Effect of platinum concentration and dispersion on the deactivation of Pt/Al/sub 2/O/sub 3/ catalysts in the dehydrogenation of higher normal paraffins

Journal Article · Sat Jul 20 00:00:00 EDT 1985 · Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States)

DOI:https://doi.org/10.1007/BF01157351· OSTI ID:6005024

Tyupaev, A P; Isagulyants, G V; Timofeeva, E A

Pt/Al/sub 2/O/sub 3/ (PAC) catalysts with 0.3-0.6 mass % platinum are used in dehydrogenation of higher normal paraffins and in reforming. The patent literature indicates a broader range of platinum contents for these catalysts. On increasing the platinum content from 0.25 to 1.0 mass %, the activity of these catalysts in the dehydrogenation of higher normal paraffins increases, while the specific activity and selectivity relative to normal monoolefins are not altered for identical conversions. In this work the authors studied the effect of the platinum concentration and dispersion in PAC on deactivation in the dehydrogenation of higher normal paraffins and elucidated the behavior of these catalysts in a study of PAC with added lithium, indium and rhenium. It is concluded that in the dehydrogenation of normal paraffins, Pt/Al/sub 2/O/sub 3/ catalysts have greater stability with an increase in platinum content and increase in platinum dispersion with identical platinum concentration; and, the stability of these catalysts increases and their tendency towards carbon deposition decreases with increasing catalyst activity.

• Research Organization: N.D. Zelinskii Institute of Organic Chemistry, Moscow
• OSTI ID: 6005024
• Journal Information: Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States), Vol. 34:1, PART 2; Other Information: Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 194-197, January, 1985
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
ALKANES
CATALYTIC REFORMING
DEHYDROGENATION
ALUMINIUM OXIDES
CATALYTIC EFFECTS
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QUANTITY RATIO
ACTIVATION ENERGY
ADDITIVES
CARBON
CHEMICAL ACTIVATION
DEPOSITS
INDIUM
LITHIUM
MATERIALS TESTING
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RHENIUM
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ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
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HYDROCARBONS
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NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REFORMER PROCESSES
TESTING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
020400* - Petroleum- Processing