Iron-based catalyst and preparation method thereof

Abstract

The invention discloses an iron-based catalyst and a preparation method thereof. The iron-based catalyst comprises a compound FeOOH containing a first active ingredient Fe, a compound containing a second active ingredient, and a compound containing a structure promoter ingredient, wherein the second active ingredient comprises one or more elements selected from nickel, molybdenum, cobalt and tungsten; the structure promoter ingredient comprises one or more elements selected from silicon, aluminum and zirconium. Based on the compound FeOOH containing the first active ingredient Fe, the compound containing a second active ingredient comprising one or more elements selected from nickel, molybdenum, cobalt and tungsten and the compound containing the structure promoter ingredient comprising one or more elements selected from silicon, aluminum and zirconium are added to compound Fe, the second active ingredient and the structure promoter so as to achieve the synergistic effect, so that the catalytic activity of the iron-based catalyst is improved, the agglomeration phenomenon of catalysts is overcome, the catalyst dose during the coal liquefaction process is reduced, and the coal conversion rate and the oil production rate are increased.

Description

technical field [0001] The invention relates to the field of coal-to-liquids, in particular to an iron-based catalyst and a preparation method thereof. Background technique [0002] my country is in short supply of petroleum resources, but relatively rich in coal resources. Vigorously developing coal-to-liquids and coal chemical industry is one of the effective means to make up for the shortage of petroleum resources. Coal direct liquefaction is a clean coal technology that converts coal into liquid products by allowing hydrogen to enter the molecular structure of coal and its derivatives under high temperature and high pressure with the help of hydrogen-donating solvents and catalysts. Catalyst plays an important role in the direct coal liquefaction reaction. In the direct coal liquefaction reaction, the catalyst can effectively promote the pyrolysis and hydrogenation of coal, and improve the yield and quality of oil produced. [0003] Iron-based catalysts are cheap and ca...

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Problems solved by technology

The catalyst of the invention has the characteristics of high dispersion, good oil solubility, and high catalytic activity; Taniguchi et al. prepared ultrafine ferrous sulfide catalysts using carbonyl iron complexes as raw materials; Dadyburjor et al. prepared ultrafine iron Sulfur catalyst; Chadha et al. used high-temperature pyrolysis of disproportionated iron sulfide to prepare ultrafine iron sulfide catalysts with different stoichiometric ratios; the ultrafine iron-based catalysts prepared by the above methods have high coal liquefaction activity, but either raw materials The cost is too high, or the preparation process or the equipment used are complicated, which is not conducive to cost saving and large-scale development and application

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