Membrane-based gas separation

Dehydration of natural gas using membranes. Part I: Composite membranes

A cartridge containing a plurality of hollow fiber membranes is disclosed. The cartridge comprises a plurality of fibers (20) arranged in a bundle and at least one end of the bundle embedded in a tubesheet (30). The tubesheets (30) are fitted with end caps (28) to provide a chamber for the permeate. A feed tube (36) extends longitudinally through the bundle and a permeate discharge tube (40) is housed, preferably concentrically, within a feed tube (36). The cartridge does not required a high pressure seal, such as an O-ring seal, against the inner wall of the pressure vessel (10). The cartridge is configured as a single unit adapted for simple drop-in installation into a pressure vessel (10). Multiple cartridges may readily be inserted into a pressure vessel (10), and arranged so as to operate in series or in parallel. The hollow fiber membrane cartridge is adapted for industrial performance with high volumetric efficiency and high solute rejection.

Hollow fiber cartridge

Upgrading low-quality natural gas with H2S- and CO2-selective polymer membranes: Part I. Process design and economics of membrane stages without recycle streams

Design and fabrication of hollow fiber membrane modules

A hollow fiber membrane gas separation apparatus of a compact design suitable for separation and purification of gases is disclosed. The apparatus comprises an outer housing that consists of a detachable bowl and a head closure, and a removable hollow fiber membrane cartridge positioned therein. The cartridge contains several concentric separation zones and provides for efficient countercurrent flow configuration between the feed gas on the shell side and the permeate sweep gas on the lumen side of the hollow fiber membranes.

Hollow fiber membrane gas separation cartridge and gas purification assembly

A fluid separation device comprising an annular hollow fibers bundle in a shell having four ports, a fluid entrance port, a sweep fluid entrance port, a nonpermeate exit port and a sweep fluid-permeate exit port, wherein said bundle is encased in an essentially nonpermeable film barrier.

Fluid separation device

Process for the dehydration of gases using composite permeable membranes, preferably hollow fiber composite membranes comprised of a porous support coated with an ultrathin layer of a defined sulfonated polysulfone or sulfonated polyether ketone. The processes also contemplate the use of a sweep or purge gas on the water-enriched permeate side of the composite membrane to increase the efficiency of the dehydration process.

Process for dehydration of gases and composite permeable membranes therefor

An integral hollow fiber membrane gas purification apparatus is disclosed. The apparatus comprises one or more filtration elements and a hollow fiber membrane cartridge placed coaxially in a common housing. In some embodiments, the filtration elements are omitted and the hollow fiber membrane cartridge is employed as a combined gas separation/filtration device. The apparatus of this invention is particularly useful for conditioning compressed air that includes the removal of both suspended matter and water vapor.

Integral hollow fiber membrane gas dryer and filtration device

A mathematical model was developed and experimentally verified over a wide range of operating conditions for synthetic air and helium-nitrogen mixtures by measuring pressure, flow rate, and concentration profiles on the permeate side of the hollow fiber. Both countercurrent and cocurrent flow patterns are used, and the effect of permeate side radial mixing was examined

Salvatore Giglia

Papers

Hollow fiber membrane gas separation cartridge and gas purification assembly

Fluid separation device

Process for dehydration of gases and composite permeable membranes therefor

Integral hollow fiber membrane gas dryer and filtration device

Mathematical and experimental analysis of gas separation by hollow fiber membranes