Development and Regeneration Performance of LaNiO3 Perovskite Oxides for Dry Reforming of Methane

Dry reforming of methane (DRM) process has attracted much attention in recent years for the direct conversion of CH4 and CO2 into high-value-added syngas. The key for DRM was to develop catalysts with high activity and stability. In this study, LaNiO3 was prepared by the sol-gel, co-precipitation, and hydro-thermal methods to explore the influence of preparation methods on the catalyst structure and DRM reaction performance. The regeneration properties of the used LaNiO3 catalysts were also investigated under steam, CO2, and air atmospheres, respectively. The results showed that LaNiO3 prepared by sol-gel method showed the best DRM performance at 750 & DEG;C. The DRM performance of the samples prepared by hydro-thermal method was inhibited at 750 & DEG;C due to the residual of Na+ ions during the preparation process. The regeneration tests showed that none of the three atmospheres could restore LaNiO3 perovskite phase in the samples, but they could eliminate the carbon deposits in the samples during the DRM reaction, so the samples could maintain stable DRM performance at different cycling stages.

Automated summary

This study investigates the influence of different preparation methods on the catalyst structure and DRM reaction performance by preparing LaNiO3 catalysts through sol-gel, co-precipitation, and hydro-thermal methods. It is found that LaNiO3 prepared by the sol-gel method shows the best DRM performance at 750°C, while the samples prepared by the hydro-thermal method are inhibited at 750°C due to the residual Na+ ions. The regeneration tests show that none of the three atmospheres can restore the LaNiO3 perovskite phase, but they can eliminate carbon deposits in the samples, maintaining stable DRM performance at different cycling stages.