Phosphorus Modified Co/Al₂O₃Fischer-Tropsch Catalyst for a Slurry Phase CSTR with Enhanced Hydrothermal and Mechanical Stability

Effects of phosphorus and saccharide on size, shape, and reducibility of Fischer–Tropsch catalysts for slurry phase and fixed-bed reactions

“…According to Riad [28], the band at 1971 cm −1 is an indication of the vibrational structural modes of boehmite, and the band at around 914 cm −1 is due to a vibrational mode localized in the surface layer of boehmite and most likely involving deformation of surface hydroxyl group. The spectra of all the P-modified catalysts exhibited bands due to the P O stretching vibration of the PO 4 3− tetrahedra near 1100-1170 cm −1 , indicating the generation of an AlPO 4 phase on the surface [10,[29][30][31]. However, it should be noted that the bands of P(0) at around 914-1117 cm −1 were not confused with the triply degenerate P O stretching vibration band since the shape of peak looked different from those of the others.…”