METHODS OF MAKING HONEYCOMB BODIES HAVING INORGANIC FILTRATION DEPOSITS

    公开(公告)号:US20250034052A1

    公开(公告)日:2025-01-30

    申请号:US18716241

    申请日:2021-12-17

    Abstract: Methods for applying a surface treatment to a plugged honeycomb body comprising porous wall includes: atomizing particles of an inorganic material into liquid-particulate-binder-adhesion promoter droplets comprised of an aqueous vehicle, an alkali-free binder and an adhesion promoter, and the particles, evaporating substantially all of the aqueous vehicle from the droplets to form agglomerates comprised of the particles and the alkali-free binder and the adhesion promoter, and depositing the agglomerates onto the porous walls of the plugged honeycomb body, wherein the agglomerates are disposed on, or in, or both on and in, the porous walls. Plugged honeycomb bodies comprising porous walls and inorganic material deposited thereon are also disclosed.

    HONEYCOMB BODY WITH POROUS MATERIAL

    公开(公告)号:US20210205750A1

    公开(公告)日:2021-07-08

    申请号:US17273064

    申请日:2018-09-03

    Abstract: A honeycomb body (100) having a porous ceramic honeycomb structure with a first end (105), a second end (135), and a plurality of walls (115) having wall surfaces defining a plurality of inner channels (110). A porous material is disposed on one or more of the wall surfaces of the honeycomb body (100). A method for forming a honeycomb body (100) includes depositing a porous inorganic material on a ceramic honeycomb body (100) and binding the porous inorganic material to the ceramic honeycomb body (100) to form the porous layer.

    OFFLINE MEASUREMENT OF HONEYCOMB BODY FILTRATION EFFICIENCY

    公开(公告)号:US20230213433A1

    公开(公告)日:2023-07-06

    申请号:US18008510

    申请日:2020-07-08

    CPC classification number: G01N15/1434 G01N15/1404 G01N2015/1486

    Abstract: Apparatus and methods are disclosed which are capable of being used to determine filtration efficiency of a filter body even in a clean state. Methods of determining a filtration efficiency of a filter including forcing an inlet flow comprised of a gas (such as air) flow into the inlet end of the filter at a set flow rate, introducing particles such as smoke particles into the inlet flow, and optically counting the number of particles entering and exiting the filter during a sampling event, such as with diffraction based optical particle counters positioned upstream and downstream of the filter. Preferably the gas flow is a soot-free flow stream which does not load the honeycomb filter body with contaminants that need to be removed or burned out. The filter body can thus remain in an essentially clean state even after testing its filtration efficiency.

Patent Agency Ranking