Two-dimensional material based filters, their method of manufacture, and their use are disclosed. In one embodiment, a membrane may include an active layer including a plurality of defects and a deposited material associated with the plurality of defects may reduce flow therethrough. Additionally, a majority of the active layer may be free from the material. In another embodiment, a membrane may include a porous substrate and an atomic layer deposited material disposed on a surface of the porous substrate. The atomic layer deposited material may be less hydrophilic than the porous substrate and an atomically thin active layer may be disposed on the atomic layer deposited material.

A spiral-wound acid gas separation membrane element (1) includes a wound body which includes a laminate and a perforated core (5), the laminate being wound around the perforated core tube (5) and including: a separation membrane (2), a feed-side channel component (3), and an element constituent layer (e.g., permeate-side channel component (4)). The separation membrane (2) is provided with a sealing section (25) present at both widthwise ends of the separation membrane (2). The sealing section (25) is sealed with an adhesive. This makes it possible not only to separate acid gas from mixed gas more efficiently as compared to a conventional spiral-wound acid gas separation membrane element but also to save energy.

A filtration assembly includes a membrane housing and at least one membrane fixture device disposed in the housing. Each membrane fixture device has a plurality of membrane fixture members extending from fixture device inner surface, and each membrane fixture device has membrane openings between the membrane fixture members. The filtration assembly further includes a plurality of ceramic membranes each extending from a first membrane end portion to a second membrane end portion, and each first membrane end portion is disposed in one of the membrane openings, where the membrane fixture members fixture the membranes therein.

Disclosed is a header which can prevent a fixing layer for fixing the filtration membrane in the header from being detached from the header and a filtration membrane module comprising the same. A filtration membrane module of the present invention comprises a filtration membrane, a header comprising a case having an opening at an upper part thereof and a partition dividing an inner space of the case into a first space for insertion of the filtration membrane and a second space for fixing the filtration membrane, and a fixing layer. The filtration membrane is potted in the fixing layer which, together with the case, forms a filtrate collecting space in the first space. The partition has a through-hole. The fixing layer exists in at least a portion of the first space, in the second space, and in the through-hole of the partition as well.

The present invention relates to units for separation of gas mixtures using hollow fiber membranes and may be used in chemical, oil, gas and other industries. More specifically, this invention relates to the structure of the membrane gas separation module which may be applied, for instance, in membrane separation units for helium concentrate. The membrane gas separation module comprises the horizontal body with end covers and membrane cartridges made of a bundle of hollow fibers and located in an inversed manner in relation to the center. The body comprises symmetrical end sections of large diameter which are mated by conical transition sections with the central section of minor diameter. In this case length of end sections corresponds with length restricted by the body end and input area of membrane cartridges, and central section inner diameter is configured to provide both free mounting/dismounting of membrane cartridges and tight fit thereof at the sealing point with ring gaskets. Feed gas input nozzles are located on end sections of the body perpendicularly to its longitudinal axis in front of input areas of membrane cartridges, permeate output nozzles are located on end sections of the body near end covers perpendicularly to the body longitudinal axis. The technical result is reduction of weight and dimensional properties of the membrane module and the whole gas separation unit in general, as well as reduction of labor intensity of operations during mounting/dismounting of body end covers of the membrane module.

The present invention is directed to a method of sealing the free end of a hollow fiber membrane for use in a single header filtration module by dipping the end of the membrane into a low-viscosity light-curable adhesive and curing the adhesive. The invention further encompasses the resulting sealed hollow fiber membrane with a diameter that is only slightly larger than the diameter of the unsealed membrane.

A membrane envelope stack for gas separation comprising membrane envelopes bonded together by means of an adhesive having a tensile E-modulus of at least 1600 N/mm.sup.2 and/or an elongation at break of 20% or less and/or a Tg of at least 50? C.

An improved method of sealing a ceramic part to a solid part made of ceramic, metal, cermet or a ceramic coated metal is provided. The improved method includes placing a bond agent comprising an Al.sub.2O.sub.3 and SiO.sub.2 based glass-ceramic material and organic binder material on adjoining surfaces of the ceramic part and the solid part. The assembly is heated to a first target temperature that removes or dissolves the organic binder material from the bond agent and the assembly is subjected to a second induction heating step at a temperature ramp rate of between about 100? C. and 200? C. per minute to temperatures where the glass-ceramic material flows and wets the interface between adjoining surfaces. The assembly is rapidly cooled at a cooling rate of about 140? C. per minute or more to induce nucleation and re-crystallization of the glass-ceramic material to form a dense, durable and gas-tight seal.

The present disclosure relates, according to some embodiments, to systems, apparatus, and methods for fluid purification (e.g., water) with a ceramic membrane. For example, the present disclosure relates, in some embodiments, to a cross-flow fluid filtration assembly comprising (a) membrane housing comprising a plurality of hexagonal prism shaped membranes (b) an inlet configured to receive the contaminated fluid and to channel a contaminated fluid to the first end of the plurality of hexagonal prism shaped membranes, and (c) an outlet configured to receive a permeate released from the second end of the plurality of hexagonal shaped membranes. The present disclosure also relates to a cross-flow fluid filtration module comprising a fluid path defined by a contaminated media inlet chamber, a fluid filtration assembly positioned in a permeate chamber and a concentrate chamber.

The present disclosure relates more to processes for making a filter element that includes a filter membrane having a strip of thermoplastic polymer material laminated thereto, for example, as a strip along an edge of the filter membrane. For example, one such process includes providing a sheet of filter membrane having a first surface and an opposed second surface; providing a strip of thermoplastic polymer material having a first surface and an opposed second surface; contacting the first surface of the strip of thermoplastic polymer material with the first surface of the filter membrane; and softening the strip of thermoplastic polymer material at at least its first surface by irradiation with laser radiation; such that the softened polymer material of the first surface of the strip of thermoplastic polymer material bonds to the first surface of the filter membrane upon hardening.