Adsorption heats of oxygen during passivation of catalyst for ammonia synthesis

Journal Article · Fri Jan 01 04:00:00 EST 1982 · Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States)

OSTI ID:5358228

Tsarev, V I; Aptekar, E L; Krylova, A V

When the adsorption heats of oxygen on the Fe catalyst for the synthesis of ammonia were measured at 20/sup 0/C, it was shown that the formation of the passivating bed proceeds via the formation of intermediate forms of the adsorbed oxygen. In its nature the oxygen of the passivating bed is close to that of the oxygen in the oxide. Under the conditions of running the commercial process for passivating the reduced pyrophoric ammonia synthesis catalyst it is necessary that the maximum temperature remain below 100/sup 0/. In connection with this we used the adsorption-calorimetric method in the present paper to study the reaction of O/sub 2/ with the NH/sub 3/ synthesis catalyst at a temperature close to the limiting passivation temperature.

• Research Organization: Academy of Sciences of the USSR, Moscow
• OSTI ID: 5358228
• Journal Information: Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States), Journal Name: Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States) Vol. 30:7; ISSN BACCA
• Country of Publication: United States
• Language: English

Related Subjects

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10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ADSORPTION HEAT
AMMONIA
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL PREPARATION
DATA
ELEMENTS
ENTHALPY
EXPERIMENTAL DATA
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
IRON
LOW PRESSURE
MEDIUM TEMPERATURE
METALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
NUMERICAL DATA
OXYGEN
PASSIVATION
PHYSICAL PROPERTIES
SORPTIVE PROPERTIES
SURFACE PROPERTIES
SYNTHESIS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS