There is disclosed an air-oil separator for a gas turbine engine. The separator has a first separator section having a first separator rotatably mounted about a rotation axis and having an air-oil mixture inlet and an air-oil mixture outlet; a second separator section having a second separator rotatable about the rotation axis, the second separator having a first air-oil mixture inlet fluidly connected to the air-oil mixture outlet of the first separator, and a second air-oil mixture inlet; and an air outlet. A first flow path extends from the first air-oil mixture inlet to the air outlet through the two separator sections, and a second flow path extends from the second air-oil mixture inlet to the air outlet, solely through the second separator section A method of operating an air-oil separator is also disclosed.

There is disclosed a separator having a first separator and a matrix separator. The first separator caters to an air-oil mixture having a first oil concentration and the matrix separator caters to an air-oil mixture having a second oil concentration being less than the first oil concentration. The matrix separator is disposed at least partially concentrically within the first separator. A wall is disposed radially between the first and second separators. A radial passage extends through the wall. An air-oil mixture outlet of the first separator is fluidly connected to an air-oil mixture inlet of the matrix separator via the radial passage. At least one passage extends radially outwardly from the matrix separator across the first separator. The at least one passage fluidly connects the matrix separator to an environment outside the air-oil separator. A method of removing oil from an air-oil mixture is also disclosed.

A method and assembly for utilizing open-cell cellular solid material in a component separation unit to separate one or more process streams into component process streams having desired compositions. A method and assembly for using said open-cell cellular solid material to separate process streams into desired component process streams in a component separation unit, wherein the open-cell cellular solid material can include oxides, carbides, nitrides, borides, ceramics, metals, polymers, and chemical vapor deposition materials.

A method and assembly for utilizing open-cell cellular solid material in a component separation unit to separate one or more process streams into component process streams having desired compositions. A method and assembly for using said open-cell cellular solid material to separate process streams into desired component process streams in a component separation unit, wherein the open-cell cellular solid material can include oxides, carbides, nitrides, borides, ceramics, metals, polymers, and chemical vapor deposition materials.

A method for removing contaminants from an process stream that includes the use of reticulated material to filter the process stream. The reticulated material also facilitate process stream flow distribution in process units. The reticulated material can be packed with a void space between a substantial number of the reticulated material that can be varied to enhance filtration and flow distribution. The method of filtering also provides a method of removing contaminants leaving process equipment. The methods can be used on a variety of process streams and process equipment. The reticulated material can include ceramics, metallic materials, and chemical vapor deposition elements. The reticulated material can be of various shapes and sizes, and can also be catalytically active.

A filter for a refrigerator, with the filter including a housing having a main wall and a peripheral wall extending from the main wall to define a cavity. A filter body and a cooling plate may be coupled to the housing and positioned within the cavity. A cover may be coupled to the housing and have at least one inlet opening and at least one outlet opening spaced from the at least one inlet opening. The cover may be transitional between a closed position and an open position. In the closed position, the cover may extend over the cavity and define a fluid flow path from the at least one inlet opening, across the filter body, and through the at least one outlet opening. At least a portion of the cavity may be exposed as the cover transitions from the closed position toward the open position.

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 coated, reticulated foam air filter for filtering air suitable for respiration is described. The air filter comprises a reticulated foam structure and a nontoxic tackified coating applied to a functional surface of the foam structure.

A filter media block and filter element incorporating same are provided. Methods of forming a filter media block and filter element are also provided. The filter media block includes a block of filter media and an outer permeable layer. The outer layer provides support for the block of filter media.

The invention relates to an air filter for an air treatment system of a vehicle and method for manufacturing such an air filter (1), the air filter (1) comprising at least one foam filter element (2), wherein the foam filter material is or comprises a material with inherent electrostatic triboelectric charging characteristics, and to a method for manufacturing such an air filter.