Modular aftertreatment assembly

A modular aftertreatment assembly for an engine system, the modular aftertreatment assembly comprising:

• a housing having a first section, a second section, and a third section, wherein the first section, the second section, and the third section are positioned adjacent to each other in a parallel arrangement, such that the second section is centrally disposed within the housing;
• a mixing tube positioned within and extending from the second section of the housing, the mixing tube having an inlet end and an outlet end, the inlet end of the mixing tube configured to couple to an exhaust conduit of the engine system, and wherein the outlet end of the mixing tube includes a plurality of slots on a top facing surface and a bottom facing surface of the mixing tube;
• a diffusion assembly including a first diffusion plate positioned between the first and second sections of the housing, and a second diffusion plate positioned between the second and third sections of the housing, the first and second diffusion plates including a plurality of openings respectively, wherein the diffusion assembly is positioned parallel to the mixing tube;
• a selective catalytic reduction assembly including a first bank of a plurality of catalysts and a second bank of a plurality of catalysts, wherein the first bank of the plurality of catalysts is positioned within the first section of the housing, and wherein the second bank of the plurality of catalysts is positioned within the third section of the housing;
• a plurality of perforations provided on an outlet face of the first bank of the plurality of catalysts and the second bank of the plurality of catalysts respectively;
• and
• a pair of outlets provided in association with the first and third sections of the housing respectively.