EXTRUDED SCR-FILTER Russian patent published in 2016 - IPC B01D53/94 

FIELD: gas industry.

SUBSTANCE: invention relates to gas cleaning. Proposed a filter with flows passing through walls, containing catalyst for conversion of nitrogen oxides in the presence of reducing agent. Filter comprises extruded solid mass containing: 10-95 % of mass, at least, of one component of a binding substance/matrix; 5-90 % of mass of zeolite molecular sieve, not zeolite molecular sieve or a mixture of any two or more of them and 0-80 % of mass of optionally stabilized cerium oxide. Catalyst contains at least one metal, where: (i) at least one metal is present in the extruded solid mass, and also is present at a higher concentration on the surface of the extruded solid mass; (ii) at least one metal is present in the extruded solid mass, and also, it is applied in the form of one or several layers of coating on surface of the extruded solid mass, or (iii) at least one metal is present in the extruded solid mass, is present at a higher concentration on the surface of the extruded solid mass, as well as it is applied in the form of one or several layers of coating on surface of the extruded solid mass.

EFFECT: use of proposed filter increases efficiency of cleaning exhaust gases.

43 cl, 2 dwg, 2 tbl, 4 ex