Iridium material for hydrothermal oxidation environments

Patent · Mon Jan 01 00:00:00 EST 1996

OSTI ID:870475

Hong, Glenn T ^[1]; Zilberstein, Vladimir A ^[2]

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1. Tewksbury, MA
2. Brookline, MA

A process for hydrothermal oxidation of combustible materials in which, during at least a part of the oxidation, corrosive material is present and makes contact with at least a portion of the apparatus over a contact area on the apparatus. At least a portion of the contact surface area comprises iridium, iridium oxide, an iridium alloy, or a base metal overlaid with an iridium coating. Iridium has been found to be highly resistant to environments encountered in the process of hydrothermal oxidation. Such environments typically contain greater than 50 mole percent water, together with oxygen, carbon dioxide, and a wide range of acids, bases and salts. Pressures are typically about 27.5 to about 1000 bar while temperatures range as high as 800.degree. C.

• DOE Contract Number: C94-170508
• Assignee: Modar, Inc. (Natick, MA)
• Patent Number(s): US 5527471
• OSTI ID: 870475
• Country of Publication: United States
• Language: English

Related Subjects

iridium
material
hydrothermal
oxidation
environments
process
combustible
materials
corrosive
makes
contact
portion
apparatus
surface
comprises
oxide
alloy
base
metal
overlaid
coating
found
highly
resistant
encountered
typically
contain
50
mole
percent
water
oxygen
carbon
dioxide
wide
range
acids
bases
salts
pressures
27
1000
bar
temperatures
800
degree
thermal oxidation
contact surface
carbon dioxide
mole percent
wide range
base metal
combustible material
typically contain
percent water
combustible materials
iridium alloy
oxidation environments
highly resistant
hydrothermal oxidation
corrosive material
makes contact
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