Dehydrogenation of cyclohexane on technetium catalysts

Journal Article · Sat May 01 04:00:00 EDT 1982 · Dokl. Phys. Chem. (Engl. Transl.); (United States)

OSTI ID:6598211

Spitsyn, V I; Prokhorets, N M; Pirogova, G N

This paper presents a study of the catalytic properties of technetium using the dehydrogenation of cyclohexane as a model for study. The catalysts were prepared by impregnation of the carrier with a solution of ammonium pertechnetate; after drying under vacuum in a rotary evaporator it was reduced by hydrogen initially to the dioxide at 280-300/sup 0/C and then to metallic technetium at 700/sup 0/C for 12 h. The specific surface of technetium in the catalysts and its relative dispersity was established from the chemisorption of H and CO at 25/sup 0/C. The comparative method developed in was used. The catalystic experiments were conducted in a flow type apparatus. The cyclohexane feed rate was 0.07 ml/min, the amount of catalyst was 1 cm/sup 3/. After each experiment regeneration of the catalysts with hydrogen was carried out for 30 min, and before the following experiment the hydrogen was expelled with nitrogen. The stability of operation of the catalysts was verified experimentlly for raised and lowered temperatures. The rate of reaction was estimated from the rate of liberation of hydrogen. The reaction products were analyzed by gas chromatography. The compositon of the gaseous phase was monitored continuously throughout the entire reaction. The liquid fraction was analyzed after termination of each experiment. The study showed that technetium is an active and selective catalysts for the dehydrogenation of cyclohexane.

• Research Organization: Academy of Sciences of the USSR, Moscow
• OSTI ID: 6598211
• Journal Information: Dokl. Phys. Chem. (Engl. Transl.); (United States), Journal Name: Dokl. Phys. Chem. (Engl. Transl.); (United States) Vol. 261:1-3; ISSN DKPCA
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080201 -- Hydrogen-- Chemisorption Storage
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACTIVATION ENERGY
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
CYCLOALKANES
CYCLOHEXANE
DATA
DEHYDROGENATION
ELECTRON MICROSCOPY
ELEMENTS
ENERGY
EXPERIMENTAL DATA
HIGH TEMPERATURE
HYDROCARBONS
INFORMATION
METALS
MICROSCOPY
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SORPTION
TECHNETIUM
TRANSITION ELEMENTS