Treatment of reducing gas for suppression of corrosiveness

Patent · Tue Dec 01 04:00:00 EST 1981

OSTI ID:5719914

Cull, N L

The disclosed invention embodies both catalyst and process. The catalyst is comprised of a group VIII metal, preferably a noble metal, especially platinum, or copper composited with a low acidity inorganic oxide base, preferably alumina. A bed of the catalyst is contacted at elevated temperature with nitrogen oxide containing gas at net reducing conditions to convert the nitrogen oxide to non-corrosive, innocuous by-products to render the gas useful for reservoir pressure maintenance injection needs. In all embodiments, the base with which the metal, or metals, is composited is one having an acidity ranging from about +6.8 to about +0.8 HO (Hammet acid function), preferably from about +6.8 to about +1.5 HO. Inorganic oxide bases, especially alumina, which exhibit a weakly acidic hammet acidity function, HO > or = +0.8, when impregnated with a noble metal, or copper, show a marked improvement in NOx removal vis-a-vis catalysts prepared by impregnating more strongly acidic aluminas with said metal species.

• Assignee: Exxon Research And Engineering Co
• Patent Number(s): US 4303625
• OSTI ID: 5719914
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020800* -- Petroleum-- Waste Management
023000 -- Petroleum-- Properties & Composition
CATALYSTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COPPER
CORROSION RESISTANCE
DENITRIFICATION
ELEMENTS
EXHAUST GASES
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASEOUS WASTES
GASES
METALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
PRESSURIZING
REMOVAL
TRANSITION ELEMENTS
WASTES