PERFORMANCE OF Mn-MODIFIED Ni/K/MoS_2 CATALYSTS FOR HIGHER ALCOHOL SYNTHESIS

Mn/Ni/K/MoS2 catalysts prepared by different methods and their performances for higher alcohols synthesis from syngas were tested under different reaction conditions The C+2 alcohols content, the selectivity and spacetimeyield of alcohols obviously increased when the catalyst with Mn content of only 026% was prepared by coprecipitation using (NH4)2MoS4, Mn(AC)2·4H2O and Ni(AC)2·4H2O as the precursors As the content of Mn in Mn/Ni/K/MoS2 catalyst prepared by successive precipitation increased to 066%, the spacetimeyield was improved remarkably The effect of Mn content on catalytic performance was then investigated over Mn/Ni/K/MoS2 catalysts prepared by impregnation method The results showed that the selectivity and spacetimeyield of alcohols reached the maximum, ie 696% and 0338?g/mL·h at the reaction conditions of 315?℃, 95?MPa and 6?000?h-1 when the Mn/Mo (molar ratio) was 15 Furthermore, the stability test for 300?h over Mn/Ni/K/MoS2 catalyst prepared by coprecipitation showed that the catalyst had a good stability