Oxidative coupling of methane in a fluidized-bed reactor over a highly active and selective catalyst

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie950145s· OSTI ID:183024

Mleczko, L; Pannek, U ^[1]; Niemi, V M; Hiltunen, J ^[2]

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1. Ruhr-Universitaet, Bochum (Germany). Lehrstuhl fuer Technische Chemie
2. NESTE OY, Porvoo (Finland). Technology Centre

Oxidative coupling of methane to C{sub 2+} hydrocarbons over a Zr/La/Sr catalyst was investigated in an atmospheric-pressure shallow fluidized-bed reactor (i.d. = 5 cm; H{sub mf} = 1.4--3.2 cm) at temperatures between 800 and 880 C. The catalyst was mechanically and catalytically stable, but its fluidizability was limited; agglomeration and channeling occurred. The highest C{sub 2+} yield amounted to 18.0% (X{sub CH{sub 4}} = 36.5%, S{sub C{sub 2+}} = 49.4%) and 17.2% (X{sub CH{sub 4}} = 36.6%, S{sub C{sub 2+}} = 46.9%) for the diluted and undiluted feed, respectively. These yields are among the highest ones reported in the open literature for oxidative coupling of methane in fluidized beds. In the whole investigated temperature range higher selectivities and yields were obtained upon reducing partial pressures of methane and oxygen but keeping their ratio constant (p{sub CH{sub 4}}/p{sub O{sub 2}} = 2.5). An increased gas velocity or bed height resulted in a drop of C{sub 2+} selectivity.

• OSTI ID: 183024
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 1 Vol. 35; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
10 SYNTHETIC FUELS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTORS
ETHYLENE
FLUIDIZED BEDS
LANTHANUM
METHANE
NATURAL GAS
OXIDATION
STRONTIUM
SYNTHESIS
ZIRCONIUM