Ni–Fe Catalysts Based on Perovskite-type Oxides for Dry Reforming of Methane to Syngas

Abstract

LaNi (1)x) Fe x O 3 (x=0, 0.2, 0.4 and 0.7) perovskite-type catalysts were modified by the partial substitution of nickel by iron, aiming to increase the stability and resistance to carbon deposition during the methane dry reforming reaction. The results showed that a suitable combination of precipitation and calcination steps could result in oxides with the desired structure and with improved properties from the point of view of heterogeneous catalysis. The partial substitution of Ni by Fe in the perovskite structure resulted in decreasing rates of conversion of both reactants. However, the stability of the catalyst during the reaction was highly increased. These substituted catalysts were shown to be stable and the LaNi 0.8 Fe 0.2 O 3 catalyst, calcined at 800°C for 5 h, was the most active in the reaction conditions.

Effect of Fe and Mn Substitution in LaNiO3 on Exsolution, Activity, and Stability for Methane Dry Reforming

“…In case of reduced LaNi0.8Fe0.2O3 catalyst; however, the H2:CO product ratio was close to 0.5, which was a consequence of the RWGS reaction over DRM reaction at 650 °C. This is explained due to the fact that the presence of Fe in the Ni metal particles favored the RWGS reaction [43], whereas exsolution from LaNi0.8Mn0.2O3 produced only pure Ni nanoparticles.…”

Perovskite LaxM1−xNi0.8Fe0.2O3 catalyst for steam reforming of toluene: Crucial role of alkaline earth metal at low steam condition

“…The presence of this peak indicates the interaction between Ni and Fe to form bimetallic particles which is also in agreement with the XRD result. Literature studies have concluded that for catalysts that contain Ni, Fe and La, a fraction of the Fe undergoes reduction with the aid of Ni and Ni-Fe bimetallic particles are formed after the reduction process [44][45][46][47][48][49].…”

Mixtures of Steel-Making Slag and Carbons as Catalyst for Microwave-Assisted Dry Reforming of CH4

“…However, substitution of Ni by low contents of Fe (i.e. Ni-Fe catalysts) promotes more stable catalysts [4].…”