHCENTER
- OSTI Identifier:
- 873370
- Patent Number(s):
- 6146432
- Application Number:
- 09/354,051
- Assignee:
- United States of America as represented by Department of Energy (Washington, DC)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10L - FUELS NOT OTHERWISE PROVIDED FOR
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- pressure; gradient; passivation; carbonaceous; material; normally; susceptible; spontaneous; combustion; process; deactivation; resp; oxygen; exposure; oxygenated; gas; increased; changed; third; preferably; cyclic; comprises; exposing; increasing; returning; cycle; repeated; twice; selected; cycles; carbonaceous material; gas pressure; cyclic process; spontaneous combustion; comprises exposing; pressure gradient; oxygenated gas; material normally; /44/
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., 2000.
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/873370.
@article{osti_873370,
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 resp 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 = {2000},
month = {11}
}
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