▎ 摘　　要

NOVELTY - Preparing low-carbon olefin catalyst using graphene loaded efficient iron-based Fischer-Tropsch synthesis comprises e.g. ultrasonically dispersing the oxidized graphite in distilled water, adding mixed aqueous solution of a precursor salt of iron and a precursor salt of magnesium to the above suspension, adding 2-20 ml hydrazine hydrate solution and dispersing above obtained the filter cake in distilled water, then ultrasonic heating the system to obtain suspension and further modifying potassium precursor using impregnation method to obtain final product. USE - The method is useful for preparing low-carbon olefin catalyst (claimed). ADVANTAGE - The low-carbon olefin catalyst has ability to reduce carbon dioxide selectivity and improves activity and selectivity of low-carbon olefins and has high stability. DETAILED DESCRIPTION - Preparing low-carbon olefin catalyst using graphene loaded efficient iron-based Fischer-Tropsch synthesis comprises (i) ultrasonically dispersing the oxidized graphite in distilled water at 20-90 degrees C to prepare a suspension, (ii) adding mixed aqueous solution of a precursor salt of iron and a precursor salt of magnesium to the above suspension with vigorous stirring at 20-90 degrees C for 1-12 hours and then raising the temperature, (iii) when the temperature reaches to 50-100 degrees C, then adding 2-20 ml hydrazine hydrate solution, and then adjusting pH of the solution to 8-13 by using alkali solution, stirring for 24 hours, filtering, repeated washing to obtain the filter cake, and (iv) dispersing above obtained the filter cake in distilled water, then ultrasonic heating the system to obtain suspension and further modifying potassium precursor using impregnation method to obtain final product.