θ-IRON-METAL CARBIDE COMPOSITES, THEIR MANUFACTURING METHODS, AND THEIR USES

Abstract

The present invention relates to a metal θ-iron-carbide composite, a method of preparation thereof, and its use. The method comprises: S1, subjecting a precursor to a reduction and surface purification treatment at 300-500°C in the presence of hydrogen to obtain an intermediate product; and S2, subjecting the intermediate product to a carbide preparation treatment at 300-470°C in a mixed gas atmosphere. The metal θ-iron-carbide composite according to one embodiment of the present invention is used as a catalyst for a synthesis gas conversion reaction, so that the reaction has a very low overall CO2 selectivity.