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First HybSi® pilot test scheduled

In the coming months, the first on-site pervaporation pilot test using HybSi® membrane technology will be performed. We regard this as the next step for the industrial acceptance of this technology and it is an essential part in our implementation strategy. The tests are designed to confirm the long term performance of the HybSi® membranes under industrial conditions. For this purpose about 30m3 of an end-of-pipe fuel will be dehydrated. By doing so, the calorific value of the fuel will be enhanced in an energy efficient way. The mem­brane tests, that will last for a few months, will be performed using an ECN-skid mounted unit equipped with 1m2 of mem­brane area.

The ECN partners in this EOS-KTO spon­sored project are Trion Partners, Air Products, Sulzer Chemtech and Deltalinqs.

Hydrogen separation possible with HybSi®

Recent experiments have shown that off-the-shelve HybSi® pervaporation membranes can selectively remove hydrogen from a mixture of gases. Because of the proven high hydrothermal stability in pervaporation applications, it is expected that these membranes can be used to shift the equilibrium of the water gas shift reaction to the product side as well. Gas permeation tests performed at 250°C indicate a selectivity of 14 for hydrogen versus methane, with a hydrogen permeance of 2∙10-6 mol/m2sPa. This permeance is rather high as compared to other ceramic gas separation membranes. We consider these results as promising albeit the selectivity is currently too low for industrial application.

Second HybSi® patent granted

A second patent on the hybrid silica membranes has been granted and published. The main focus of this patent is pore size reduction to tailor the HybSi® membranes for different applications. This patent broadens the application field to water removal from small organics (e.g. improved selectivity in dehydration pervaporation of ethanol) and the separation of hydrogen from e.g. N2, CO, CO2, CH4.