III International Conference

PP-II-133samples are characterized by significantly lower methane selectivity (4-6 %), than that ofpreviously described analogs (10-20 %) [1-3]. Fractional and group composition of liquidhydrocarbons was nearly independent of cobalt precursor nature. SF alpha value was0.92-0.95 for all samples.Investigation of the influence of aluminum hydroxide structure in 20%Со/СоAl x O ycatalyst support on С 5+ hydrocarbons yield and selectivity showed, that the highest yield (127g/m 3 ) and selectivity (91%) was obtained with the support prepared from gibbsite.Corresponding values for boehmite (107 g/m 3 and 80 %) and bayerite (90 g/m 3 and 87 %)were lower. Methane selectivity changed in a row: gibbsite (4 %) < bayerite (7 %) < boehmite(10 %). All samples are characterized by high SF alpha value (0.89-0.93).Hence, the nature of cobalt precursor and aluminum hydroxide in 20%Co/СоAl x O ycatalyst influences both activity and selectivity of the catalyst in hydrocarbon synthesis fromСО and Н 2 . The highest С 5+ yield (127g/m 3 ) and selectivity (91 %) at lowest methaneselectivity (4%) were obtained for the catalyst the support of which was prepared fromgibbsite and cobalt basic carbonate. In addition, all СоAl x O y based samples are characterizedby high selectivity to target products and low methane formation. The results of this work arecovered by the RF patent №2279912.References1. Hoang Cheng Yiem, Krylova A.Y., Salehuddin S.M., Lapidus A.L. //Russian Chem. Bull., Ser.Chem., № 6, p. 1247-1254, 1984.2. ЕР 1239019А1, 2002.3. US0132833A1, 2004.408