In situ infrared spectroscopic and catalytic studies on the oxidation of ethane over supported palladium catalysts

Journal Article · Sat Aug 01 00:00:00 EDT 1992 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(92)90092-V· OSTI ID:7007623

Trautmann, S; Baerns, M ^[1]; Auroux, A ^[2]

---

1. Univ. Bochum (Germany)
2. Inst. de Recherches sur la Catalyse, Cedex (France)

Noble metals are known to be very active catalysts in hydrocarbon reactions; they are therefore widely used in the refining, petrochemical, and fine chemical industries as well as in exhaust gas cleaning. Because of their industrial importance, the fundamentals of the catalytic transformation of hydrocarbons has often been investigated on such catalysts. However, little is known about the intermediates occurring in the interaction of saturated hydrocarbons with metal catalyst surfaces. Infrared spectroscopic (IRS) studies have shown that the adsorption of short-chain paraffins on solid surfaces is generally very weak. For example, such studies on the adsorption of C{sub 2}H{sub 6} on supported metal catalysts have shown that only physically adsorbed or very weakly chemisorbed hydrocarbon surface species may exist under high-vacuum conditions and at low temperatures. To the authors knowledge, no in situ IRS studies that deal with the oxidation of C{sub 2}H{sub 6} over supported noble metal catalysts have been reported yet. From catalytic studies it is known that oxidation of short-chain paraffins leads predominantly to total oxidation over such metals. In the present article they report results of in situ IRS measurements (323-523 K) and of catalytic experiments (473-873 K) on the oxidation of C{sub 2}H{sub 6} over {gamma}-Al{sub 2}O{sub 3}-supported and SiO{sub 2}-supported Pd catalysts which have been carried out at ambient pressure.

• OSTI ID: 7007623
• Journal Information: Journal of Catalysis; (United States), Vol. 136:2; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
ETHANE
OXIDATION
PALLADIUM
CATALYTIC EFFECTS
ABSORPTION SPECTROSCOPY
ALKANES
ALUMINIUM OXIDES
CATALYST SUPPORTS
CHEMICAL PREPARATION
CHEMISORPTION
INFRARED RADIATION
PETROLEUM
REACTION INTERMEDIATES
REFINING
SILICON OXIDES
TEMPERATURE RANGE 0400-1000 K
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCARBONS
METALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
PROCESSING
RADIATIONS
SEPARATION PROCESSES
SILICON COMPOUNDS
SORPTION
SPECTROSCOPY
SYNTHESIS
TEMPERATURE RANGE
TRANSITION ELEMENTS
020400* - Petroleum- Processing