CONVERSION OF NITRIC OXIDES AT PRESENCE OF A CATALYST DEPOSITED ON A GRID-TYPE STRUCTURE Russian patent published in 2005 - IPC

FIELD: chemical industry.

SUBSTANCE: the invention is pertaining to the fields of chemical industry, in particular to a method of conversion and an apparatus for conversion of at least one nitric oxide such as NO, NO₂ or N₂O, which covert an oxide in presence of the catalyst deposited on a metal grid-type structure. The grid-type structure preferably is filamentary and formed by metal or ceramic fibers. It has porosity making more than approximately 85 %. The grid is formed so, that makes channels - mainly crimps, includes generators of turbulence to create a difference of pressure across the grid to stimulate a medium stream running through the pores of the grid, which is not watched at absence of such difference of pressure. The invention offers preferable alternatives of realization of a structured nozzle and monolithic structures, each of which contains a catalyst for conversion of nitric oxide preferably in pores of the grid and-or deposited on the fibers. In one realization the crimped sheets made in the form of grids are placed in series with a ceramic solid monolithic structure. At that the medium containing at least one nitric oxide, which should be converted, is fed in the beginning on the crimped sheets, and then is fed in the monolithic structure for completion of conversion. In other alternative versions of realization the grid-type structure can have the different configurations including a honeycomb structure and may contain metal, metal and ceramics or ceramics, and may be filamentary. The invention ensures a heightened degree of nitric oxides conversion.

EFFECT: the invention ensures a heightened degree of conversion of nitric oxides.

15 cl, 9 ex, 19 dwg, 3 tbl