Preparation method of directly-formed metal element-modified cobalt carbide material

Abstract

The invention discloses a preparation method of a directly-formed metal element-modified cobalt carbide material. Sodium alginate powder is used for preparing a homogeneous-phase aqueous solution A with a concentration of 14-60wt%; soluble modified metal salt and soluble cobalt salt are used for preparing an aqueous solution B with a concentration of 10-80wt%; according to a ratio of sodium alginate to the cobalt salt of 0.2 to 18, the aqueous solution A is added into the solution B, which is stirred, dropwise to obtain spherical colloid; the obtained spherical colloid is filtered and dried toobtain dry spheres; in an anaerobic atmosphere, calcination is conducted to obtain the formed metal element-modified cobalt carbide material. The preparation method of the directly-formed metal element-modified cobalt carbide material has the advantages that the method is simple, and the cost is low.

Description

technical field [0001] The invention belongs to nanometer material preparation technology, in particular to a preparation method of directly formed metal element modified cobalt carbide material. Background technique [0002] Cobalt carbide materials modified by metal elements are widely used in the field of synthesis gas conversion. At present, the preparation of existing metal element-modified cobalt carbide materials often adopts impregnation method or co-precipitation method, but the modified Cobalt carbide materials have the disadvantages of uneven distribution of metal elements, easy agglomeration and phase separation during the reaction process. In addition, the process of forming cobalt carbide often requires carbonizing agents such as methane and carbon monoxide, and the cobalt carbide material after synthesis needs to be added with adhesives to carry out the molding process, which increases the economic cost of synthetic materials, and the adhesive used for molding...

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Problems solved by technology

[0002] Cobalt carbide materials modified by metal elements are widely used in the field of synthesis gas conversion. At present, the preparation of existing metal element-modified cobalt carbide materials often adopts impregnation method or coprecipitation method, but the modified Cobalt carbide materials have the disadvantages of uneven distribution of metal elements, easy agglomeration and phase separation during the reaction process

In addition, the process of forming cobalt carbide often requires carbonizing agents such as methane and carbon monoxide, and the cobalt carbide material after synthesis needs to be added with adhesives to carry out the molding process, which increases the economic cost of the synthetic material, and the adhesive used for molding is also expensive. The physical and chemical properties of materials often have uncertain effects, which restricts the application of materials

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