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|1. (WO2018040798) MONODISPERSED IRON-BASED CATALYST FOR FISCHER-TROPSCH PROCESS, PREPARATION METHOD THEREFOR AND USE THEREOF|
|Applicants:||WUHAN KAIDI ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., LTD.
|Title:||MONODISPERSED IRON-BASED CATALYST FOR FISCHER-TROPSCH PROCESS, PREPARATION METHOD THEREFOR AND USE THEREOF|
Disclose are a monodispersed iron-based catalyst for the Fischer-Tropsch process, a preparation method therefor and the use thereof. The catalyst comprises a carrier, i.e. silicon dioxide and an active component, i.e. iron. The carrier, i.e. silicon dioxide has a mesoporous spherical particle structure, and the carrier, i.e. silicon dioxide covers the active component, i.e. iron. The active component, i.e. iron is of a nanoparticle shape and is distributed uniformly. The particle size of the carrier, i.e. silicon dioxide particle is 140 - 160 nm. In the preparation method therefor, the pressure of CO2 is adjusted, so that the morphology of the catalyst is changed from a disc-shaped stack into a uniform spherical shape. The iron nanoparticles are thus covered in the interior of the spherical silicon dioxide, sintering of the iron nanoparticles is prevented, and the appearance of an ingredient which is difficult to reduce is also avoided. The iron-based catalyst can be applied to a process route for preparing an α-olefin, wherein the α-olefin is directly synthesized by using a synthetic gas as a raw material under the action of the iron-based catalyst. The iron-based catalyst has a high selectivity for a long chain α-olefin.