PARTICULATE FILTER HAVING A CENTRALIZED-DISTRIBUTED FUNCTIONAL MATERIAL LAYER AND PROCESS FOR PREPARING THE SAME

• Main Authors: SIEMUND, Stephan, YIN, Xiao Min, SIANI, Attilio, JIANG, Jun Cong, SCHMITZ, Thomas, SHEN, Ye, QI, Yun Fei, WALTZ, Florian
• Format: Patent
• Language: English; French; German
• Published: 11.10.2023
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SEPARATION; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING

The disclosure relates to a particulate filter for the treatment of exhaust gas from an internal combustion engine, wherein the particulate filter comprises a functional material layer, and the amount of the functional material layer in the region which is around the whole central axis of the particulate filter and accounts for 11.1 vol. % of the total volume of the particulate filter, is in the range from 13 to 40 wt. %, based on the total weight of the functional material layer, relates to the process for preparing the particulate filter and relates to a method for the treatment of exhaust gas from an internal combustion engine. The particulate filter according to the present invention has a centralized-distributed functional material layer in the radial direction, shows excellent filtration efficiency and low backpressure.