The present invention provides systems and methods for simultaneously producing a high-purity helium gas product, a methanol-water liquid mixture, and a methane-rich fuel product from a hydrogen-rich feedstock gas containing helium by treating the hydrogen-rich feedstock gas containing helium and carbon dioxide in a reverse water gas shift unit (1500) to produce carbon monoxide, which is then treated in a methanol production unit (300) and a methanol absorption unit (400) to produce a methanol-aqueous solution and a methanol-free gas. The methanol-free gas is then treated in a methane production unit (500) to produce methane, which is then treated in a carbon dioxide recovery membrane unit (1100) and a cryogenic nitrogen rejection unit (600) to produce the methanol-water liquid mixture, the methane-rich fuel product, and a helium-rich gas. The helium-rich gas is then treated to produce the high-purity helium gas product.

Provided is a hydrogen separation filter allowing a hydrogen purification at a lower temperature than conventional one, and a method for manufacturing the same. A hydrogen separation filter includes a porous substrate, a lattice expansion layer formed on the porous substrate and containing a first material, and a hydrogen dissociation and transmission layer formed on the lattice expansion layer and containing a second material selected from the group consisting of Pd, V, Ta, Ti, Nb, and alloys thereof. The first material and the second material have a same crystalline structure. A lattice constant a.sub.1, bulk of a first bulk material having a same composition and a same crystalline structure as the first material and a lattice constant a.sub.2, bulk of a second bulk material having a same composition and a same crystalline structure as the second material satisfy a formula (1):
1.03a.sub.2, bulka.sub.1, bulk1.15a.sub.2, bulk(1).

The invention relates to a method for separating gases which comprises: a first step in which a gas fuel stream comprising combustible substances that produce gas products when oxidised, and an oxygen-rich inlet stream are passed through at least two modules of oxygen-separating ceramic membranes, such that the two streams come into contact through the membranes and exchange heat; a second step of selective diffusion of oxygen from the oxygen-rich stream to the fuel stream, such that the outlet streams from the membrane modules are an oxygen-depleted or completely oxygen-free stream and a partially or completely oxidised stream; and a third step of recovery of at least two separate outlet streams of at least two gases selected from oxygen, nitrogen, carbon dioxide and hydrogen.

The present invention provides a method for separation and recovery of boron trifluoride and complexes thereof in an olefin polymerization reaction. The method for separation and recovery of boron trifluoride and complexes thereof in an olefin polymerization reaction, comprising: 1) subjecting a mixture obtained after an olefin polymerization reaction to flash distillation separation to separate part of gaseous boron trifluoride; 2) subjecting the liquid phase obtained from the flash distillation separation to membrane separation to obtain complexes of boron trifluoride and a crude product of the olefin polymerization reaction; and 3) subjecting the crude product of the olefin polymerization reaction obtained in step 2) to gas stripping separation to separate the remaining gaseous boron trifluoride, so as to obtain a pure product of the olefin polymerization reaction The present invention designs a matching process based on the polymorphic characteristics of boron trifluoride and complexes thereof to achieve efficient separation of boron trifluoride and complexes thereof from polymerization intermediates.