Preparation and application of a nitrogen-doped iron-based catalyst for Fischer-Tropsch reaction

Abstract

The invention discloses a one-step method for preparing an N-doped Fe-based carbon material catalyst, which is used in the reaction of Fischer-Tropsch synthesis of synthesis gas to prepare low-carbon olefins. The preparation method of the catalyst of the present invention is to mix the precursors of each component and then calcinate. On the one hand, the prepared catalyst has high catalytic activity and low-carbon olefin selectivity; on the other hand, it can effectively prevent the active phase from agglomerating and oxidizing during the reaction process to cause catalyst deactivation. The preparation method of the catalyst is simple and has good application prospects.

Description

Technical field [0001] The invention belongs to the technical field of synthesis gas conversion, and relates to an iron-based catalyst for directly preparing low-carbon olefins from a synthesis gas fund-based synthesis route, and preparation and application thereof. Background technique [0002] Low-carbon olefins including ethylene, propylene and butene are important chemical raw materials, which are mainly derived from the cracking of naphtha. With the reduction of crude oil resources and the increasingly prominent environmental problems, and the large-scale development of shale gas, the acquisition of olefins from the petroleum route is challenged and unsustainable. Therefore, the production of low-carbon olefins by non-petroleum routes has attracted more and more attention. The direct production of low-carbon olefins from synthesis gas, as an alternative technical route for the production of low-carbon olefins such as ethylene and propylene, is of great significance for util...

AI Technical Summary

Problems solved by technology

On the other hand, nitrogen as a unique dopant can affect the surface electronic structure of the Fe active phase, thereby affecting the olefin selectivity.

However, there are no relevant literature and patent reports on the use of catalysts prepared from the precursors of active phase, N dopant, carbon materials, etc.

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