IRON-BASED FISHCER-TROPSCH CATALYST WITH HIGH CATALYTIC ACTIVITY AND OLEFIN SELECTIVITY, PREPARATION METHOD THEREOF, AND METHOD FOR PREPARING HEAVY OLEFIN USING THE SAME

摘要

PURPOSE: An iron-based Fischer-tropsch catalyst with high catalytic activity and olefin selectivity, a preparation method thereof, and a reparation method of light olefin using syngas using the catalyst are provided to increase the life stability of the catalyst by reducing the occurrence of catalyst cracking phenomenon. CONSTITUTION: An iron-based catalyst for a Fischer-tropsch reaction includes potassium, iron, copper, manganese, and aluminum or silicon at the molar ratio of 1 to 6:100:1 to 6:1 to 20:5 to 40. The preparation method of the catalyst includes the following: acidic or neutral precursor compounds of the metals are dissolved in distilled water to prepare an acidic catalytic precursor solution; a basic precipitate is dissolved in distilled water to prepare a basic precipitating solution; the acid catalytic precursor solution is mixed with the basic precipitating solution, and the mixture is co-precipitated to obtain catalytic precursor slurry; the catalytic precursor slurry is aged to obtain a catalytic precursor precipitate; the precipitate is treated to obtain catalytic oxide; and a potassium compound aqueous solution is carried in the catalytic oxide, and the resultant product is dried and plasticized.