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Combined surface science and catalytic studies of hydrocarbon reactions over platinum single crystal surfaces

Thesis/Dissertation ·
OSTI ID:6071593
Results from chemisorption studies under ultra-high vacuum (UHV) have been correlated with data from catalytic reactions at atmospheric pressures for some hydrocarbon reactions over platinum surfaces. Ethylidyne, which forms during room temperature chemisorption of ethylene over Pt(111), was shown to be stable towards rehydrogenation or deuterium exchange under atmospheric conditions. Ethylene hydrogenation over Pt(111) surfaces at near room temperature displayed kinetic parameters that were in agreement with those reported for supported catalysts. The exchange of ethane with D2 over Pt(111) was also studied between 470 and 620 K, and gave an activation energy of 19 kcal/mole. The product distribution peaked at one (d1) and six (dand) deuterium atoms per ethane molecule, indicating the existence of two competitive mechanisms.
Research Organization:
California Univ., Berkeley (USA)
OSTI ID:
6071593
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010403* -- Coal & Coal Products-- Hydrogenation-- (-1987)
02 PETROLEUM
020400 -- Petroleum-- Processing
ACTIVATION ENERGY
ALKANES
ALKENES
ATMOSPHERIC PRESSURE
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
DATA
DEUTERIUM
ELEMENTS
ENERGY
ETHANE
ETHYLENE
EXPERIMENTAL DATA
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN ISOTOPES
HYDROGENATION
INFORMATION
ISOTOPES
ISOTOPIC EXCHANGE
KINETICS
LIGHT NUCLEI
MEDIUM TEMPERATURE
METALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
PLATINUM
PLATINUM METALS
REACTION KINETICS
SEPARATION PROCESSES
SORPTION
STABLE ISOTOPES
SURFACE PROPERTIES
SURFACES
TRANSITION ELEMENTS
ULTRAHIGH VACUUM