Study of attrition of Fe-based catalyst supported over spent FCC catalysts and their Fischer–Tropsch activity in a fixed bed reactor

Commercial spent fluid catalytic cracking (FCC) catalysts provided by Engelhard and Albemarle were used as supports for Fe-based catalysts with the goal of improving the attrition resistance of typical F–T catalysts. Catalysts with the Ruhrchemie composition (100Fe/5Cu/4.2K/25 spent FCC on mass basis) were prepared by wet impregnation. XRD and XANES analysis showed the presence of Fe2O3 in calcined catalysts. FexC and Fe3O4 were present in the activated catalysts. The metal composition of the catalysts was analyzed by ICP-MS. F–T activity of the catalysts activated in situ in CO at the same conditions as used prior to the attrition tests was measured using a fixed bed reactor at T = 573 K, P = 1.38 MPa and H2:CO ratio of 0.67. Cu and K promoted Fe supported over Engelhard-spent FCC catalyst shows relatively high attrition resistance, CO conversion (81%) and C5+ hydrocarbons selectivity (18.3%).

Commercial spent FCC materials were used as supports to synthesize Fe-based F–T catalysts with Ruhrchemie composition. The spent FCC supported catalysts show good resistance towards attrition. The F–T activity of the catalysts was studied in a fixed bed reactor at 573 K, 1.38 MPa and H2/CO = 0.67 and the results suggest that these catalysts are active in F–T synthesis.Figure optionsDownload high-quality image (128 K)Download as PowerPoint slide