Ruthenium nanoparticles encapsulated inside porous hollow carbon spheres: A novel catalyst for Fischer-Tropsch synthesis
作者： Tumelo N. Phaahlamohlaka , David O. Kumi , Mbongiseni W. Dlamini , Linda L. Jewell , Neil J. Coville
DOI: 10.1016/J.CATTOD.2015.11.034
关键词:
摘要: Two novel Ru Fischer–Tropsch (FT) catalysts were made that supported on the inside of two hollow carbon spheres differed in terms their shell porosity. Mesoporous Stober and deposited silica. The Ru/silica encapsulated with by CVD (toluene) or from resorcinol/formaldehyde. Removal silica gave Ru@HCS (dRu = 5.5) Ru@MHCS (3.2 nm) had shells (d ca. 20 different physicochemical properties as evidenced TEM, nitrogen adsorption-desorption, TGA, Raman spectroscopy XRD measurements. FT studies performed (10 bar; 190/220/250 °C; 2/1 ratio H2/CO). Classical data was obtained indicating could access reactants products escape (acting a nanoreactor). Activity indicated diffusion control CO/H2 into nanoreactor selectivity an alpha value 0.74–0.78 (220 °C). Typical product associated small particles observed methane content increased reaction temperature. No substantial sintering occurred below 220 °C. It is thus seen porosity architectures suitable for polymerization reaction.
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