Iron-base catalyst for Fischer-Tropsch synthesis and its preparation method

Abstract

A Fe-based catalyst for the Fischer-Tropsch synthesis contains Re2O3, Fe3O4, La2O3, CuO, K2O and SiO2. It is prepared through using oxidant to oxidize partially the ferrous sulfate to obtain the mixed solution of iron sulfate and ferrous sulfate, mixing with the mixed solution of lanthanum nitrate and copper salt, fast depositing by alkaline compound, washing the deposited slurry, adding potassium silicate-water glass solution, and spray drying.

Description

Technical field

[0001] The invention belongs to a catalyst and a preparation method thereof, and specifically relates to an iron-based catalyst containing a lanthanum promoter for Fischer-Tropsch synthesis and a preparation method thereof. Background technique

[0002] Fischer-Tropsch synthesis is a synthesis gas (CO+H) discovered in the 1920s. 2 ) A method of synthesizing liquid fuels, and since the 1950s, large-scale industrialization of coal-based synthetic liquid fuels has been realized in South Africa (see Dry ME's paper published in Catalysis Today, 1990, 6(3), 183-206" The Fischer-Tropsch Process-Commercial Aspects”). Fischer-Tropsch synthesis usually uses iron-based catalysts. Syngas is reacted in fixed-bed, fluidized-bed or slurry-bed reactors equipped with iron-based catalysts to produce the required hydrocarbon products, including gasoline, diesel, and wax. , Naphtha, low-carbon olefins, etc. Syngas can be produced from carbon-containing raw materials such as coal, nat...