TONEXUS Multi-Functional Catalyst integrates CO oxidation, SCR denitrification, and VOC oxidation functions into a single catalyst bed. Compared with conventional layered treatment, the integrated design can simplify the system, reduce catalyst-bed requirements, save installation space, and lower retrofit and coordination costs. It supports coordinated removal of CO, NOx, and VOCs and can be adapted to different industrial flue-gas conditions, providing a practical option for upgrading existing emission-control systems.