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.

A repair method for a separation membrane including a step of applying a colloidal solution to a surface of a separation membrane formed on a support. The colloidal solution has a predetermined pH. In colloidal solution, repair material particles are dispersed in an aqueous solvent. The repair material particles have an electrical charge that is opposite to an electrical charge of the support at the predetermined pH.

Disclosed herein is an ion selective separation membrane including: a metal organic framework layer formed on, in, and/or around a substrate, the metal organic framework having a crystal structure that includes a first surface and a second surface and includes ion transport channels formed between respective pore windows in the first surface and the second surface; first and second electrodes to apply a potential difference across the membrane; wherein the respective pore windows have a pore size that is less than the hydrated diameter of the ion for which the ion selective separation membrane is selective.

Disclosed are a heterogeneous zeolite membrane and a method of preparing the same, and more particularly a heterogeneous zeolite membrane that has CHA and DDR zeolite structures by growing seed particles into a crystal structure different from that of the zeolite membrane and can thus separate CO.sub.2/N.sub.2 and CO.sub.2/CH.sub.4 even under wet conditions, a method of preparing the same, and a method of capturing and removing carbon dioxide using the membrane.

The present disclosure discloses a nano-separation refrigeration system and discloses a refrigeration circulation method, wherein the nano-separation refrigeration system includes an evaporator provided with an inlet and an outlet; a condenser provided with a condensation cavity, a gas inlet, a gas outlet, and a liquid outlet, wherein a molecular sieve membrane is disposed in the condensation cavity between the gas inlet and the gas outlet, and the molecular sieve membrane is configured to separate a mixed gas; a first connecting pipe having one end connected to the outlet and the other end to the gas inlet; a second connecting pipe having one end connected to the liquid outlet and the other end to the inlet; a third connecting pipe having one end connected to the gas outlet and the other end to the inlet.

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.

Provided is a method for separating ammonia gas using zeolite membrane having excellent separation stability at a high temperature capable of separating ammonia gas from a mixed gas composed of multiple components including ammonia gas, hydrogen gas, and nitrogen gas to the permeation side with high selectivity and high permeability. Also provided is a method for separating ammonia by selectively permeating ammonia gas from a mixed gas containing at least ammonia gas, hydrogen gas, and nitrogen gas using a zeolite membrane, wherein the ammonia gas concentration in the mixed gas is 1.0% by volume or more.

A method and a system for the coproduction of hydrogen, electrical power, and heat energy. An exemplary method includes desulfurizing a feed stream to form a desulfurized feed stream, reforming the desulfurized feed stream to form a methane rich gas, and providing the methane rich gas to a membrane separator. A hydrogen stream is produced in a permeate from the membrane separator. A retentate stream from the membrane separator is provided to a solid oxide fuel cell (SOFC). Electrical power is produced in the SOFC from the retentate stream.

Provided herein are one-step methods for fabricating an asymmetric mixed-matrix membrane and the asymmetric mixed matrix membrane so fabricated. In the one step method an asymmetric polymer film is formed from a liquid polymer solution and a ligand precursor simultaneously with the formation of metal-organic framework filler particles therein. Also provided is a method for separating a mixture of gases or of liquids by flowing the mixture through the asymmetric mixed matrix membrane.

The present invention provides a separation membrane suitable for separating water from a liquid mixture containing an alcohol and water. The separation membrane of the present invention includes a metal organic framework. On the separation membrane, at least one of requirements (i) and (ii) below holds: (i) a ratio R1 of a number N2 of molecules satisfying a specified condition (b) with respect to a number N1 of molecules satisfying a specified condition (a) is less than 0.29; (ii) a ratio R2 of an adsorption amount of water adsorbed by the metal organic framework under water vapor at 25° C. and 3.2 kPa with respect to an adsorption amount of ethanol adsorbed by the metal organic framework under an ethanol atmosphere at 25° C. and 7.4 kPa is more than 4.0.