CaO-ZnO catalyst for selective conversion of methane to C{sub 2} hydrocarbons using carbon dioxide as the oxidant

Journal Article · Mon May 15 04:00:00 EDT 2000 · Journal of Catalysis

DOI:https://doi.org/10.1006/jcat.2000.2820· OSTI ID:20076107

Wang, Ye; Ohtsuka, Yasuo

A binary catalyst of CaO-ZnO is effective for the selective conversion of CH{sub 4} to C{sub 2} hydrocarbons using CO{sub 2} as the oxidant. C{sub 2} selectivity approaches 80% with a C{sub 2} yield of 4.3% over the catalyst with a Ca/Zn ratio of 0.5 at 875 C. The lattice oxygen of the CaO-ZnO converts CH{sub 4} mainly to H{sub 2} and CO. The presence of CO{sub 2} forms a new oxygen species, which is active and selective for the conversion of CH{sub 4} to C{sub 2} hydrocarbons. The CaO component in the catalyst enhances the adsorption of CO{sub 2} and thus suppresses the reaction involving the lattice oxygen. The reduced Zn site is suggested to activate CO{sub 2}.

• Research Organization: Tohoku Univ., Sendai (JP)
• OSTI ID: 20076107
• Journal Information: Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 1 Vol. 192; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
10 SYNTHETIC FUELS
CALCIUM OXIDES
CARBON DIOXIDE
CATALYTIC EFFECTS
CHEMICAL REACTION YIELD
ETHANE
ETHYLENE
METHANE
REFORMER PROCESSES
ZINC OXIDES