Title: Catalytic reduction of NO_x on vanadium exchanged natural zeolite using microwave irradiation

Authors: A.O. Emiroglu; O. Eldogan; M. Teker; A. Keskin; I. Ekmekci

Addresses: Department of Mechanical Engineering, Abant Izzet Baysal University, Bolu 14100, Turkey ' Department of Mechatronics, Sakarya University, Sakarya 54187, Turkey ' Department of Chemistry, Sakarya University, Sakarya 54187, Turkey ' Department of Automotive, Abant Izzet Baysal University, Bolu 14100, Turkey ' Department of Industry Engineering, Istanbul Commerce University, Istanbul 34840, Turkey

Abstract: Zeolite-based catalysts are used commonly to control NO_x emissions in selective catalytic reduction applications in lean combustion gasoline engines. In this study, a catalyst was prepared by ion-exchange of vanadium promoted using microwave irradiation, over the clinoptilolite type of natural zeolite to selectively reduce the nitrogen oxides, especially in lean combustion conditions with the HCs in the exhaust gas. According to experimental results, the maximum NO_x conversion efficiency reached 28% at temperature of 287°C and space velocity of 30,000 h^-1.

Keywords: natural zeolite; clinoptilolite; catalyst; exhaust emissions; HC-SCR; hydrocarbons; microwave irradiation; selective catalytic reduction; NOx emissions; nitrogen oxides; vanadium; lean combustion; gasoline engines; petrol engines; vehicle emissions; air pollution.

DOI: 10.1504/IJVD.2012.048700

International Journal of Vehicle Design, 2012 Vol.59 No.2/3, pp.212 - 222

Published online: 23 Apr 2013 *

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