High-abrasion resistance lithium-containing iron series Fischer-Tropsch synthetic catalyst, catalyst bonding agent containing blending silica sol and preparation method and application thereof

Abstract

The invention provides a high-abrasion resistance lithium-containing iron series Fischer-Tropsch synthetic catalyst and a preparation method thereof. The catalyst comprises the following elements of: Fe, Cu, K, Li and SiO2 in a weight ratio of 100:(1.5-15):(1.5-15):(0.1-8):(10-60). The invention also provides a catalyst bonding agent for preparing the Fischer-Tropsch synthetic catalyst and a preparation method thereof and application of the catalyst bonding agent containing blending silica sol of lithium silicate and potassium silicate to the preparation of the high-abrasion resistance lithium-containing iron series Fischer-Tropsch synthetic catalyst. The catalyst bonding agent contains the blending silica sol of the lithium silicate and the potassium silicate, and lithium-ion and potassium-ion interactive arrangement chain sections are positioned on a polysilicate molecular chain. The lithium-containing iron series Fischer-Tropsch synthetic catalyst has high mechanical strength and hydrothermal stability and high Fischer-Tropsch synthetic activity, and is suitable to be used in a slurry reactor; and a preparation process is simple and is suitable for large-scale production.

Description

technical field [0001] The present invention relates to a Fischer-Tropsch synthesis catalyst and a preparation method thereof, more specifically, to a high-wear-resistant lithium-containing iron-based Fischer-Tropsch synthesis catalyst and a preparation method thereof, and a co-catalyst containing lithium silicate and potassium silicate Catalyst binder of mixed silica sol, its preparation method, and its application. Background technique [0002] In the 1920s, German scientists F.Fischer and H.Tropsch discovered the method of using synthesis gas to synthesize hydrocarbons or oxygenated compounds under the action of iron or cobalt catalysts. After that, people will use synthesis gas as raw material to produce various The process of hydrocarbons and oxygenated organic compounds is called Fischer-Tropsch (F-T) synthesis. In the 1950s, the South African SASOL company implemented large-scale industrial production of coal-based syngas as raw material and iron-based catalysts to s...

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Problems solved by technology

[0009] Due to the wear and tear of the catalyst during the reaction process, the best Fischer-Tropsch synthetic wax currently contains at least 5ppm of Fe element, and most of the Fischer-Tropsch synthetic wax contains more than ten to tens of ppm of Fe element. During the post-processing of hydrogen cracking, the content of Fe element in the raw wax is required to be less than 1ppm, so that the Fischer-Tropsch synthesis raw wax produced by the iron catalyst needs to be further demetalized and impurity treatment, which greatly increases the processing cost of the wax

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