SECTION TITLE
MATERIALS • PROCESSES • FINISHES
ADSORPTIONIS THE ANSWER B
An innovative smart gas cleaning technology using natural adsorber materials is going mobile
y definition, adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. Tis
surface phenomenon is present in many natural, physical, biological and chemical systems, and is widely used in industrial applications such as heterogeneous catalysts, activated charcoal, capturing and using waste heat to provide cold water for air conditioning and other process requirements, synthetic resins, and water purification, among other purposes. Austrian gas purification and fermentation specialist Krajete develops adsorber-based purification technologies for emission gases and biological methane production which build on these
successful adsorption processes from nature. Based on natural raw materials, the company’s Advanced Adsorption Technology can remove numerous gaseous emissions for waste gas streams, including nitrogen oxide, and reuse them in line with circular economy principles.
THE POTENTIAL OF PHYSISORPTION Krajete’s physisorption-based Advanced Adsorption Technology has already proven its potential for the almost complete removal of nitrogen oxides from exhaust gases for large cities, car manufacturers, waste disposal firms and mining companies, says Dr. Alexander Krajete, the company’s CEO.
The Advanced Adsorption Technology mobile test unit
“We specialise in converting
problematic emissions as completely as possible into valuable resources through natural processes,” he explains. “To do this, we use a principle known as physisorption – the reversible binding of harmful gas emissions such as nitrogen oxides to natural adsorber materials such as silica, zeolite or aluminium oxide. Te advantages of this technology for the circular economy are obvious: all bound pollutants can be removed from the adsorber by simple means, collected, refined, and used commercially.” While the use of such adsorber materials for gas purification is well known, the reversible binding of the pollutants – and therefore their subsequent use as a valuable material – has not yet been achieved, he adds. In recent years, though, Krajete has achieved this feat in cooperation with several ‘major companies’. In particular, the principle has proved successful in the case of nitrogen oxides; by simply heating the advanced adsorber, the bound nitrogen oxide can be collected and refined into valuable
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