Preparation method of titanium oxide loaded cobalt-based Fischer-Tropsch synthesis catalyst and cobalt-based Fischer-Tropsch synthesis catalyst

Abstract

The invention relates to the field of Fischer-Tropsch synthesis cobalt-based catalysts, and discloses a preparation method of a titanium oxide loaded cobalt-based Fischer-Tropsch synthesis catalyst and the cobalt-based Fischer-Tropsch synthesis catalyst. The method comprises the following steps: (1) mixing and contacting an aqueous solution containing a titanium source with an aqueous solution containing a precipitant, and then carrying out hydrothermal reaction to obtain slurry containing a titanium oxide precursor; (2) filtering and washing the slurry, mixing the slurry with a first cobalt source and water, and carrying out spray drying and first roasting treatment on the obtained first mixture to obtain a second mixture containing titanium oxide and cobalt oxide; (3) loading a second cobalt source on the second mixture, and then carrying out molding, drying and second roasting treatment to obtain the titanium oxide loaded cobalt-based Fischer-Tropsch synthesis catalyst. The cobalt-based Fischer-Tropsch synthesis catalyst prepared by the method has low methane selectivity, high stability and high catalytic activity, and is particularly suitable for being applied to a fixed bed reactor.

Description

technical field [0001] The invention relates to the field of Fischer-Tropsch synthesis cobalt-based catalysts, in particular to a preparation method of a titania-supported cobalt-based Fischer-Tropsch synthesis catalyst and the cobalt-based Fischer-Tropsch synthesis catalyst. Background technique [0002] The Fischer-Tropsch synthesis reaction is the process of converting synthesis gas into hydrocarbons through a catalyst. The reaction equation is as follows: [0003] nCO+(2n+1)H 2 →C n H2 n +2+nH 2 o [0004] Fischer-Tropsch synthesis is the core of indirect coal-to-liquids and natural gas-to-liquids technologies, and the performance of Fischer-Tropsch catalysts directly determines the economics and competitiveness of the entire indirect coal-to-liquids and natural gas-to-liquids technologies. Commonly used Fischer-Tropsch synthesis catalysts are iron-based and cobalt-based. Compared with iron-based catalysts, cobalt-based catalysts have high Fischer-Tropsch synthesis ...

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Problems solved by technology

[0012] The purpose of the present invention is to provide a titanium oxide-supported cobalt-based Fischer-Tropsch synthesis reaction in order to overcome the problems of poor hydrothermal resistance and high methane selectivity of the catalyst in the Fischer-Tropsch synthesis reaction in the prior art, as well as the defect that the catalyst is easy to lose activity. A preparation method of a Tropsch synthesis catalyst and a cobalt-based Fischer-Tropsch synthesis catalyst, the cobalt-based Fischer-Tropsch synthesis catalyst prepared by the method has low methane selectivity and high stability and is suitable for fixed-bed reactors

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