Currently, the following products are available:


1. Disc MFI and CHA membranes and modules with a membrane area of 3 cm2. More information can be found in “Description of the membranes” section. A disc membrane module with a membrane area of 3 cm2 is shown in Picture 1 below, together with a stainless steel module.

2. Tubular MFI and CHA membranes and modules with a membrane area of 15 cm2. More information can be found in “Description of the membranes” section. A tubular membrane with a stainless steel module is shown in Picture 2 below.


Description of the membranes

Geometry

The smallest disc zeolite membranes available are deposited on circular α-alumina supports having an area of 3 cm2 (the disc with a diameter of 25 mm). The membrane is mounted in a stainless steel module that can withstand pressures up to 100 bar. The supports consist of a 30 µm thick top layer with a pore size of 100 nm and a 3 mm thick base layer with a pore size of 3 µm.

The smallest tubular zeolite membranes available are deposited on circular α-alumina supports having an area of 15 cm2. The tubular supports have a length of 100 mm, an inner diameter of 7 mm, and an outer diameter of 10 mm.  The membrane is mounted in a stainless steel module that can withstand pressures up to 30 bar. The support consists of a 25-30 µm inner layer with a pore size of 100 nm and a 1.5 mm thick base layer with a pore size of 3 µm.

Specifications

For MFI membranes

  • Single gas helium permeance > 70 x 10-7 mol/(m2 s Pa) for dry membrane at room temperature.

  • Helium permeance < 0.5% of the single gas helium permeance for dry membrane at a relative pressure p/p0≈0.025 of n-hexane and room temperature.

For CHA membranes

  • Single gas hydrogen permeance > 50 x 10-7 mol/(m2 s Pa) for dry membrane at room temperature.

  • SF6 permeance < 0.1 x 10-7 mol/(m2 s Pa) for dry membrane at room temperature. H2/SF6 permeance ratio > 500.

Delivery

The membrane will be mounted in a stainless steel module and delivered to the customer with a report showing measured permeance as specified above. A quotation will be given on request.

If you for some reason need a new membrane, send the steel module to us and we will mount a new high quality membrane for you. You just need to pay for the new membrane and delivery fee.

Picture 1. Disc membrane with a stainless steel module

Picture 1. Disc membrane with a stainless steel module

Picture 2. Tubular membrane with a stainless steel module

Picture 2. Tubular membrane with a stainless steel module