A method for manufacturing a zeolite membrane structure comprises an immersion step for immersing a porous substrate in a synthetic sol, and a synthesis step for hydrothermally synthesizing a zeolite membrane on a surface of the porous substrate that has been immersed in the synthesis so. When the foamability of the synthetic sol is measured by a Ross-Miles method under a condition of 25 degrees C., the foam height after elapse of 5 minutes from completion of down flow is less than or equal to 5 mm.

A method of synthesis for an aluminophosphate-based zeolite membrane includes a steps of preparing a mixed solution with a pH greater than or equal to 6 and less than or equal to 9 by mixing an acidic phosphorous source with an alkali source, a steps of preparing a starting material solution by adding and mixing an aluminum source to the prepared mixed solution, and a steps of synthesizing an aluminophosphate-based zeolite membrane by hydrothermally synthesizing the starting material solution.

A spiral-wound acid gas separation membrane element (1) includes a wound body including a separation membrane (2), a feed-side channel component (3), and a permeate-side channel component (4) wound in a laminated state around a core tube (5). The core tube (5) has a group of holes for allowing communication between a permeate-side spatial portion defined by the permeate-side channel component (4) and a spatial portion inside the core tube (5), the group of holes being present on an end side of the core tube (5).

An article having a nanoporous membrane and a nanoporous graphene sheet layered on the nanoporous membrane. A method of: depositing a layer of a diblock copolymer onto a graphene sheet, and etching a minor phase of the diblock copolymer and a portion of the graphene in contact with the minor phase to form a nanoporous article having a nanoporous graphene sheet and a nanoporous layer of a polymer. A method of: depositing a hexaiodo-substituted macrocycle onto a substrate having a Ag(111) surface; coupling the macrocycle to form a nanoporous graphene sheet; layering the graphene sheet and substrate onto a nanoporous membrane with the graphene sheet in contact with the nanoporous membrane; and etching away the substrate.

A process for producing a zeolite membrane composite includes a step of obtaining FAU-type seed crystals, a step of depositing the FAU-type seed crystals on a support, a step of forming an AFX-type zeolite membrane on the support by immersing the support in a raw material solution and growing an AFX-type zeolite from the FAU-type seed crystals by hydrothermal synthesis, and a step of removing a structure-directing agent from the AFX-type zeolite membrane. In this way, the AFX-type zeolite membrane can be provided.

A monolithic separation membrane structure comprises a substrate, a first support layer and a separation membrane. The substrate is composed of a porous material and including a plurality of through holes. The first support layer is formed on an inner surface of the plurality of through holes. The separation membrane arranged in the first support layer. The first support layer includes an aggregate material having alumina as a main component, an inorganic binder have titania as a main component, and a sintering additive having at least one of silica and magnesia as a main component.

Methods of manufacturing ion exchange membranes and ion exchange coated electrodes are described herein. Such membranes and electrodes can be used in, for example, desalination processes.

A multilayer composite membrane consists essentially of a porous support layer, an inorganic porous layer, a polymer porous layer, and a separation layer. The inorganic porous layer consists of inorganic particles and is disposed on the porous support layer. The polymer porous layer is disposed on the inorganic porous layer. The separation layer is disposed on the polymer porous layer.

A method of preparing a graphene-based membrane is provided. The method may include providing a stacked arrangement of layers of a graphene-based material, wherein the layers of the graphene-based material define one or more nanochannels between neighboring layers, and varying an electrical charge on a surface of the layers of the graphene-based material defining the one or more nanochannels to control size selectivity and/or ionic selectivity of the graphene-based membrane. A graphene-based membrane and a method of separating ions from a fluid stream are also provided.

A method for synthesizing a supported molecular sieve membrane by microwaves includes the steps of aging, heating and synthesizing. The aging step is to make a support in contact with a synthetic liquid at 25 C. to 70 C. for 10 hours to 24 hours; the heating step is to raise a temperature of an aged system from an aging temperature to a synthesis temperature within 1 minute to 10 minutes; and the synthesizing step is to synthesize at 80 C. to 120 C. for 2 minutes to 15 minutes. The steps of heating and synthesizing are powered by microwaves.