Dry reforming of methane(DRM)process has attracted much attention in recent years for the direct conversion of CH_4 and CO_(2)into high-value-added syngas.The key for DRM was to develop catalysts with high activity an...Dry reforming of methane(DRM)process has attracted much attention in recent years for the direct conversion of CH_4 and CO_(2)into high-value-added syngas.The key for DRM was to develop catalysts with high activity and stability.In this study,LaNiO_(3)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 LaNiO_(3)catalysts were also investigated under steam,CO_(2),and air atmospheres,respectively.The results showed that LaNiO_(3)prepared by sol-gel method showed the best DRM performance at 750℃.The DRM performance of the samples prepared by hydro-thermal method was inhibited at 750℃due to the residual of Na^(+)ions during the preparation process.The regeneration tests showed that none of the three atmospheres could restore LaNiO_(3)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.展开更多
基金financially supported by the funding from the National Natural Science Foundation of China(52176109)。
文摘Dry reforming of methane(DRM)process has attracted much attention in recent years for the direct conversion of CH_4 and CO_(2)into high-value-added syngas.The key for DRM was to develop catalysts with high activity and stability.In this study,LaNiO_(3)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 LaNiO_(3)catalysts were also investigated under steam,CO_(2),and air atmospheres,respectively.The results showed that LaNiO_(3)prepared by sol-gel method showed the best DRM performance at 750℃.The DRM performance of the samples prepared by hydro-thermal method was inhibited at 750℃due to the residual of Na^(+)ions during the preparation process.The regeneration tests showed that none of the three atmospheres could restore LaNiO_(3)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.
