(55h) CO2 Dissociation over Ni Supported on Doped Ceria Catalysts

CO₂ dissociation to CO is an interesting fundamental reaction that can be part of the chemical looping process which utilizes natural gas and CO₂/H₂O to generate synthesis gas with solar power. Based on previous research, Ni-CeZrO₂ synthesized via various methods, including the combustion methods using citric acid, is a promising material for CO₂/H₂O reforming of CH₄. This study focuses on using temperature programmed reduction followed by a pulse CO₂ dissociation reaction to characterize and evaluate the synthesized catalysts. The reduction characteristics and pulse reaction activity and stability of catalysts are summarized and compared. There are optimum Ni and Zr loadings for the activity, capacity, and stability of Ni-CeZrO₂ for CO₂ dissociation. Various pre-treatment methods, such as non-thermal plasma treatments, are studied to modify those catalysts for improved CO₂ dissociation.