Study of the perovskite-type catalysts 40LaNi0.75Fe0.25-X MXO3/SiO2 (M=Ce, Zr) for the dry reforming of methane

A series of perovskite-type oxide catalysts 40LaNi(0.75)Fe(0.25-x)M(x)O(3)/SiO2 (M=Ce, Zr) were synthesized by the citrate sol-gel method. The synthesized catalysts were characterized by various techniques such as BET, XRD, TEM, TGA, H-2-TPR, FTIR, and Raman spectroscopy. The synthesized catalysts used for the dry reforming of methane (DRM) reaction at temperature 1073 K to produce synthesis gas. The effect of ceria and zirconia promoters on the percent conversion of CH4, CO2, and yield of the product was tested. An optimum ratio of (Fe-Ce) and (Fe-Zr) showed the highest yield and the highest conversion. The study demonstrated that the ceria or zirconia dispersed the excess nickel oxide present in the perovskite catalysts, which increased the conversion (CH4 and CO2), the stability of the catalysts and suppressed the carbon deposition during DRM. The percent yield obtained highest with the catalyst 40LaNi(0.75)Fe(0.15)Ce(0.10)O(3)/SiO2 and the highest percent conversion with the catalyst 40LaNi(0.75)Fe(0.10)Zr(0.15)O(3)/SiO2. The carbon formation was absent up to the 6 h of time-on-stream study during the DRM reaction. The catalyst maintained its activity without any deactivation.

Automated summary

A series of perovskite-type oxide catalysts 40LaNi(0.75)Fe(0.25-x)M(x)O(3)/SiO2 (M=Ce, Zr) were synthesized by the citrate sol-gel method and used for dry reforming of methane (DRM) reaction. The ceria and zirconia promoters showed the highest yield and conversion of the product, reducing carbon deposition. The catalyst maintained its activity without deactivation during the DRM reaction for up to 6 hours.