Properties of supported metal catalysts. Progress report, April 1, 1978-March 31, 1979

Technical Report · Thu Mar 01 04:00:00 EST 1979

OSTI ID:6176920

Burwell, Jr, R L; Butt, J B; Cohen, J B

The preparation and characterization of supported platinum catalysts has been extended to a series of alumina-supported catalysts similar to the previously investigated platinum - silica series. Characterization has been carried out via hydrogen chemisorption, hydrogen-oxygen titration, hydrogenolysis of methylcyclopropane and deuterium exchange with cyclopentane. In all, some twenty catalysts, with platinum percentage exposed ranging from 4.1 to 103% have been prepared and characterized. As was the case for the silica supported platinum, the specific conditions of catalyst pretreatment have been found to affect substantially the structure sensitive behavior in all cases. In addition, the thermal conditions employed in catalyst preparation affect the nature of structure sensitve behavior, which was not the case for Pt/SiO/sub 2/. Substantial effort has been devoted to the development of a suitable system for making x-ray measurements in controlled atmospheres. Several of the Pt/SiO/sub 2/ catalysts have been investigated in hydrogen atmospheres, with the curious result that the apparent loading of metal detected in hydrogen is lower than that determined in air (which agreed with the value determined in preparation). This phenomenon is being investigated further. Finally, we have begun to examine the Pt/Al/sub 2/O/sub 3/ series; current efforts are aimed at finding loading levels which provide adequate intensity.

• Research Organization: Northwestern Univ., Evanston, IL (USA)
• DOE Contract Number: AC02-77ER04254
• OSTI ID: 6176920
• Report Number(s): DOE/ER/04254-T2; ON: DE85006079
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400303 -- Organic Chemistry-- Isotope Exchange & Isotope Separation-- (-1987)
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
CYCLOALKANES
DEUTERIUM
ELEMENTS
HYDROCARBONS
HYDROGEN
HYDROGEN ISOTOPES
HYDROGENATION
ISOTOPES
ISOTOPIC EXCHANGE
LIGHT NUCLEI
METALS
MINERALS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
RESEARCH PROGRAMS
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
STABLE ISOTOPES
TRANSITION ELEMENTS