Activity of Nickel Supported Over Nanorod-Shaped Strontium Hydroxyapatite Catalysts in Selective Methanation of CO & CO2

Abstract Nickel modified strontium hydroxyapatite (Ni/Sr-HAP) supported catalysts are studied in selective methanation of CO/CO 2 . In this work, a new type nano rod-shaped hydroxyapatite-based with two different sizes and aspect ratios were prepared by sol–gel method next step, Ni precursor was wet impregnated i.e., denoted as Ni/Sr-HAP Ni/Sr-HAP(F127). The catalytic tests performed CO reactions evaluated the light-off temperatures curves (225–450 °C) under ambient pressure fixed-bed flow reactor. physicochemical properties characterized XRD, N physisorption, TEM, SEM, TPR, /H -TPD H -chemisorption techniques. From XRD analysis, both Ni/Sr-HAP(F127) identified structure high crystallinity very low intensity peaks corresponds to phosphates main phase structure. TEM SEM micrographs displayed nano- rod shaped morphology dimensions exhibited average particle size ~ 9.2 nm. While shown length range 100–250 nm width 20–40 5.7 F127 mediated support Sr-HAP synthesis mesoporous catalyst possessed higher metal surface smaller particles adsorption capacity. medium strength basic sites played an important role reactions. Based on characterization activity results, small sized nanorods is most active due dispersion, amounts sites, reducibility character than bigger based catalyst.