Gasoline Direct Injection (GDI) engines require gasoline particulate filters (GPFs) as a key component of the emissions control system to reduce particulate emissions. GPFs are known to have poor initial performance, with performance increasing after the filter develops a cake. This poor initial performance make it impossible to accurately assess vehicle emissions performance at the mileage requirements for vehicle certification. Compositions and methods are disclosed to improve filtration efficiency in a fresh or low mileage GPF.

The invention provides a composite ceramic filter material for high temperature flue gas dust removal, wherein the filter material is prepared by the following method: provide corn stalk raw material and silicon powder, crush the corn stalk raw material and pyrolyze the crushed corn stalk raw material to obtain carbonized corn stalks; spread silicon powders on the corn stalk raw material to obtain mixed powder; perform first high-temperature heat treatment on the mixed powder to obtain silicon carbide powder; add silicon carbide powder into ethanol; add PVB to the ethanol suspension of silicon carbide to obtain a dispersion solution of silicon carbide; perform surface treatment on the aluminum alloy base material; porous silicon carbide film is formed on the surface of the surface treated aluminum alloy by air spraying technology; perform pre-sintering on the porous silicon carbide film; perform sintering on the pre-sintered porous silicon carbide film.

A handling bar for laminated or film supports, such as paper, is disclosed, including a hollow tubular body provided with an inner cavity and an outer side surface, a plurality of through holes, arranged on the tubular body to put the inner cavity in contact with the outer side surface. The handling bar also includes at least one connection to a compressed air source or a suction device, where the connection is shaped for the inflow of compressed air or to suction air into the cavity and at least one filtering element arranged inside the tubular body where at least at one portion of the holes filters the air passing between the inner cavity and the holes.

The disclosure generally relates to filters, methods, and systems for filtering particulates from the exhaust of internal combustion engines such as gasoline direct injection engines and methods of preparing particulate filters.

A liquid hydrocarbon filterability system includes a liquid hydrocarbon sample source piping in fluid communication with a liquid hydrocarbon sample container. A filtration media element is in fluid communication with the liquid hydrocarbon sample source piping. Filtered liquid hydrocarbon outlet piping is in fluid communication with and downstream of the filtration media element. A flow or volume measurement element is in fluid communication with the filtered liquid hydrocarbon outlet piping and is configured to measure an amount of liquid hydrocarbon passing through the filtration media element. A constant pressure source is configured to provide liquid hydrocarbon to the filtration media element at a constant pressure.

A build material container for use in 3D printing includes a reservoir to hold build material and a build material outlet structure. The container also includes a throughput structure to allow air to enter into the reservoir through the throughput opening, wherein said throughput opening provides access to build material in and out of the reservoir.

A filter for filtering particulate matter (PM) from exhaust gas emitted from a compression ignition engine, which filter comprising a porous substrate having inlet surfaces and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a porous structure containing pores of a first mean pore size, wherein the porous substrate is coated with a wash coat comprising a plurality of solid particles comprising a molecular sieve promoted with at least one metal wherein the porous structure of the wash coated porous substrate contains pores of a second mean pore size, and wherein the second mean pore size is less than the first mean pore size.

A self-supporting filter media as well filter element and filtration system including the same is provided. A method of manufacturing the self-supporting filter media is also provided. The self-supporting filter media is formed such that it has a rigidity which permits the omission of filter support cage or other internal media support structure.

A ceramic honeycomb structure having pluralities of flow paths partitioned by porous cell walls; (a) the cell walls having porosity of 50-60%; and (b) in a pore diameter distribution in the cell walls measured by mercury porosimetry, (i) pore diameters at cumulative pore volumes corresponding to particular percentages of the total pore volume being within specific ranges and having specific relationships; and (ii) the difference between a logarithm of the pore diameter at a cumulative pore volume corresponding to 20% of the total pore volume and a logarithm of the pore diameter at 80% being 0.39 or less, and its production method.

A ceramic honeycomb structure having pluralities of flow paths partitioned by porous cell walls; (a) the cell walls having porosity of 50-60%; and (b) in a pore diameter distribution in the cell walls measured by mercury porosimetry, (i) pore diameters at cumulative pore volumes corresponding to particular percentages of the total pore volume being within specific ranges and having specific relationships; and (ii) the difference between a logarithm of the pore diameter at a cumulative pore volume corresponding to 20% of the total pore volume and a logarithm of the pore diameter at 80% being 0.39 or less, and its production method.