Ultrahigh-vacuum chamber equipped with a reaction cell for studying liquid-phase catalytic reactions

Journal Article · Sat May 01 00:00:00 EDT 1993 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1144084· OSTI ID:6884737

Gardin, D E; Somorjai, G A ^[1]

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1. Materials Sciences Division, Lawrence Berkeley Laboratory, and Department of Chemistry, University of California, Berkeley, California 94720 (United States)

We describe the construction and operation of a liquid-phase reaction cell designed in our laboratory that is attached to an ultrahigh-vacuum (UHV) chamber equipped with the traditional surface science techniques for structure and composition analysis. The sample surface can be prepared and characterized in the UHV chamber prior to transfer in the liquid-phase reaction cell. The transfer has been designed so that there is no loss of the UHV chamber vacuum integrity, as few parts as possible come into contact with the liquid, the surface stays clean during the transfer. The liquid-phase reaction cell itself is designed to study liquid-phase hydrogenation reactions at pressures up to 2 atm and temperatures up to 70 [degree]C. A 1-mm-diam liquid jet with a velocity up to 6 m/s is produced by a gear pump that is incident on the sample surface to allow good mass transfer at the liquid-solid interface. The progress of the reaction is followed by gas chromatography. We report the reaction rate data for the hydrogenation of cyclohexene on a platinum foil.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6884737
• Journal Information: Review of Scientific Instruments; (United States), Vol. 64:5; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
CHEMICAL REACTORS
DESIGN
VACUUM SYSTEMS
CYCLOHEXANE
GAS CHROMATOGRAPHY
GAS FLOW
HYDROGENATION
LAWRENCE BERKELEY LABORATORY
SAMPLE HOLDERS
ULTRAHIGH VACUUM
ALKANES
CHEMICAL REACTIONS
CHROMATOGRAPHY
CYCLOALKANES
FLUID FLOW
HYDROCARBONS
NATIONAL ORGANIZATIONS
ORGANIC COMPOUNDS
SEPARATION PROCESSES
US AEC
US DOE
US ERDA
US ORGANIZATIONS
440800* - Miscellaneous Instrumentation- (1990-)