Abstract
Silica nanotubes (SNTs) were synthesized with carbon nanotubes (CNTs) as the template and used as the support to prepare ruthenium-based catalyst by slurry impregnation method. The catalyst was characterized by N 2 physisorption, XRD, H 2-TPR and TEM; its performance in Fischer-Tropsch synthesis (FTS) was evaluated in a fixed-bed reactor at 503 K and 1.0 MPa and compared with that of SiO 2-supported ruthenium catalyst (Ru/SiO 2). The results indicated that ruthenium oxides can be completely reduced at 623 K by H 2. For the SNT-supported ruthenium catalyst (Ru/SNT), the ruthenium particles are mainly located inside the nanotubes and are still well dispersed on SNTs after H 2 reduction. Compared with Ru/SiO 2, the Ru/SNT catalyst exhibits higher activity in FTS because of the higher dispersion of ruthenium particles in SNTs.
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