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International Journal of Mechanical and Industrial Engineering

Abstract

Oxygen enrichment, one of the inlet air modification techniques, proves to be a promising technique in reducing smoke emissions from diesel engines. The main objective of the present work is to achieve reduction of smoke through catalyst based oxygen enrichment technique which proves to be an effective one as it utilizes air from the ambient to produce oxygen-enriched air. The catalyst used for the present study is zeolite and its unique shape provides a cage like structure which helps in trapping nitrogen molecules and thereby increasing the oxygen content in the air stream by Pressure Swing Adsorption (PSA). While conducting a bench test using zeolite pellets packed inside a module and blowing air through this arrangement, there was an increase in oxygen concentration from 21 – 22.5 % by volume. Based on the test result oxygen enrichment proves to be a better technique for reducing smoke emissions from diesel engines. The oxygen-enriching device can also be made compact and hence the need for oxygen cylinders is eliminated.

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