Rh/SiO/sub 2/ and Rh/Al/sub 2/O/sub 3/ catalysts: effect of precursor and H/sub 2/ pretreatment on chemisorption and catalytic activity

Journal Article · Tue Apr 01 00:00:00 EST 1986 · J. Catal.; (United States)

OSTI ID:5204050

Nunez, G M; Patrignani, A R; Rouco, A J

In a previous work it was suggested that the nature of the precursor was important in determining the oxidation state of Rh in supported catalysts and therefore in their catalytic activity. The initial purpose of the present study was to investigate the influence of the metal precursor (RhCl/sub 3/ or Rh(NO/sub 3/)/sub 3/) used in the preparation, on the catalytic activity of Al/sub 2/O/sub 3/- and SiO/sub 2/-supported Rh catalysts. The reactions chosen for that purpose were the hydrogenolysis of ethane and the hydrogenation of benzene. The observation that on Al/sub 2/O/sub 3/-supported catalysts the activity for ethane hydrogenolysis was increasing with time at temperatures slightly higher than the reduction temperature prompted the authors to determine the effect of rereduction temperature on the catalytic activity. The results of this study are also presented in this note. TPR, TPD, and H/sub 2/ chemisorption techniques were used in the characterization of the catalysts. 8 references.

• Research Organization: PLAPIQUI (UNS-CONICET), Bahia Blanca (Argentina)
• OSTI ID: 5204050
• Journal Information: J. Catal.; (United States), Vol. 98:2
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
BENZENE
HYDROGENATION
ETHANE
CATALYTIC REFORMING
RHODIUM
CATALYTIC EFFECTS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CHEMICAL PREPARATION
CHEMICAL STATE
CHEMISORPTION
COMPARATIVE EVALUATIONS
NITRATES
OXIDATION
REDUCTION
RHODIUM CHLORIDES
RHODIUM COMPOUNDS
SILICA
ALKANES
ALUMINIUM COMPOUNDS
AROMATICS
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
METALS
MINERALS
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REFORMER PROCESSES
REFRACTORY METAL COMPOUNDS
SEPARATION PROCESSES
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
020400* - Petroleum- Processing