Described are methods, systems, and apparatus for processing a gas mixture that contains at least two gases by contacting the gas mixture with a membrane that allows for preferential flow of one of the gases through the membrane, to separate one constituent gas from the mixture.

A separation membrane module includes a separation membrane complex having a support and a separation membrane provided on the support, a housing container for housing the separation membrane complex, and a sealing member existing between a supporting surface provided inside the housing container and a supported surface of the separation membrane complex, being in close contact with the supporting surface and the supported surface. A first static friction coefficient between the sealing member and the supported surface and/or a second static friction coefficient between the sealing member and the supporting surface are/is not higher than 0.5. A value obtained by multiplying the first static friction coefficient and/or the second static friction coefficient by a compressive force [N] of the sealing member and dividing the product by a mass [kg] of the separation membrane complex is larger than 0.7.

There is provided a membrane comprising: a porous support layer having a first surface and a second surface; a palladium (Pd)-based selective layer on a first surface of the support layer; and a zeolite protective layer on a second surface of the support layer, wherein the support layer is between the Pd-based selective layer and the zeolite protective layer. There is also provided a method of forming the same.

Solid sorbents, and especially zeolites, are attractive candidates for CO.sub.2 direct air capture (DAC) and point source capture applications because of their potential for high selectivity, fast kinetics, and low energy CO.sub.2 capture cycles. A common issue with solid sorbents, including zeolites, is their low thermal conductivity, which makes them difficult to heat for regeneration without using complex and expensive heat transfer systems. This invention utilizes a modified TVSA process which utilizes the product CO.sub.2 gas itself as the heating medium for the adsorbent bed, alone or in conjunction with internal or external heaters. The use of CO.sub.2 as a heating medium allows efficient heating of the sorbent bed and enables high purity CO.sub.2 product.

The present invention relates to ZIF nanoparticles introduced with three kinds of ligands, a method for preparing the same, a hybrid membrane including the same, and a gas separation method using the hybrid membrane. Nanoparticles of a zeolitic imidazolate framework (ZIF) into which three kinds of ligands are introduced, the nanoparticles comprising metal ions, and an organic ligand bound to the metal ion, wherein the organic ligand comprises an imidazole-based first organic ligand, alkylamine-based second organic ligand, and third organic ligand comprising at least one amine group substituted on the ring.

A separation membrane complex includes a porous support and a separation membrane formed on the support and used to separate fluid. A supply/permeation area ratio obtained by dividing a supply-side surface area by a permeation-side surface area is higher than or equal to 1.1 and lower than or equal to 5.0, the supply-side surface area being the area of a region of the surface of the separation membrane to which fluid is supplied, the permeation-side surface area being the area of a region of the surface of the support from which fluid that has permeated through the separation membrane and the support flows off.

The present disclosure is directed to a method for making a MER framework type zeolite, a MER framework type zeolite having a stick-like morphology, and processes for the selective separation of carbon dioxide (CO.sub.2) from multi-component feedstreams containing CO.sub.2 using the zeolite.

The present invention relates to a separator membrane having a hierarchical structure, a production method therefor and a xylene separation method using same, and to: a separator membrane having a hierarchical structure comprising mesopores, the separator membrane having mesopores introduced inside a microporous zeolite separator membrane, thereby being thin, having less defects and exhibiting high xylene permeation and separation performance; a production method therefor; and a xylene separation method using same.

A separation system includes first and second separation parts each having a separation membrane and provided with a fluid supply port, a permeate fluid exhaust port, and a non-permeate fluid exhaust port, an intermediate connecting part for connecting the permeate fluid exhaust port of the first separation part and the fluid supply port of the second separation part, a supply pipe connected to the fluid supply port of the first separation part, in which a mixed fluid flows at a pressure higher than an atmospheric pressure, and a pressure reducing part connected to the permeate fluid exhaust port of the second separation part, for reducing a pressure inside the permeate fluid exhaust port to a pressure lower than the atmospheric pressure. A pressure inside the intermediate connecting part is lower than a pressure inside the supply pipe and not lower than the atmospheric pressure.

Provided is a method for producing purified acetic acid from a mixed solution containing acetic acid, an organic solvent, and water in an energy-efficient manner. The method, which is for producing purified acetic acid from a mixed solution containing acetic acid, an organic solvent, and water, includes: a distillation step in which the mixed solution is distilled and separated into a purified liquid rich in acetic acid and a separated liquid rich in an organic solvent; and a membrane separation step in which the water is separated from the purified liquid by a separation membrane. The purified liquid has a water concentration of 4 wt.% or less.