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 ɣ-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 ɣ-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.

Quality evaluation

MFI membranes:
The single gas helium permeance of membrane + support is better than 80 x 10-7 mol/m2 s Pa. Permporometry will be used to evaluate the quality of the membrane [1] before delivery. The area of defects larger than 1.2 nm will be smaller than 0.5% of the total membrane area, i.e. virtually defect free membranes.

CHA membranes:

The single gas hydrogen permeance of membrane + support is better than 50 x 10-7 mol/m2 s Pa. H2/SF6 permeance ratio will be used to evaluate the quality of the membrane before delivery. The H2/SF6 permeance ratio will be higher than 500, i.e. the membrane should have a SF6 permeance lower than 0.1 x 10-7 mol/m2 s Pa [8].

Delivery

The membrane will be mounted in a homemade stainless steel module and delivered to customer together with a quality specification. Ask for a quotation!

If you need a new membrane, you just send the steel module back to us and we will mount a new membrane for you including a new quality specification. You just need to pay for the new membrane and delivery fee. Ask for a quotation!

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