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01/04/2007
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Improving the turbulent flow of gases through a catalytic converter is the key to ensuring that as much of the volume of the system as possible is used, writes Roger Bishop
Or, in reality, ensuring that small areas directly in the path of incoming gases are not over-used.
Emitec sees its metal foil catalysts as having substantial advantages in this specific area over ceramic substrates because it is possible to incorporate incisions and perforations in the foils to help the process along.
The latest development is the combination of LS (Longitudinal Structure) and PE (Perforated) structure which not only presents a multiplicity of ‘turbulence’ edges which results in improved mass transfer and hence higher catalytic efficiency but also gives them increased cross-sectional through-flow.
Such metal substrates are significantly lighter making it possible to reduce the overall size of the metal substrates, along with coating mass and precious metal content.
Emitec says the development offers “many more interesting options right down to the ‘turbulent’ mass transfer adapted coatings which are currently being developed and which will lead to a further reduction in design volume, weight and system cost.”
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Author
Roger Bishop
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