1. Role of active metals Cu, Co, and Ni on ceria towards CO2 thermo-catalytic hydrogenation.
- Author
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Bali, Henrik, Mutyala, Suresh, Efremova, Anastasiia, Xie, Shaohua, Collier, Samantha, Marietta, Ábel, Sápi, András, Liu, Fudong, Kukovecz, Ákos, and Kónya, Zoltán
- Abstract
A series of CeO
2 supported Cu, Co, and Ni catalysts have been synthesized by the wet-impregnation method for CO2 thermo-catalytic hydrogenation from 200 to 400 °C in the fixed bed reactor. All catalysts were characterized by XRD, N2 -isotherms, and H2 temperature-programmed reduction. XRD results have suggested that the incorporated Cu, Co, and Ni have uniformly distributed on the CeO2 surface, N2 -isotherm analysis confirmed that the pores of CeO2 were blocked by incorporated metals and H2 -TPR indicated strong interaction between active metal and CeO2 . The CO2 consumption rate and product selectivity depend on the type of active metal on CeO2 and reaction temperature. The order of CO2 consumption rate for 5 wt.% catalysts was 5Ni/CeO2 > 5Co/CeO2 > 5Cu/CeO2 at 400 °C. The high CO2 consumption rate for 5Ni/CeO2 was attributed to the presence of more number of active metallic Ni during the reaction which dissociated H2 molecule to H-atoms. The formed H-atoms reacted with active CO2 molecule and formed CH4 with 100% selectivity. [ABSTRACT FROM AUTHOR]- Published
- 2021
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