A particulate filter and method of manufacture. The particulate filter comprises a ceramic honeycomb body comprising a plurality of intersecting walls that define a plurality of channels extending longitudinally though the ceramic honeycomb body. The intersecting walls comprise a porous ceramic material having a microstructure that comprises an interconnected network of porous spheroidal ceramic beads. The microstructure has a total porosity defined as the sum of an open intrabead porosity of the beads and an interbead porosity defined by interstices between the beads in the interconnected network. The microstructure has a bimodal pore size distribution in which an intrabead median pore size of the intrabead porosity is from 1.5 μm to 4 μm and an interbead median pore size of the interbead porosity is from 6 μm to 20 μm.

Air filters, and air filter devices for use in helicopters, and methods of use, are disclosed.

A metallic filter (1) includes a microstructured architecture (2) defined in a three-dimensional space having orthogonal axes, microstructured architecture (2) includes a metallic network (10) formed by a plurality of longitudinal connecting strands (12), namely extending along a longitudinal axis direction (X), and a network (20) of pores formed of a plurality of longitudinal interstices (22) located along connecting strands (12). Each longitudinal interstice corresponding to a subset of pores (24) of the network (20) of pores. The subset of pores (24) for which the pores are aligned along the longitudinal axis (X), the longitudinal interstices (22) thereby defining an axis of anisotropy of the microstructured architecture.

An exhaust gas purification filter comprises a base material part, a catalyst layer, and sealing parts. The base material part comprises porous partition walls. The catalyst layer is supported on pore walls of the partition walls. The partition walls supporting the catalyst layer comprise 10% or less of pores having a pore diameter of 50 μm or more. In the pore diameter distribution in the partition walls supporting the catalyst layer, the pore diameter D50 at which the cumulative pore volume becomes 50% is 10 μm or more. The pore diameter D50, and the pore diameter D10 at which the cumulative pore volume becomes 10%, satisfy the relationship of the following Expression 1.

(D50−D10)/D50≤0.9  Expression 1

A ceramic honeycomb structure having pluralities of flow paths partitioned by porous cell walls, (a) the cell walls having porosity of 50-63%; 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; (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 (iii) the volume of pores of more than 100 μm being 0.03 cm.sup.3/g or less.

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 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 manufacturing method enabling the obtainment of a functional part essentially formed in a metallic material, all or part of the functional part delimiting a filtering medium permeable to a fluid and delimiting first and second main faces for a preferred circulation of the gas through the filtering medium. The method includes a main phase consisting of an additive manufacturing method in successive passes from a support tray. Each pass includes the deposition of at least one layer of the metallic material, the deposited material adhering to the metallic material deposited before. The deposition is controlled at each pass so the stack of metallic material constitutes the functional part. The filtering medium includes a coalescent network of connecting strands interconnected according to a three-dimensional spatial distribution between the faces, the connecting strands of the network delimiting therebetween pores spatially distributed within the filtering medium in three dimensions between the faces.

A system for biological methane production and removing carbon dioxide from the methane comprises (a) a primary anaerobic digester adapted and arranged to generate a gaseous mixture comprising methane and carbon dioxide from organic materials; (b) an electrochemical reactor comprising at least one reactor cell including an anode spaced from a cathode by a porous ion exchange resin wafer with a cation exchange membrane between the anode and the resin wafer and a bipolar ion exchange membrane between the cathode and the resin wafer; the electrochemical reactor being adapted and arranged to capture gaseous carbon dioxide within the resin wafer as aqueous bicarbonate, and to electrochemically generate hydrogen gas at the cathode; and (c) a hydrogenotrophic methanogenesis bioreactor adapted and arranged to convert the bicarbonate and hydrogen from the electrochemical reactor to methane. An electrochemical reactor and a method for producing methane with reduced carbon dioxide content also are described.

A face mask with microporous filter membrane layer is presented. The face mask with microporous filter membrane layer contains a mask body at least one strap and a sealing element. The mask body contains a first end a second end an outer layer at least one intermediate layer and an inner layer. The first end and the second end are terminally positioned longitudinally opposite to each other along the mask body. The at least one strap is distributed about the first end and the second end. The sealing element is perimetrically connected along the outer layer inner layer and the at least one intermediate layer. The at least one intermediate layer is connected between the outer layer and the inner layer through the sealing element