Properties of supported metal catalysts. Progress report, April 1--June 30, 1979. [Al/sub 2/O/sub 3/-supported Pt]

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

DOI:https://doi.org/10.2172/6059114· OSTI ID:6059114

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 sensitive 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).

• Research Organization: Northwestern Univ., Evanston, IL (USA)
• Sponsoring Organization: USDOE
• OSTI ID: 6059114
• Report Number(s): COO-4254-2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
ELEMENTS
MECHANICAL STRUCTURES
METALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
RESEARCH PROGRAMS
SUPPORTS
TRANSITION ELEMENTS