CREATION OF THE DEVELOPED SURFACE OF MESH METAL CARRIERS MADE OF STAINLESS STEEL

Metal-based catalysts are widely used in manufacturing sector and ecology. Porous ceramic or oxide base with active metals applied on it by various methods is usually used as the catalysts carrier. The main disadvantage of the existing technology is poor adhesion of metal and the base, low mechanical toughness, poor heat transfer and the contact of the catalyst with gas. Recently, the catalysts on the base of nonprecious metals and their oxides, applied and fixed on the carrier in the form of mesh (for example, made of stainless steel) are considered to be advanced catalysts. They are stronger; they have high thermal conductivity, are easily regenerated, and assure good contact of gas and catalyst. However, metal carriers in the form of meshes have small specific surface area relative to the porous ceramics, so it is necessary to develop the methods of extension of          specific surface area of the metal base of catalysts. 

The authors propose a method of extension of specific surface area of the metal mesh – the carrier made of stainless steel for creation all-metal catalysts. This method showed that under different annealing conditions we can obtain developed surface of mesh – the carrier in the form of nano-whisker structures or micropores connected by channels; and form specific surface phase composition including producing of ferric oxide.

The catalysts with developed surface of ferric oxide can be used for production of ammonia, for dehydrogenation of olefinic, alkylpyridine and alkylaromatic hydrocarbons, etc.