CATALYTIC CHEMICAL REACTOR OF AXIAL RADIAL FLOW WITH TWO CATALYST LAYERS Russian patent published in 2021 - IPC B01J8/04 B01D53/86 

FIELD: chemistry.

SUBSTANCE: group of inventions relates to a catalytic chemical reactor of axial radial flow wherein two different catalysts are used, and to a method for removing NO_x nitrogen oxides and N₂O nitrogen oxide from a gas flow. The reactor contains a catalytic layer shaped as a hollow cylinder with a vertical axis, a base, a radial gas inlet section, an axial gas inlet section located at the upper end of the catalytic layer, and a radial gas outlet section. The catalytic layer comprises a first cylindrical annular part extending from the base of the catalytic layer to the axial inlet section and comprising only the first catalyst, and a second cylindrical annular part extending from the base of the catalytic layer to the axial inlet section and comprising a second catalyst layer and a first catalyst bed located above it, wherein the first annular part and the second annular part are arranged coaxially around each other. In the second annular part, the second catalyst layer extends from the base of the catalytic layer to a predetermined interface level, and the first catalyst layer extends over the second catalyst layer from this interface level to the axial inlet section. Wherein the cylindrical surface located entirely below the interface is the gas outlet section. The reactor comprises a cylindrical wall with an upper part devoid of gas permeability and extending from the axial inlet section to the interface level, and a gas-permeable lower part located below this interface level and forming the radial gas outlet section.

EFFECT: design of the reactor provides effective treatment of a gas flow by sequentially passing it through the first and second catalysts preventing the gas from bypassing the catalyst.

11 cl, 2 dwg