| 摘要 |
The invention relates to a method for coating ceramic honeycomb bodies with a catalyst suspension, which in a carrier fluid comprises catalyst components as solid matter and/or in dissolved form. Parallel flow ducts extend through the honeycomb bodies. The walls of the flow ducts have an open pore structure. In order to coat the duct walls, and particularly also the inner surfaces of the pores, with the catalyst suspension, the inlet and outlet faces of the perpendicularly oriented honeycomb bodies are brought in contact with a shadow mask each, wherein the shadow masks are disposed such that the open regions of the shadow mask on the one face are located opposite the closed regions of the shadow mask on the other face, and vice versa. Then, the catalyst suspension is pumped or suctioned from beneath into the honeycomb bodies until it exits at the upper face. Thereafter, excess suspension is removed by blowing or vacuuming, the contact with the shadow masks is eliminated, and the honeycomb body is calcined to fix the coating.
|
