Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2018-01-01

Journal: International Journal of Plasma Environmental Science and Technology

Included Journals: Scopus

Volume: 11

Issue: 2

Page Number: 144-149

ISSN: 18818692

Abstract: CO2 hydrogenation was conducted with H2 in a plasma-catalyst hybrid system, in which non-thermal plasma generated by dielectric barrier discharge was coupled with supported metal catalysts. Various SiO2-supported transition metals, including Co, Ni, Cu, Mo, and W, were tested as the catalysts for CO2 hydrogenation in the plasma. Among the transition metals mentioned above, Co/SiO2 exhibited the highest activity, and the major product was CH4. In addition, SiO2, Al2O3, TiO2, MgO and mesoporous MCM-41 were used to support Co species, and the effect of catalyst support on the catalytic performance was investigated. The activities of Co/SiO2, Co/MCM-41, and Co/MgO were comparable and they were much higher than that of Co/Al2O3, whereas Co/TiO2 hardly exhibited catalytic activity. The stability of Co/SiO2 catalyst was evaluated at high GHSV in a 200 h test run, and the spent catalysts were characterized by XRD measurement and SEM observation. ? 2018, Institute of Electrostatics.