High-specific-surface-area Fischer-Tropsch synthesis catalyst and preparation method and application of high-specific-surface-area Fischer-Tropsch synthesis catalyst

Abstract

The invention provides a high-specific-surface-area Fischer-Tropsch synthesis catalyst and a preparation method and application of the high-specific-surface-area Fischer-Tropsch synthesis catalyst. Organisms with different types and contents are added into different stages of catalyst preparation by a traditional coprecipitation method, for example, micromolecule organisms are added in the precipitation process so as to inhibit the aggregation of particles in the precipitation process, so that the dispersion degree of the whole system is improved; macromolecule organisms are introduced into a filter cake so as to inhibit the clustering of particles in the thermal treatment process, and can play a role of pore forming when being removed in a baking process; meanwhile, with the combination of the use of a high-thermal-stability additive, the contraction and collapse of a framework of the catalyst in the thermal treatment process can be prevented effectively; the method can be used for obviously improving the specific surface area of the Fischer-Tropsch synthesis ferrous catalyst, so that the activity of the catalyst can be improved greatly.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a high specific surface area Fischer-Tropsch synthesis catalyst and its preparation method and application. Background technique [0002] The Fischer-Tropsch synthesis reaction refers to the process of converting the synthesis gas obtained from the gasification of carbon-containing resources such as coal, natural gas, and biomass into hydrocarbons and chemicals. Due to the depletion of petroleum resources, Fischer-Tropsch synthesis technology has received more and more attention in recent years. Catalysts commonly used in the Fischer-Tropsch synthesis process include Fe, Co, Ru, etc. Among them, Ru is not suitable for industrial applications due to its high price. Fe and Co are the only two types of Fischer-Tropsch synthesis catalysts suitable for industrialization. [0003] Most of the existing Fischer-Tropsch synthesis iron catalysts are prepared by ...

AI Technical Summary

Problems solved by technology

The surface area of ​​the catalyst prepared by the precipitation method is generally difficult to exceed 200m 2 / g, which greatly limits the improvement of catalyst activity

This is because during the precipitation reaction, due to the inevitable direct contact between the particles, the particles are irreversibly stuck together and aggregated, thereby reducing the disorder of the entire system and finally reducing the surface area of ​​the catalyst.

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