Preparation of Metal Oxide‐based Oxygen Carriers Supported with CeO₂ and γ‐Al₂O₃ for Chemical Looping Combustion

Abstract

The development of efficient oxygen carriers (OCs) in chemical looping combustion (CLC) exhibited tremendous achievement considering inherent CO2 capture. The selectivity of CO2 in the CLC process depends on the performance of employed OCs during multiple redox cycles. Different types of OCs were prepared, including 5wt%Ni/5wt%Ce/γ‐Al2O3, 5wt%La/5wt%Ce/γ‐Al2O3, and 5wt%Pr/5wt%Ce/γ‐Al2O3, using the wet impregnation method and characterized by scanning electron microscopy/energy‐dispersive X‐ray spectroscopy, temperature‐programmed reduction, and thermogravimetric analysis (TGA). The redox reactivity of OCs was investigated through TGA and tubular furnace reactor. The as‐prepared OCs revealed higher thermal stability along with excellent oxygen capacity. Pr/Ce/γ‐Al2O3‐based OCs showed moderate oxygen capacity, which may increase by the addition of active metals.

Ceria-based oxide catalysts supported on metal–organic frameworks: selective oxidation of toluene to CO2 and the doped metal-activity relationship

“…[15][16][17] Nevertheless, supported noble metal catalysts are expensive, whereas supported transition metal oxide-based catalysts perform considerably better at low temperatures. 11,18,19 As a result, supported transition metal-based catalysts (e.g., ceriabased oxides) are regarded as promising candidates for VOC elimination. [20][21][22][23] The superiority of ceria-based catalysts can be ascribed to three main aspects.…”

A Comparative Study of Eggshell and Commercial Sorbent-Based Catalysts through Synthesis and Characterization for SESR Process

“…From an economic standpoint, noble metals are not favored [15]. Furthermore, as the reaction progresses, the activity of Ni-based catalysts reduces due to carbon deposition [24][25][26]. The addition of a suitable support, such as Al or Mg, increases the surface area of the catalyst and retarded carbon deposition [27,28].…”