Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia

PP-44EFFECT OF REDUCTION CONDITIONS OF 20%Co/(Hβ +50%Al)CATALYST ON THE CATALYST PROPERTIES IN HYDROCARBONSYNTHESIS FROM CO AND H 2Potapova S.N., Mikhailova Ya.V., Svidersky S.A., Loginova A.N.United research and development centre, Russia, Moscow, Leninsky pr. 55/1, b.2.research-centre@yrd.ruSearch for new ways to use associated and natural gas is of great importance infuel sources utilization. One of promising methods for large-scale processes isproduction of synthetic liquid hydrocarbons via Fischer-Tropsch synthesis over cobaltcatalysts. In the presence of these catalytic systems, normal paraffins are mainlyformed with yield and composition depending not only on composition of a catalystbut also on the conditions of its activation before the synthesis. Formation of activesurface of cobalt catalyst is known to occur during its reduction with hydrogen.Reduction conditions have an impact on the ratio between metallic and oxide phaseswhich, in its turn, determines catalytic properties of a system, particularly selectivityto C 5+ hydrocarbons and methane. Large amount of hydrogen is required to reduce(activate) commercial Fischer-Tropsch catalysts. Consumption of hydrogen can belowered by its dilution with inert gases (helium, nitrogen, argon) to provide H 2 contentfrom 5 to 100 vol.%. However, there is a limited number of studies considering themethod.The aim of our study was to investigate the influence of 20%Со/(Нβ+50%Al)catalyst reduction conditions, particularly hydrogen dilution with nitrogen and helium,on its properties in hydrocarbon synthesis from CO and H 2 .20%Со/(Нβ+50%Al) catalyst has been prepared by the technique described inpatent [1]. Hydrocarbon synthesis from CO and H 2 was performed in a flow unit withfixed-bed catalyst at P=2.0 MPa and syngas space velocity of 1000 hr –1 . Thecatalysts were activated either with pure hydrogen or with reducing mixtures(10%Н 2 +N 2 ) or (10%Н 2 +Нe) at 400°C. In all the cases the total amount of purehydrogen passed was 7.5 l.All the catalysts were active in hydrocarbon synthesis from CO and H 2 .Over the whole temperature range of the synthesis the largest CO conversionand liquid hydrocarbon yield were achieved over the sample reduced with pure133