Process for the introduction of a catalytic coating in the pores of a ceramic flow - honeycomb body.

摘要

The invention relates to a method for coating of ceramic honeycomb bodies with a catalyst suspension, the catalyst components in a carrier liquid in the form of solids and / or in dissolved form. The honeycomb structures are traversed by parallel flow ducts. The walls of the flow channels have an open pore structure on. For the coating of the channel walls and, in particular, also of the inner surfaces of the pores with the catalyst suspension, the a - and the outlet end faces of the vertically oriented honeycomb body with a perforated mask is contacted, and wherein the hole masks are arranged in such a way that the open regions of the shadow mask on the one end face of the closed areas of the shadow mask on the other end face opposite one another and vice versa. Then, the catalyst suspension is pumped from below into the honeycomb body or drawn in, until they contact the upper end face of the. Excess suspension is then removed by blowing out or under suction, the contact with the hole masks is released and the honeycomb body to fix the coating calcined.