Supported Perovskite for Dry Reforming of Methane

Many methods were developed for the synthesis of perovskites materials with the target to obtain pure phase and also to increase the specific surface area. However the conventional methods used such as spray pyrolysis, freeze-drying, sol-gel.. . requiring high calcination temperature to generate the perovskite phase ( 700 °C), lead to solid with specific surfece area below lOm /g. 

Dacquin et al. [51] used a method called in situ crystallization in a confined space to prepare a LaNiOs/SBAlO catalyst. As evidenced by TEM analysis, very small nanoparticles of perovskite were generated within the silica porosity with a size between 2 and 5 nm and an average closed to 3 nm. The reduction step performed at 700 °C gives Ni° particles well dispersed within the matrix porosity and their size remained close to the support pore size. The catalytic activity for syngas production was doubled compared to bulk LaNiOs precursor, it remains 

Stable during 48 h on stream whereas carbon deposition was observed. However, Ni° particles dispersed within the channels of SBAIO resist to sintering, carbon accumulation proceeds only on few isolated external nickel particles but does not alter the catalytic activity. 

Kiousis, V., Nalbandian, L., and Yentelakis, I.V. (2006) Catalytic and electrocatalytic behaviour of Ni-based cermet anodes under internal dry reforming of CH, + CO2 mbctures in SOFCs. Solid State Ionics, 177, 

and Lu, G.Q. (19%) Carbon dioxide reforming of methane to produce synthesis gas over metal-supported catalysts state of the art. Energy Fuels, 10, 8% 904. 

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