Isotopic study of chain growth during the CO/H/sub 2/ reaction over Ni/Al/sub 2/O/sub 3/

Journal Article · Fri Apr 01 00:00:00 EST 1988 · J. Catal.; (United States)

OSTI ID:5206268

Stockwell, D M; Bennett, C O

Steady-state tracing by switches from /sup 12/COH/sub 2/ to /sup 13/COH/sub 2/ have been used to study the growth of hydrocarbon chains on a 10 wt% NiAl/sub 2/O/sub 3/ catalyst at 1 atm. Temperatures between 225 and 275/sup 0/C, and H/sub 2/CO ratios between 1 and 9 have been used in an effort to shift rate-determining steps and hydrocarbon populations. Experiments were conducted in a gradientless microreactor at low conversions. N-Alkanes and 1-olefins were produced, and the selectivity to methane varied between 40 and 91%. Traces of acetaldehyde were also detected. Under all conditions, the /sup 13/C enrichment of C/sub 3//sup +/ hydrocarbons was substantially greater than that of methane and ethane. The results indicate that some of the monomers for C/sub 3//sup +/ production may have been either CO or CH/sub x/ species derived from CO very rapidly. Discrimination between these two mechanisms was not possible

• Research Organization: Univ. of Connecticut, Storrs (USA)
• OSTI ID: 5206268
• Journal Information: J. Catal.; (United States), Vol. 110:2
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CARBON MONOXIDE
METHANATION
NICKEL
CATALYTIC EFFECTS
ACETALDEHYDE
ALKANES
ALKENES
ALUMINIUM OXIDES
CARBON 12
CARBON 13
CATALYST SUPPORTS
CHEMICAL REACTION KINETICS
ISOTOPIC EXCHANGE
METHANE
TEMPERATURE EFFECTS
ALDEHYDES
ALUMINIUM COMPOUNDS
CARBON COMPOUNDS
CARBON ISOTOPES
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HYDROCARBONS
ISOTOPES
KINETICS
LIGHT NUCLEI
METALS
NUCLEI
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
STABLE ISOTOPES
TRANSITION ELEMENTS
010408* - Coal
Lignite
& Peat- C1 Processes- (1987-)