Structured iron-based catalyst for producing -olefin from syngas, preparation method and use thereof

摘要

To provide a structured iron-based catalyst for producing -olefin from a synthesis gas, a method for preparing the same and a method of using the same.The catalyst contains the active ingredient iron, an additive and a carrier. The additive comprises a first additive which is a transition metal or a transition metal oxide and a second additive which is a metal oxide. The iron content of the active ingredient is 50.0% to 99.8%, the content of the first additive is 0 to 5.0%, the content of the second additive is 0 to 10%, the other Is the carrier silicon dioxide. The iron precursor of the active ingredient, the precursor of the first additive, and the silicon dioxide of the carrier are made into monodisperse particles using the thermal diffusion method, and then impregnated into the precursor solution of the second additive , A structured iron-based catalyst is obtained. The structured iron-based catalyst is used for producing -olefin from synthesis gas. The monodisperse structured iron-based catalyst has good selectivity because it forms an active center suitable for producing -olefin.(FIG.